CVE-2025-20224Network attack vector

IKEv2 service interruption via crafted packet stream

Published Aug 14, 2025 · Updated Aug 14, 2025

Memory leaks in Cisco Secure Firewall ASA and FTD Software allow remote attackers to interrupt IKEv2 VPN service via crafted packets. The IKEv2 parser improperly processes attacker-controlled packets and fails to release memory as the packets are handled. The device is exposed only when IKEv2 VPN is enabled; a sustained packet stream can prevent new IKEv2 sessions and leave manual reboot as the recovery path.

CVSS severity5.8
Medium
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leaks in Cisco Secure Firewall ASA and FTD Software allow remote attackers to interrupt IKEv2 VPN service via crafted packets. The IKEv2 parser improperly processes attacker-controlled packets and fails to release memory as the packets are handled. The device is exposed only when IKEv2 VPN is enabled; a sustained packet stream can prevent new IKEv2 sessions and leave manual reboot as the recovery path.

The record

CVE
CVE-2025-20224
Published
Aug 14, 2025
Updated
Aug 14, 2025
Vendor
ClamAV
Product
Cisco Adaptive Security Appliance (ASA) Software
Classifications
CWE-401, T1499.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 14, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=9.12.1
  2. Affected versionversion=9.12.1.2
  3. Affected versionversion=9.12.1.3
  4. Affected versionversion=9.12.2
  5. Affected versionversion=9.12.2.1
  6. Affected versionversion=9.12.2.4
  7. Affected versionversion=9.12.2.5
  8. Affected versionversion=9.12.2.9
  9. Affected versionversion=9.12.3
  10. Affected versionversion=9.12.3.12
  11. Affected versionversion=9.12.3.2
  12. Affected versionversion=9.12.3.7
  13. Affected versionversion=9.12.3.9
  14. Affected versionversion=9.12.4
  15. Affected versionversion=9.12.4.10
  16. Affected versionversion=9.12.4.13
  17. Affected versionversion=9.12.4.18
  18. Affected versionversion=9.12.4.2
  19. Affected versionversion=9.12.4.24
  20. Affected versionversion=9.12.4.26
  21. Affected versionversion=9.12.4.29
  22. Affected versionversion=9.12.4.30
  23. Affected versionversion=9.12.4.35
  24. Affected versionversion=9.12.4.37
  25. Affected versionversion=9.12.4.38
  26. Affected versionversion=9.12.4.39
  27. Affected versionversion=9.12.4.4
  28. Affected versionversion=9.12.4.40
  29. Affected versionversion=9.12.4.41
  30. Affected versionversion=9.12.4.47
  31. Affected versionversion=9.12.4.48
  32. Affected versionversion=9.12.4.50
  33. Affected versionversion=9.12.4.52
  34. Affected versionversion=9.12.4.54
  35. Affected versionversion=9.12.4.55
  36. Affected versionversion=9.12.4.56
  37. Affected versionversion=9.12.4.58
  38. Affected versionversion=9.12.4.62
  39. Affected versionversion=9.12.4.65
  40. Affected versionversion=9.12.4.67
  41. Affected versionversion=9.12.4.7
  42. Affected versionversion=9.12.4.8
  43. Affected versionversion=9.14.1
  44. Affected versionversion=9.14.1.10
  45. Affected versionversion=9.14.1.15
  46. Affected versionversion=9.14.1.19
  47. Affected versionversion=9.14.1.30
  48. Affected versionversion=9.14.1.6
