CVE-2023-20269Known exploitationNetwork attack vector

Unauthorized VPN access via improperly separated AAA

Published Sep 6, 2023 · Updated Aug 6, 2026

Authorization flaws in Cisco ASA and FTD remote access VPN allow remote attackers to identify valid credentials through brute-force attempts. The VPN accepts a default connection profile because AAA state is not properly separated from HTTPS management and site-to-site VPN features. Exposure requires SSL VPN or IKEv2 on an interface plus a local password or valid AAA server; clientless access still requires valid credentials and any configured second factor.

CVSS severity5.0
Medium
EPSS probability25.45%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization flaws in Cisco ASA and FTD remote access VPN allow remote attackers to identify valid credentials through brute-force attempts. The VPN accepts a default connection profile because AAA state is not properly separated from HTTPS management and site-to-site VPN features. Exposure requires SSL VPN or IKEv2 on an interface plus a local password or valid AAA server; clientless access still requires valid credentials and any configured second factor.

The record

CVE
CVE-2023-20269
Published
Sep 6, 2023
Updated
Aug 6, 2026
Vendor
ClamAV
Product
Cisco Adaptive Security Appliance (ASA) Software
Classifications
CWE-863, CWE-288, T1110, T1133
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 13, 2023Exploitation reportedCISA Known Exploited Vulnerabilities catalog entry
  3. Aug 6, 2026Record 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=9.12.4.7
  39. Affected versionversion=9.12.4.8
  40. Affected versionversion=9.14.1
  41. Affected versionversion=9.14.1.10
  42. Affected versionversion=9.14.1.15
  43. Affected versionversion=9.14.1.19
  44. Affected versionversion=9.14.1.30
  45. Affected versionversion=9.14.1.6
  46. Affected versionversion=9.14.2
  47. Affected versionversion=9.14.2.13
  48. Affected versionversion=9.14.2.15
  49. Affected versionversion=9.14.2.4
  50. Affected versionversion=9.14.2.8
  51. Affected versionversion=9.14.3
  52. Affected versionversion=9.14.3.1
  53. Affected versionversion=9.14.3.11
  54. Affected versionversion=9.14.3.13
  55. Affected versionversion=9.14.3.15
  56. Affected versionversion=9.14.3.18
  57. Affected versionversion=9.14.3.9
  58. Affected versionversion=9.14.4
  59. Affected versionversion=9.14.4.12
  60. Affected versionversion=9.14.4.13
  61. Affected versionversion=9.14.4.14
  62. Affected versionversion=9.14.4.15
  63. Affected versionversion=9.14.4.17
  64. Affected versionversion=9.14.4.22
  65. Affected versionversion=9.14.4.23
  66. Affected versionversion=9.14.4.6
  67. Affected versionversion=9.14.4.7
  68. Affected versionversion=9.15.1
  69. Affected versionversion=9.15.1.1
  70. Affected versionversion=9.15.1.10
  71. Affected versionversion=9.15.1.15
  72. Affected versionversion=9.15.1.16
  73. Affected versionversion=9.15.1.17
  74. Affected versionversion=9.15.1.21
  75. Affected versionversion=9.15.1.7
  76. Affected versionversion=9.16.1
  77. Affected versionversion=9.16.1.28
  78. Affected versionversion=9.16.2
  79. Affected versionversion=9.16.2.11
  80. Affected versionversion=9.16.2.13
  81. Affected versionversion=9.16.2.14
  82. Affected versionversion=9.16.2.3
  83. Affected versionversion=9.16.2.7
  84. Affected versionversion=9.16.3
  85. Affected versionversion=9.16.3.14
  86. Affected versionversion=9.16.3.15
  87. Affected versionversion=9.16.3.19
  88. Affected versionversion=9.16.3.23
  89. Affected versionversion=9.16.3.3
  90. Affected versionversion=9.16.4
  91. Affected versionversion=9.16.4.14
  92. Affected versionversion=9.16.4.18
  93. Affected versionversion=9.16.4.19
  94. Affected versionversion=9.16.4.27
  95. Affected versionversion=9.16.4.38
  96. Affected versionversion=9.16.4.9
  97. Affected versionversion=9.17.1
  98. Affected versionversion=9.17.1.10
  99. Affected versionversion=9.17.1.11
  100. Affected versionversion=9.17.1.13
  101. Affected versionversion=9.17.1.15
  102. Affected versionversion=9.17.1.20
  103. Affected versionversion=9.17.1.30
