CVE-2025-20192Network attack vector

Authenticated device reload via malformed IKEv1 parameters

Published May 7, 2025 · Updated May 7, 2025

Denial of service in Cisco IOS XE Software allows remote authenticated users to reload affected devices with crafted IKEv1 messages. The IKEv1 implementation fails to validate phase 2 parameters before sending an IPsec security-association request to the hardware cryptographic accelerator. Exploitation requires valid IKEv1 VPN credentials, an affected router or edge platform, and an enabled IKEv1 VPN configuration; the resulting reload interrupts service.

CVSS severity7.7
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Cisco IOS XE Software allows remote authenticated users to reload affected devices with crafted IKEv1 messages. The IKEv1 implementation fails to validate phase 2 parameters before sending an IPsec security-association request to the hardware cryptographic accelerator. Exploitation requires valid IKEv1 VPN credentials, an affected router or edge platform, and an enabled IKEv1 VPN configuration; the resulting reload interrupts service.

The record

CVE
CVE-2025-20192
Published
May 7, 2025
Updated
May 7, 2025
Vendor
ClamAV
Product
Cisco IOS XE Software
Classifications
CWE-232, T1498
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 7, 2025CVE publishedPublication date reported by the CVE source.
  2. May 7, 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=16.10.1
  2. Affected versionversion=16.10.1a
  3. Affected versionversion=16.10.1b
  4. Affected versionversion=16.10.1e
  5. Affected versionversion=16.10.1s
  6. Affected versionversion=16.10.2
  7. Affected versionversion=16.10.3
  8. Affected versionversion=16.11.1
  9. Affected versionversion=16.11.1a
  10. Affected versionversion=16.11.1s
  11. Affected versionversion=16.11.2
  12. Affected versionversion=16.12.1
  13. Affected versionversion=16.12.1a
  14. Affected versionversion=16.12.1c
  15. Affected versionversion=16.12.1s
  16. Affected versionversion=16.12.2
  17. Affected versionversion=16.12.2s
  18. Affected versionversion=16.12.3
  19. Affected versionversion=16.12.3s
  20. Affected versionversion=16.12.4
  21. Affected versionversion=16.12.5
  22. Affected versionversion=16.12.6
  23. Affected versionversion=16.12.7
  24. Affected versionversion=16.12.8
  25. Affected versionversion=16.2.1
  26. Affected versionversion=16.2.2
  27. Affected versionversion=16.3.1
  28. Affected versionversion=16.3.10
  29. Affected versionversion=16.3.11
  30. Affected versionversion=16.3.1a
  31. Affected versionversion=16.3.2
  32. Affected versionversion=16.3.3
  33. Affected versionversion=16.3.4
  34. Affected versionversion=16.3.5
  35. Affected versionversion=16.3.6
  36. Affected versionversion=16.3.7
  37. Affected versionversion=16.3.8
  38. Affected versionversion=16.3.9
  39. Affected versionversion=16.4.1
  40. Affected versionversion=16.4.2
  41. Affected versionversion=16.4.3
  42. Affected versionversion=16.5.1
  43. Affected versionversion=16.5.1b
  44. Affected versionversion=16.5.2
  45. Affected versionversion=16.5.3
  46. Affected versionversion=16.6.1
  47. Affected versionversion=16.6.10
  48. Affected versionversion=16.6.2
  49. Affected versionversion=16.6.3
  50. Affected versionversion=16.6.4
  51. Affected versionversion=16.6.5
  52. Affected versionversion=16.6.6
  53. Affected versionversion=16.6.7
  54. Affected versionversion=16.6.8
  55. Affected versionversion=16.6.9
  56. Affected versionversion=16.7.1
  57. Affected versionversion=16.7.2
  58. Affected versionversion=16.7.3
  59. Affected versionversion=16.8.1
  60. Affected versionversion=16.8.1s
  61. Affected versionversion=16.8.2
  62. Affected versionversion=16.8.3
  63. Affected versionversion=16.9.1
  64. Affected versionversion=16.9.1s
  65. Affected versionversion=16.9.2
  66. Affected versionversion=16.9.3
  67. Affected versionversion=16.9.4
  68. Affected versionversion=16.9.5
  69. Affected versionversion=16.9.6
  70. Affected versionversion=16.9.7
  71. Affected versionversion=16.9.8
  72. Affected versionversion=17.10.1
  73. Affected versionversion=17.10.1a
  74. Affected versionversion=17.1.1
  75. Affected versionversion=17.11.1
  76. Affected versionversion=17.11.1a
  77. Affected versionversion=17.1.1s