  49. Affected versionversion=9.14.2
  50. Affected versionversion=9.14.2.13
  51. Affected versionversion=9.14.2.15
  52. Affected versionversion=9.14.2.4
  53. Affected versionversion=9.14.2.8
  54. Affected versionversion=9.14.3
  55. Affected versionversion=9.14.3.1
  56. Affected versionversion=9.14.3.11
  57. Affected versionversion=9.14.3.13
  58. Affected versionversion=9.14.3.15
  59. Affected versionversion=9.14.3.18
  60. Affected versionversion=9.14.3.9
  61. Affected versionversion=9.14.4
  62. Affected versionversion=9.14.4.12
  63. Affected versionversion=9.14.4.13
  64. Affected versionversion=9.14.4.14
  65. Affected versionversion=9.14.4.15
  66. Affected versionversion=9.14.4.17
  67. Affected versionversion=9.14.4.22
  68. Affected versionversion=9.14.4.23
  69. Affected versionversion=9.14.4.24
  70. Affected versionversion=9.14.4.6
  71. Affected versionversion=9.14.4.7
  72. Affected versionversion=9.16.1
  73. Affected versionversion=9.16.1.28
  74. Affected versionversion=9.16.2
  75. Affected versionversion=9.16.2.11
  76. Affected versionversion=9.16.2.13
  77. Affected versionversion=9.16.2.14
  78. Affected versionversion=9.16.2.3
  79. Affected versionversion=9.16.2.7
  80. Affected versionversion=9.16.3
  81. Affected versionversion=9.16.3.14
  82. Affected versionversion=9.16.3.15
  83. Affected versionversion=9.16.3.19
  84. Affected versionversion=9.16.3.23
  85. Affected versionversion=9.16.3.3
  86. Affected versionversion=9.16.4
  87. Affected versionversion=9.16.4.14
  88. Affected versionversion=9.16.4.18
  89. Affected versionversion=9.16.4.19
  90. Affected versionversion=9.16.4.27
  91. Affected versionversion=9.16.4.38
  92. Affected versionversion=9.16.4.39
  93. Affected versionversion=9.16.4.42
  94. Affected versionversion=9.16.4.48
  95. Affected versionversion=9.16.4.55
  96. Affected versionversion=9.16.4.57
  97. Affected versionversion=9.16.4.61
  98. Affected versionversion=9.16.4.62
  99. Affected versionversion=9.16.4.67
  100. Affected versionversion=9.16.4.70
  101. Affected versionversion=9.16.4.71
  102. Affected versionversion=9.16.4.76
  103. Affected versionversion=9.16.4.82
  104. Affected versionversion=9.16.4.9
  105. Affected versionversion=9.17.1
  106. Affected versionversion=9.17.1.10
  107. Affected versionversion=9.17.1.11
  108. Affected versionversion=9.17.1.13
  109. Affected versionversion=9.17.1.15
  110. Affected versionversion=9.17.1.20
  111. Affected versionversion=9.17.1.30
  112. Affected versionversion=9.17.1.33
  113. Affected versionversion=9.17.1.39
  114. Affected versionversion=9.17.1.45
  115. Affected versionversion=9.17.1.46
  116. Affected versionversion=9.17.1.7
  117. Affected versionversion=9.17.1.9
  118. Affected versionversion=9.18.1
  119. Affected versionversion=9.18.1.3
  120. Affected versionversion=9.18.2
  121. Affected versionversion=9.18.2.5
  122. Affected versionversion=9.18.2.7
  123. Affected versionversion=9.18.2.8
  124. Affected versionversion=9.18.3
  125. Affected versionversion=9.18.3.39
  126. Affected versionversion=9.18.3.46
  127. Affected versionversion=9.18.3.53
  128. Affected versionversion=9.18.3.55