  104. Affected versionversion=9.17.1.7
  105. Affected versionversion=9.17.1.9
  106. Affected versionversion=9.18.1
  107. Affected versionversion=9.18.1.3
  108. Affected versionversion=9.18.2
  109. Affected versionversion=9.18.2.5
  110. Affected versionversion=9.18.2.7
  111. Affected versionversion=9.18.2.8
  112. Affected versionversion=9.18.3
  113. Affected versionversion=9.18.3.39
  114. Affected versionversion=9.18.3.46
  115. Affected versionversion=9.18.3.53
  116. Affected versionversion=9.18.3.55
  117. Affected versionversion=9.19.1
  118. Affected versionversion=9.19.1.12
  119. Affected versionversion=9.19.1.18
  120. Affected versionversion=9.19.1.5
  121. Affected versionversion=9.19.1.9
  122. Affected versionversion=9.8.1
  123. Affected versionversion=9.8.1.5
  124. Affected versionversion=9.8.1.7
  125. Affected versionversion=9.8.2
  126. Affected versionversion=9.8.2.14
  127. Affected versionversion=9.8.2.15
  128. Affected versionversion=9.8.2.17
  129. Affected versionversion=9.8.2.20
  130. Affected versionversion=9.8.2.24
  131. Affected versionversion=9.8.2.26
  132. Affected versionversion=9.8.2.28
  133. Affected versionversion=9.8.2.33
  134. Affected versionversion=9.8.2.35
  135. Affected versionversion=9.8.2.38
  136. Affected versionversion=9.8.2.8
  137. Affected versionversion=9.8.3
  138. Affected versionversion=9.8.3.11
  139. Affected versionversion=9.8.3.14
  140. Affected versionversion=9.8.3.16
  141. Affected versionversion=9.8.3.18
  142. Affected versionversion=9.8.3.21
  143. Affected versionversion=9.8.3.26
  144. Affected versionversion=9.8.3.29
  145. Affected versionversion=9.8.3.8
  146. Affected versionversion=9.8.4
  147. Affected versionversion=9.8.4.10
  148. Affected versionversion=9.8.4.12
  149. Affected versionversion=9.8.4.15
  150. Affected versionversion=9.8.4.17
  151. Affected versionversion=9.8.4.20
  152. Affected versionversion=9.8.4.22
  153. Affected versionversion=9.8.4.25
  154. Affected versionversion=9.8.4.26
  155. Affected versionversion=9.8.4.29
  156. Affected versionversion=9.8.4.3
  157. Affected versionversion=9.8.4.32
  158. Affected versionversion=9.8.4.33
  159. Affected versionversion=9.8.4.34
  160. Affected versionversion=9.8.4.35
  161. Affected versionversion=9.8.4.39
  162. Affected versionversion=9.8.4.40
  163. Affected versionversion=9.8.4.41
  164. Affected versionversion=9.8.4.43
  165. Affected versionversion=9.8.4.44
  166. Affected versionversion=9.8.4.45
  167. Affected versionversion=9.8.4.46
  168. Affected versionversion=9.8.4.48
  169. Affected versionversion=9.8.4.7
  170. 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=9.12.4.7; 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=9.14.4.6; version=9.14.4.7; version=9.15.1; version=9.15.1.1; version=9.15.1.10; version=9.15.1.15; version=9.15.1.16; version=9.15.1.17; version=9.15.1.21; version=9.15.1.7; 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=9.16.4.9; 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=9.17.1.7; 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=9.19.1; version=9.19.1.12; version=9.19.1.18; version=9.19.1.5; version=9.19.1.9; 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=9.8.2.8; 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=6.4.0.2; 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=6.7.0; version=6.7.0.1; version=6.7.0.2; version=6.7.0.3; 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=7.1.0; 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=7.3.0; version=7.3.1; version=7.3.1.1; version=7.4.0

Published CVSS scores

9.1NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
5.0Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N

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 exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
CWE-288Authentication Bypass Using an Alternate Path or Channel
T1110Brute Force
T1133External Remote Services

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.

Reported exploitation

Technologies

Your stack

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Your stack

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