  78. Affected versionversion=17.1.1t
  79. Affected versionversion=17.12.1
  80. Affected versionversion=17.12.1a
  81. Affected versionversion=17.12.2
  82. Affected versionversion=17.12.2a
  83. Affected versionversion=17.12.3
  84. Affected versionversion=17.12.3a
  85. Affected versionversion=17.1.3
  86. Affected versionversion=17.13.1
  87. Affected versionversion=17.13.1a
  88. Affected versionversion=17.14.1
  89. Affected versionversion=17.14.1a
  90. Affected versionversion=17.2.1
  91. Affected versionversion=17.2.1r
  92. Affected versionversion=17.2.1v
  93. Affected versionversion=17.2.2
  94. Affected versionversion=17.2.3
  95. Affected versionversion=17.3.1
  96. Affected versionversion=17.3.1a
  97. Affected versionversion=17.3.2
  98. Affected versionversion=17.3.3
  99. Affected versionversion=17.3.4
  100. Affected versionversion=17.3.4a
  101. Affected versionversion=17.3.5
  102. Affected versionversion=17.3.6
  103. Affected versionversion=17.3.7
  104. Affected versionversion=17.3.8
  105. Affected versionversion=17.3.8a
  106. Affected versionversion=17.4.1
  107. Affected versionversion=17.4.1a
  108. Affected versionversion=17.4.1b
  109. Affected versionversion=17.4.2
  110. Affected versionversion=17.5.1
  111. Affected versionversion=17.5.1a
  112. Affected versionversion=17.6.1
  113. Affected versionversion=17.6.1a
  114. Affected versionversion=17.6.1y
  115. Affected versionversion=17.6.2
  116. Affected versionversion=17.6.3
  117. Affected versionversion=17.6.3a
  118. Affected versionversion=17.6.4
  119. Affected versionversion=17.6.5
  120. Affected versionversion=17.6.5a
  121. Affected versionversion=17.6.6
  122. Affected versionversion=17.6.6a
  123. Affected versionversion=17.6.7
  124. Affected versionversion=17.6.8
  125. Affected versionversion=17.6.8a
  126. Affected versionversion=17.7.1
  127. Affected versionversion=17.7.1a
  128. Affected versionversion=17.7.2
  129. Affected versionversion=17.8.1
  130. Affected versionversion=17.8.1a
  131. Affected versionversion=17.9.1
  132. Affected versionversion=17.9.1a
  133. Affected versionversion=17.9.2
  134. Affected versionversion=17.9.2a
  135. Affected versionversion=17.9.3
  136. Affected versionversion=17.9.3a
  137. Affected versionversion=17.9.4
  138. Affected versionversion=17.9.4a
  139. Affected versionversion=17.9.5
  140. Affected versionversion=17.9.5a
  141. Affected versionversion=17.9.5b
  142. Affected versionversion=17.9.5e
  143. Affected versionversion=17.9.5f
  144. Affected versionversion=3.13.0S
  145. Affected versionversion=3.13.10S
  146. Affected versionversion=3.13.1S
  147. Affected versionversion=3.13.2S
  148. Affected versionversion=3.13.3S
  149. Affected versionversion=3.13.4S
  150. Affected versionversion=3.13.5S
  151. Affected versionversion=3.13.6aS
  152. Affected versionversion=3.13.6S
  153. Affected versionversion=3.13.7S
  154. Affected versionversion=3.13.8S
  155. Affected versionversion=3.13.9S
  156. Affected versionversion=3.14.0S
  157. Affected versionversion=3.14.1S
  158. Affected versionversion=3.14.2S
  159. Affected versionversion=3.14.3S
  160. Affected versionversion=3.14.4S
  161. Affected versionversion=3.15.0S
  162. Affected versionversion=3.15.1cS
  163. Affected versionversion=3.15.1S
  164. Affected versionversion=3.15.2S
  165. Affected versionversion=3.15.3S
  166. Affected versionversion=3.15.4S
  167. Affected versionversion=3.16.0cS
  168. Affected versionversion=3.16.0S
  169. Affected versionversion=3.16.10S
  170. Affected versionversion=3.16.1aS
  171. Affected versionversion=3.16.2S
  172. Affected versionversion=3.16.3S
  173. Affected versionversion=3.16.4aS
  174. Affected versionversion=3.16.4bS
  175. Affected versionversion=3.16.4dS
  176. Affected versionversion=3.16.5S
  177. Affected versionversion=3.16.6bS
  178. Affected versionversion=3.16.6S
  179. Affected versionversion=3.16.7aS
  180. Affected versionversion=3.16.7bS
  181. Affected versionversion=3.16.7S
  182. Affected versionversion=3.16.8S
  183. Affected versionversion=3.16.9S
  184. Affected versionversion=3.17.0S
  185. Affected versionversion=3.17.1S
  186. Affected versionversion=3.17.2S
  187. Affected versionversion=3.17.3S
  188. Affected versionversion=3.17.4S
  189. Affected versionversion=3.18.2aSP