  129. Affected versionversion=9.18.3.56
  130. Affected versionversion=9.18.4
  131. Affected versionversion=9.18.4.22
  132. Affected versionversion=9.18.4.24
  133. Affected versionversion=9.18.4.29
  134. Affected versionversion=9.18.4.34
  135. Affected versionversion=9.18.4.40
  136. Affected versionversion=9.18.4.47
  137. Affected versionversion=9.18.4.5
  138. Affected versionversion=9.18.4.50
  139. Affected versionversion=9.18.4.52
  140. Affected versionversion=9.18.4.53
  141. Affected versionversion=9.18.4.8
  142. Affected versionversion=9.19.1
  143. Affected versionversion=9.19.1.12
  144. Affected versionversion=9.19.1.18
  145. Affected versionversion=9.19.1.22
  146. Affected versionversion=9.19.1.24
  147. Affected versionversion=9.19.1.27
  148. Affected versionversion=9.19.1.28
  149. Affected versionversion=9.19.1.31
  150. Affected versionversion=9.19.1.37
  151. Affected versionversion=9.19.1.38
  152. Affected versionversion=9.19.1.5
  153. Affected versionversion=9.19.1.9
  154. Affected versionversion=9.20.1
  155. Affected versionversion=9.20.1.5
  156. Affected versionversion=9.20.2
  157. Affected versionversion=9.20.2.10
  158. Affected versionversion=9.20.2.21
  159. Affected versionversion=9.20.2.22
  160. Affected versionversion=9.20.3
  161. Affected versionversion=9.20.3.10
  162. Affected versionversion=9.20.3.13
  163. Affected versionversion=9.20.3.4
  164. Affected versionversion=9.20.3.7
  165. Affected versionversion=9.20.3.9
  166. Affected versionversion=9.22.1.1
  167. Affected versionversion=9.22.1.2
  168. Affected versionversion=9.22.1.3
  169. Affected versionversion=9.22.1.6
  170. Affected versionversion=9.23.1
  171. Affected versionversion=9.8.1
  172. Affected versionversion=9.8.1.5
  173. Affected versionversion=9.8.1.7
  174. Affected versionversion=9.8.2
  175. Affected versionversion=9.8.2.14
  176. Affected versionversion=9.8.2.15
  177. Affected versionversion=9.8.2.17
  178. Affected versionversion=9.8.2.20
  179. Affected versionversion=9.8.2.24
  180. Affected versionversion=9.8.2.26
  181. Affected versionversion=9.8.2.28
  182. Affected versionversion=9.8.2.33
  183. Affected versionversion=9.8.2.35
  184. Affected versionversion=9.8.2.38
  185. Affected versionversion=9.8.2.45
  186. Affected versionversion=9.8.2.8
  187. Affected versionversion=9.8.3
  188. Affected versionversion=9.8.3.11
  189. Affected versionversion=9.8.3.14
  190. Affected versionversion=9.8.3.16
  191. Affected versionversion=9.8.3.18
  192. Affected versionversion=9.8.3.21
  193. Affected versionversion=9.8.3.26
  194. Affected versionversion=9.8.3.29
  195. Affected versionversion=9.8.3.8
  196. Affected versionversion=9.8.4
  197. Affected versionversion=9.8.4.10
  198. Affected versionversion=9.8.4.12
  199. Affected versionversion=9.8.4.15
  200. Affected versionversion=9.8.4.17
  201. Affected versionversion=9.8.4.20
  202. Affected versionversion=9.8.4.22
  203. Affected versionversion=9.8.4.25
  204. Affected versionversion=9.8.4.26
  205. Affected versionversion=9.8.4.29
  206. Affected versionversion=9.8.4.3
  207. Affected versionversion=9.8.4.32
  208. Affected versionversion=9.8.4.33
