CVE-2024-20510

Pre-authentication network access via ACL activation error

Published Sep 25, 2024 · Updated Sep 25, 2024

ACL bypass in Cisco IOS XE Software for Wireless Controllers allows physically proximate attackers to reach trusted networks before authentication. The CWA feature incorrectly activates a pre-authentication ACL received from the AAA server, allowing traffic that the configured ACL should deny. Exploitation requires a vulnerable IOS XE release on a supported wireless controller with CWA enabled and wireless proximity, and it bypasses only the pre-authentication ACL protections guarding network resources.

CVSS severity4.7
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

ACL bypass in Cisco IOS XE Software for Wireless Controllers allows physically proximate attackers to reach trusted networks before authentication. The CWA feature incorrectly activates a pre-authentication ACL received from the AAA server, allowing traffic that the configured ACL should deny. Exploitation requires a vulnerable IOS XE release on a supported wireless controller with CWA enabled and wireless proximity, and it bypasses only the pre-authentication ACL protections guarding network resources.

The record

CVE
CVE-2024-20510
Published
Sep 25, 2024
Updated
Sep 25, 2024
Vendor
ClamAV
Product
Cisco IOS XE Software
Classifications
CWE-863, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 25, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 2024Record 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=16.10.1c
  5. Affected versionversion=16.10.1d
  6. Affected versionversion=16.10.1e
  7. Affected versionversion=16.10.1f
  8. Affected versionversion=16.10.1g
  9. Affected versionversion=16.10.1s
  10. Affected versionversion=16.10.2
  11. Affected versionversion=16.10.3
  12. Affected versionversion=16.11.1
  13. Affected versionversion=16.11.1a
  14. Affected versionversion=16.11.1b
  15. Affected versionversion=16.11.1s
  16. Affected versionversion=16.11.2
  17. Affected versionversion=16.12.1
  18. Affected versionversion=16.12.10
  19. Affected versionversion=16.12.10a
  20. Affected versionversion=16.12.11
  21. Affected versionversion=16.12.1a
  22. Affected versionversion=16.12.1c
  23. Affected versionversion=16.12.1s
  24. Affected versionversion=16.12.1t
  25. Affected versionversion=16.12.1w
  26. Affected versionversion=16.12.1x
  27. Affected versionversion=16.12.1y
  28. Affected versionversion=16.12.1z1
  29. Affected versionversion=16.12.1z2
  30. Affected versionversion=16.12.2
  31. Affected versionversion=16.12.2a
  32. Affected versionversion=16.12.2s
  33. Affected versionversion=16.12.3
  34. Affected versionversion=16.12.3a
  35. Affected versionversion=16.12.3s
  36. Affected versionversion=16.12.4
  37. Affected versionversion=16.12.4a
  38. Affected versionversion=16.12.5
  39. Affected versionversion=16.12.5a
  40. Affected versionversion=16.12.5b
  41. Affected versionversion=16.12.6
  42. Affected versionversion=16.12.6a
  43. Affected versionversion=16.12.7
  44. Affected versionversion=16.12.8
  45. Affected versionversion=16.12.9
  46. Affected versionversion=16.3.1
  47. Affected versionversion=16.3.10
  48. Affected versionversion=16.3.11
  49. Affected versionversion=16.3.1a
  50. Affected versionversion=16.3.2
  51. Affected versionversion=16.3.3
  52. Affected versionversion=16.3.4
  53. Affected versionversion=16.3.5
  54. Affected versionversion=16.3.5b
  55. Affected versionversion=16.3.6
  56. Affected versionversion=16.3.7
  57. Affected versionversion=16.3.8
  58. Affected versionversion=16.3.9
  59. Affected versionversion=16.4.1
  60. Affected versionversion=16.4.2
  61. Affected versionversion=16.4.3
  62. Affected versionversion=16.5.1
  63. Affected versionversion=16.5.1a
  64. Affected versionversion=16.5.1b
  65. Affected versionversion=16.5.2
  66. Affected versionversion=16.5.3
  67. Affected versionversion=16.6.1
  68. Affected versionversion=16.6.10
  69. Affected versionversion=16.6.2
  70. Affected versionversion=16.6.3
  71. Affected versionversion=16.6.4
  72. Affected versionversion=16.6.4a
  73. Affected versionversion=16.6.5
  74. Affected versionversion=16.6.5a
  75. Affected versionversion=16.6.6
  76. Affected versionversion=16.6.7
  77. Affected versionversion=16.6.8
  78. Affected versionversion=16.6.9
  79. Affected versionversion=16.7.1
  80. Affected versionversion=16.7.1a
  81. Affected versionversion=16.7.1b