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ClamAV · Cisco IOS XE Softwareversion=16.10.1; version=16.10.1a; version=16.10.1b; version=16.10.1e; version=16.10.1s; version=16.10.2; version=16.10.3; version=16.11.1; version=16.11.1a; version=16.11.1s; version=16.11.2; version=16.12.1; version=16.12.1a; version=16.12.1c; version=16.12.1s; version=16.12.2; version=16.12.2s; version=16.12.3; version=16.12.3s; version=16.12.4; version=16.12.5; version=16.12.6; version=16.12.7; version=16.12.8; version=16.2.1; version=16.2.2; version=16.3.1; version=16.3.10; version=16.3.11; version=16.3.1a; version=16.3.2; version=16.3.3; version=16.3.4; version=16.3.5; version=16.3.6; version=16.3.7; version=16.3.8; version=16.3.9; version=16.4.1; version=16.4.2; version=16.4.3; version=16.5.1; version=16.5.1b; version=16.5.2; version=16.5.3; version=16.6.1; version=16.6.10; version=16.6.2; version=16.6.3; version=16.6.4; version=16.6.5; version=16.6.6; version=16.6.7; version=16.6.8; version=16.6.9; version=16.7.1; version=16.7.2; version=16.7.3; version=16.8.1; version=16.8.1s; version=16.8.2; version=16.8.3; version=16.9.1; version=16.9.1s; version=16.9.2; version=16.9.3; version=16.9.4; version=16.9.5; version=16.9.6; version=16.9.7; version=16.9.8; version=17.10.1; version=17.10.1a; version=17.1.1; version=17.11.1; version=17.11.1a; version=17.1.1s; version=17.1.1t; version=17.12.1; version=17.12.1a; version=17.12.2; version=17.12.2a; version=17.12.3; version=17.12.3a; version=17.1.3; version=17.13.1; version=17.13.1a; version=17.14.1; version=17.14.1a; version=17.2.1; version=17.2.1r; version=17.2.1v; version=17.2.2; version=17.2.3; version=17.3.1; version=17.3.1a; version=17.3.2; version=17.3.3; version=17.3.4; version=17.3.4a; version=17.3.5; version=17.3.6; version=17.3.7; version=17.3.8; version=17.3.8a; version=17.4.1; version=17.4.1a; version=17.4.1b; version=17.4.2; version=17.5.1; version=17.5.1a; version=17.6.1; version=17.6.1a; version=17.6.1y; version=17.6.2; version=17.6.3; version=17.6.3a; version=17.6.4; version=17.6.5; version=17.6.5a; version=17.6.6; version=17.6.6a; version=17.6.7; version=17.6.8; version=17.6.8a; version=17.7.1; version=17.7.1a; version=17.7.2; version=17.8.1; version=17.8.1a; version=17.9.1; version=17.9.1a; version=17.9.2; version=17.9.2a; version=17.9.3; version=17.9.3a; version=17.9.4; version=17.9.4a; version=17.9.5; version=17.9.5a; version=17.9.5b; version=17.9.5e; version=17.9.5f; version=3.13.0S; version=3.13.10S; version=3.13.1S; version=3.13.2S; version=3.13.3S; version=3.13.4S; version=3.13.5S; version=3.13.6aS; version=3.13.6S; version=3.13.7S; version=3.13.8S; version=3.13.9S; version=3.14.0S; version=3.14.1S; version=3.14.2S; version=3.14.3S; version=3.14.4S; version=3.15.0S; version=3.15.1cS; version=3.15.1S; version=3.15.2S; version=3.15.3S; version=3.15.4S; version=3.16.0cS; version=3.16.0S; version=3.16.10S; version=3.16.1aS; version=3.16.2S; version=3.16.3S; version=3.16.4aS; version=3.16.4bS; version=3.16.4dS; version=3.16.5S; version=3.16.6bS; version=3.16.6S; version=3.16.7aS; version=3.16.7bS; version=3.16.7S; version=3.16.8S; version=3.16.9S; version=3.17.0S; version=3.17.1S; version=3.17.2S; version=3.17.3S; version=3.17.4S; version=3.18.2aSP

Published CVSS scores

7.7CiscoCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-232Improper Handling of Undefined Values
T1498Network Denial of Service

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

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Your stack

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