  209. Affected versionversion=9.8.4.34
  210. Affected versionversion=9.8.4.35
  211. Affected versionversion=9.8.4.39
  212. Affected versionversion=9.8.4.40
  213. Affected versionversion=9.8.4.41
  214. Affected versionversion=9.8.4.43
  215. Affected versionversion=9.8.4.44
  216. Affected versionversion=9.8.4.45
  217. Affected versionversion=9.8.4.46
  218. Affected versionversion=9.8.4.48
  219. Affected versionversion=9.8.4.7
  220. Affected versionversion=9.8.4.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco Adaptive Security Appliance (ASA) Softwareversion=9.12.1; version=9.12.1.2; version=9.12.1.3; version=9.12.2; version=9.12.2.1; version=9.12.2.4; version=9.12.2.5; version=9.12.2.9; version=9.12.3; version=9.12.3.12; version=9.12.3.2; version=9.12.3.7; version=9.12.3.9; version=9.12.4; version=9.12.4.10; version=9.12.4.13; version=9.12.4.18; version=9.12.4.2; version=9.12.4.24; version=9.12.4.26; version=9.12.4.29; version=9.12.4.30; version=9.12.4.35; version=9.12.4.37; version=9.12.4.38; version=9.12.4.39; version=9.12.4.4; version=9.12.4.40; version=9.12.4.41; version=9.12.4.47; version=9.12.4.48; version=9.12.4.50; version=9.12.4.52; version=9.12.4.54; version=9.12.4.55; version=9.12.4.56; version=9.12.4.58; version=9.12.4.62; version=9.12.4.65; version=9.12.4.67; version=9.12.4.7; version=9.12.4.8; version=9.14.1; version=9.14.1.10; version=9.14.1.15; version=9.14.1.19; version=9.14.1.30; version=9.14.1.6; version=9.14.2; version=9.14.2.13; version=9.14.2.15; version=9.14.2.4; version=9.14.2.8; version=9.14.3; version=9.14.3.1; version=9.14.3.11; version=9.14.3.13; version=9.14.3.15; version=9.14.3.18; version=9.14.3.9; version=9.14.4; version=9.14.4.12; version=9.14.4.13; version=9.14.4.14; version=9.14.4.15; version=9.14.4.17; version=9.14.4.22; version=9.14.4.23; version=9.14.4.24; version=9.14.4.6; version=9.14.4.7; version=9.16.1; version=9.16.1.28; version=9.16.2; version=9.16.2.11; version=9.16.2.13; version=9.16.2.14; version=9.16.2.3; version=9.16.2.7; version=9.16.3; version=9.16.3.14; version=9.16.3.15; version=9.16.3.19; version=9.16.3.23; version=9.16.3.3; version=9.16.4; version=9.16.4.14; version=9.16.4.18; version=9.16.4.19; version=9.16.4.27; version=9.16.4.38; version=9.16.4.39; version=9.16.4.42; version=9.16.4.48; version=9.16.4.55; version=9.16.4.57; version=9.16.4.61; version=9.16.4.62; version=9.16.4.67; version=9.16.4.70; version=9.16.4.71; version=9.16.4.76; version=9.16.4.82; version=9.16.4.9; version=9.17.1; version=9.17.1.10; version=9.17.1.11; version=9.17.1.13; version=9.17.1.15; version=9.17.1.20; version=9.17.1.30; version=9.17.1.33; version=9.17.1.39; version=9.17.1.45; version=9.17.1.46; version=9.17.1.7; version=9.17.1.9; version=9.18.1; version=9.18.1.3; version=9.18.2; version=9.18.2.5; version=9.18.2.7; version=9.18.2.8; version=9.18.3; version=9.18.3.39; version=9.18.3.46; version=9.18.3.53; version=9.18.3.55; version=9.18.3.56; version=9.18.4; version=9.18.4.22; version=9.18.4.24; version=9.18.4.29; version=9.18.4.34; version=9.18.4.40; version=9.18.4.47; version=9.18.4.5; version=9.18.4.50; version=9.18.4.52; version=9.18.4.53; version=9.18.4.8; version=9.19.1; version=9.19.1.12; version=9.19.1.18; version=9.19.1.22; version=9.19.1.24; version=9.19.1.27; version=9.19.1.28; version=9.19.1.31; version=9.19.1.37; version=9.19.1.38; version=9.19.1.5; version=9.19.1.9; version=9.20.1; version=9.20.1.5; version=9.20.2; version=9.20.2.10; version=9.20.2.21; version=9.20.2.22; version=9.20.3; version=9.20.3.10; version=9.20.3.13; version=9.20.3.4; version=9.20.3.7; version=9.20.3.9; version=9.22.1.1; version=9.22.1.2; version=9.22.1.3; version=9.22.1.6; version=9.23.1; version=9.8.1; version=9.8.1.5; version=9.8.1.7; version=9.8.2; version=9.8.2.14; version=9.8.2.15; version=9.8.2.17; version=9.8.2.20; version=9.8.2.24; version=9.8.2.26; version=9.8.2.28; version=9.8.2.33; version=9.8.2.35; version=9.8.2.38; version=9.8.2.45; version=9.8.2.8; version=9.8.3; version=9.8.3.11; version=9.8.3.14; version=9.8.3.16; version=9.8.3.18; version=9.8.3.21; version=9.8.3.26; version=9.8.3.29; version=9.8.3.8; version=9.8.4; version=9.8.4.10; version=9.8.4.12; version=9.8.4.15; version=9.8.4.17; version=9.8.4.20; version=9.8.4.22; version=9.8.4.25; version=9.8.4.26; version=9.8.4.29; version=9.8.4.3; version=9.8.4.32; version=9.8.4.33; version=9.8.4.34; version=9.8.4.35; version=9.8.4.39; version=9.8.4.40; version=9.8.4.41; version=9.8.4.43; version=9.8.4.44; version=9.8.4.45; version=9.8.4.46; version=9.8.4.48; version=9.8.4.7; version=9.8.4.8
ClamAV · Cisco Firepower Threat Defenseversion=6.2.3; version=6.2.3.1; version=6.2.3.10; version=6.2.3.11; version=6.2.3.12; version=6.2.3.13; version=6.2.3.14; version=6.2.3.15; version=6.2.3.16; version=6.2.3.17; version=6.2.3.18; version=6.2.3.2; version=6.2.3.3; version=6.2.3.4; version=6.2.3.5; version=6.2.3.6; version=6.2.3.7; version=6.2.3.8; version=6.2.3.9; version=6.4.0; version=6.4.0.1; version=6.4.0.10; version=6.4.0.11; version=6.4.0.12; version=6.4.0.13; version=6.4.0.14; version=6.4.0.15; version=6.4.0.16; version=6.4.0.17; version=6.4.0.18; version=6.4.0.2; version=6.4.0.3; version=6.4.0.4; version=6.4.0.5; version=6.4.0.6; version=6.4.0.7; version=6.4.0.8; version=6.4.0.9; version=6.6.0; version=6.6.0.1; version=6.6.1; version=6.6.3; version=6.6.4; version=6.6.5; version=6.6.5.1; version=6.6.5.2; version=6.6.7; version=6.6.7.1; version=6.6.7.2; version=7.0.0; version=7.0.0.1; version=7.0.1; version=7.0.1.1; version=7.0.2; version=7.0.2.1; version=7.0.3; version=7.0.4; version=7.0.5; version=7.0.6; version=7.0.6.1; version=7.0.6.2; version=7.0.6.3; version=7.0.7; version=7.1.0; version=7.1.0.1; version=7.1.0.2; version=7.1.0.3; version=7.2.0; version=7.2.0.1; version=7.2.1; version=7.2.2; version=7.2.3; version=7.2.4; version=7.2.4.1; version=7.2.5; version=7.2.5.1; version=7.2.5.2; version=7.2.6; version=7.2.7; version=7.2.8; version=7.2.8.1; version=7.2.9; version=7.3.0; version=7.3.1; version=7.3.1.1; version=7.3.1.2; version=7.4.0; version=7.4.1; version=7.4.1.1; version=7.4.2; version=7.4.2.1; version=7.4.2.2; version=7.6.0; version=7.7.0

Published CVSS scores

5.8CiscoCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1499.002Service Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

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