  82. Affected versionversion=16.7.2
  83. Affected versionversion=16.7.3
  84. Affected versionversion=16.7.4
  85. Affected versionversion=16.8.1
  86. Affected versionversion=16.8.1a
  87. Affected versionversion=16.8.1b
  88. Affected versionversion=16.8.1c
  89. Affected versionversion=16.8.1d
  90. Affected versionversion=16.8.1e
  91. Affected versionversion=16.8.1s
  92. Affected versionversion=16.8.2
  93. Affected versionversion=16.8.3
  94. Affected versionversion=16.9.1
  95. Affected versionversion=16.9.1a
  96. Affected versionversion=16.9.1b
  97. Affected versionversion=16.9.1s
  98. Affected versionversion=16.9.2
  99. Affected versionversion=16.9.3
  100. Affected versionversion=16.9.3a
  101. Affected versionversion=16.9.4
  102. Affected versionversion=16.9.5
  103. Affected versionversion=16.9.5f
  104. Affected versionversion=16.9.6
  105. Affected versionversion=16.9.7
  106. Affected versionversion=16.9.8
  107. Affected versionversion=17.10.1
  108. Affected versionversion=17.10.1a
  109. Affected versionversion=17.10.1b
  110. Affected versionversion=17.1.1
  111. Affected versionversion=17.11.1
  112. Affected versionversion=17.11.1a
  113. Affected versionversion=17.11.99SW
  114. Affected versionversion=17.1.1a
  115. Affected versionversion=17.1.1s
  116. Affected versionversion=17.1.1t
  117. Affected versionversion=17.12.1
  118. Affected versionversion=17.12.1a
  119. Affected versionversion=17.12.1w
  120. Affected versionversion=17.12.1x
  121. Affected versionversion=17.12.1y
  122. Affected versionversion=17.12.2
  123. Affected versionversion=17.12.2a
  124. Affected versionversion=17.12.3
  125. Affected versionversion=17.1.3
  126. Affected versionversion=17.13.1
  127. Affected versionversion=17.13.1a
  128. Affected versionversion=17.2.1
  129. Affected versionversion=17.2.1a
  130. Affected versionversion=17.2.1r
  131. Affected versionversion=17.2.1v
  132. Affected versionversion=17.2.2
  133. Affected versionversion=17.2.3
  134. Affected versionversion=17.3.1
  135. Affected versionversion=17.3.1a
  136. Affected versionversion=17.3.1w
  137. Affected versionversion=17.3.1x
  138. Affected versionversion=17.3.1z
  139. Affected versionversion=17.3.2
  140. Affected versionversion=17.3.2a
  141. Affected versionversion=17.3.3
  142. Affected versionversion=17.3.4
  143. Affected versionversion=17.3.4a
  144. Affected versionversion=17.3.4b
  145. Affected versionversion=17.3.4c
  146. Affected versionversion=17.3.5
  147. Affected versionversion=17.3.5a
  148. Affected versionversion=17.3.5b
  149. Affected versionversion=17.3.6
  150. Affected versionversion=17.3.7
  151. Affected versionversion=17.3.8
  152. Affected versionversion=17.3.8a
  153. Affected versionversion=17.4.1
  154. Affected versionversion=17.4.1a
  155. Affected versionversion=17.4.1b
  156. Affected versionversion=17.4.2
  157. Affected versionversion=17.4.2a
  158. Affected versionversion=17.5.1
  159. Affected versionversion=17.5.1a
  160. Affected versionversion=17.6.1
  161. Affected versionversion=17.6.1a
  162. Affected versionversion=17.6.1w
  163. Affected versionversion=17.6.1x
  164. Affected versionversion=17.6.1y
  165. Affected versionversion=17.6.1z
  166. Affected versionversion=17.6.1z1
  167. Affected versionversion=17.6.2
  168. Affected versionversion=17.6.3
  169. Affected versionversion=17.6.3a
  170. Affected versionversion=17.6.4
  171. Affected versionversion=17.6.5
  172. Affected versionversion=17.6.5a
  173. Affected versionversion=17.6.6
  174. Affected versionversion=17.6.6a
  175. Affected versionversion=17.6.7
  176. Affected versionversion=17.7.1
  177. Affected versionversion=17.7.1a
  178. Affected versionversion=17.7.1b
  179. Affected versionversion=17.7.2
  180. Affected versionversion=17.8.1
  181. Affected versionversion=17.8.1a
  182. Affected versionversion=17.9.1
  183. Affected versionversion=17.9.1a
  184. Affected versionversion=17.9.1w
  185. Affected versionversion=17.9.1x
  186. Affected versionversion=17.9.1x1
  187. Affected versionversion=17.9.1y
  188. Affected versionversion=17.9.1y1
  189. Affected versionversion=17.9.2
  190. Affected versionversion=17.9.2a
  191. Affected versionversion=17.9.3
  192. Affected versionversion=17.9.3a
  193. Affected versionversion=17.9.4
  194. Affected versionversion=17.9.4a
  195. Affected versionversion=17.9.5
  196. Affected versionversion=17.9.5a
  197. Affected versionversion=17.9.5b

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco IOS XE Softwareversion=16.10.1; version=16.10.1a; version=16.10.1b; version=16.10.1c; version=16.10.1d; version=16.10.1e; version=16.10.1f; version=16.10.1g; version=16.10.1s; version=16.10.2; version=16.10.3; version=16.11.1; version=16.11.1a; version=16.11.1b; version=16.11.1s; version=16.11.2; version=16.12.1; version=16.12.10; version=16.12.10a; version=16.12.11; version=16.12.1a; version=16.12.1c; version=16.12.1s; version=16.12.1t; version=16.12.1w; version=16.12.1x; version=16.12.1y; version=16.12.1z1; version=16.12.1z2; version=16.12.2; version=16.12.2a; version=16.12.2s; version=16.12.3; version=16.12.3a; version=16.12.3s; version=16.12.4; version=16.12.4a; version=16.12.5; version=16.12.5a; version=16.12.5b; version=16.12.6; version=16.12.6a; version=16.12.7; version=16.12.8; version=16.12.9; 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=16.3.5b; 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=16.5.1a; 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=16.6.4a; version=16.6.5; version=16.6.5a; version=16.6.6; version=16.6.7; version=16.6.8; version=16.6.9; version=16.7.1; version=16.7.1a; version=16.7.1b; version=16.7.2; version=16.7.3; version=16.7.4; version=16.8.1; version=16.8.1a; version=16.8.1b; version=16.8.1c; version=16.8.1d; version=16.8.1e; version=16.8.1s; version=16.8.2; version=16.8.3; version=16.9.1; version=16.9.1a; version=16.9.1b; version=16.9.1s; version=16.9.2; version=16.9.3; version=16.9.3a; version=16.9.4; version=16.9.5; version=16.9.5f; version=16.9.6; version=16.9.7; version=16.9.8; version=17.10.1; version=17.10.1a; version=17.10.1b; version=17.1.1; version=17.11.1; version=17.11.1a; version=17.11.99SW; version=17.1.1a; version=17.1.1s; version=17.1.1t; version=17.12.1; version=17.12.1a; version=17.12.1w; version=17.12.1x; version=17.12.1y; version=17.12.2; version=17.12.2a; version=17.12.3; version=17.1.3; version=17.13.1; version=17.13.1a; version=17.2.1; version=17.2.1a; 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=17.3.1w; version=17.3.1x; version=17.3.1z; version=17.3.2; version=17.3.2a; version=17.3.3; version=17.3.4; version=17.3.4a; version=17.3.4b; version=17.3.4c; version=17.3.5; version=17.3.5a; version=17.3.5b; 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=17.4.2a; version=17.5.1; version=17.5.1a; version=17.6.1; version=17.6.1a; version=17.6.1w; version=17.6.1x; version=17.6.1y; version=17.6.1z; version=17.6.1z1; 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=17.7.1; version=17.7.1a; version=17.7.1b; version=17.7.2; version=17.8.1; version=17.8.1a; version=17.9.1; version=17.9.1a; version=17.9.1w; version=17.9.1x; version=17.9.1x1; version=17.9.1y; version=17.9.1y1; 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

Published CVSS scores

4.7CiscoCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N/E:X/RL:X/RC:X

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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1210Exploitation of 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.

Technologies

Your stack

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Your stack

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