CVE-2024-20271Network attack vector

Unauthenticated reload via malformed IPv4 packet

Published Mar 27, 2024 · Updated Aug 1, 2024

IPv4 packet-processing failure in Cisco Access Point Software allows remote attackers to force an unexpected device reload. The packet-processing path insufficiently validates certain crafted IPv4 packets sent to or through an affected access point before handling them. Exploitation requires no authentication or AP association and interrupts wireless service by reloading the device; IPv6 traffic cannot trigger the flaw.

CVSS severity8.6
High
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

IPv4 packet-processing failure in Cisco Access Point Software allows remote attackers to force an unexpected device reload. The packet-processing path insufficiently validates certain crafted IPv4 packets sent to or through an affected access point before handling them. Exploitation requires no authentication or AP association and interrupts wireless service by reloading the device; IPv6 traffic cannot trigger the flaw.

The record

CVE
CVE-2024-20271
Published
Mar 27, 2024
Updated
Aug 1, 2024
Vendor
ClamAV
Product
Cisco Aironet Access Point Software (IOS XE Controller)
Classifications
CWE-20, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 27, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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=16.10.1e
  3. Affected versionversion=16.11.1
  4. Affected versionversion=16.11.1a
  5. Affected versionversion=16.11.1b
  6. Affected versionversion=16.11.1c
  7. Affected versionversion=16.12.1
  8. Affected versionversion=16.12.1s
  9. Affected versionversion=16.12.1t
  10. Affected versionversion=16.12.2s
  11. Affected versionversion=16.12.3
  12. Affected versionversion=16.12.4
  13. Affected versionversion=16.12.4a
  14. Affected versionversion=16.12.5
  15. Affected versionversion=16.12.6
  16. Affected versionversion=16.12.6a
  17. Affected versionversion=16.12.7
  18. Affected versionversion=16.12.8
  19. Affected versionversion=17.10.1
  20. Affected versionversion=17.1.1
  21. Affected versionversion=17.11.1
  22. Affected versionversion=17.1.1s
  23. Affected versionversion=17.1.1t
  24. Affected versionversion=17.12.1
  25. Affected versionversion=17.2.1
  26. Affected versionversion=17.2.1a
  27. Affected versionversion=17.2.2
  28. Affected versionversion=17.2.3
  29. Affected versionversion=17.3.1
  30. Affected versionversion=17.3.2
  31. Affected versionversion=17.3.2a
  32. Affected versionversion=17.3.3
  33. Affected versionversion=17.3.4
  34. Affected versionversion=17.3.4c
  35. Affected versionversion=17.3.5
  36. Affected versionversion=17.3.5a
  37. Affected versionversion=17.3.5b
  38. Affected versionversion=17.3.6
  39. Affected versionversion=17.4.1
  40. Affected versionversion=17.4.2
  41. Affected versionversion=17.5.1
  42. Affected versionversion=17.6.1
  43. Affected versionversion=17.6.2
  44. Affected versionversion=17.6.3
  45. Affected versionversion=17.6.4
  46. Affected versionversion=17.6.5
  47. Affected versionversion=17.7.1
  48. Affected versionversion=17.8.1
  49. Affected versionversion=17.9.1
  50. Affected versionversion=17.9.2
  51. Affected versionversion=17.9.3
  52. Affected versionversion=17.9.4
  53. Affected versionversion=17.9.4a
  54. Affected versionversion=8.10.111.0
  55. Affected versionversion=8.10.112.0
  56. Affected versionversion=8.10.113.0
  57. Affected versionversion=8.10.121.0
  58. Affected versionversion=8.10.122.0
  59. Affected versionversion=8.10.130.0
  60. Affected versionversion=8.10.141.0
  61. Affected versionversion=8.10.142.0
  62. Affected versionversion=8.10.150.0
  63. Affected versionversion=8.10.151.0
  64. Affected versionversion=8.10.161.0
  65. Affected versionversion=8.10.162.0
  66. Affected versionversion=8.10.170.0
  67. Affected versionversion=8.10.171.0
  68. Affected versionversion=8.10.181.0
  69. Affected versionversion=8.10.182.0
  70. Affected versionversion=8.10.183.0
  71. Affected versionversion=8.10.185.0
  72. Affected versionversion=8.2\(100.0\)
  73. Affected versionversion=8.2.110.0
  74. Affected versionversion=8.2.111.0
  75. Affected versionversion=8.2.121.0
  76. Affected versionversion=8.2\(130.0\)
  77. Affected versionversion=8.2.141.0
  78. Affected versionversion=8.2.151.0
  79. Affected versionversion=8.2.160.0
  80. Affected versionversion=8.2.161.0
  81. Affected versionversion=8.2.163.0
  82. Affected versionversion=8.2.164.0
  83. Affected versionversion=8.2.166.0
  84. Affected versionversion=8.2.170.0
  85. Affected versionversion=8.3.102.0
  86. Affected versionversion=8.3.104.14
  87. Affected versionversion=8.3.104.37
  88. Affected versionversion=8.3.104.46
  89. Affected versionversion=8.3.104.64
  90. Affected versionversion=8.3.108.0
  91. Affected versionversion=8.3.111.0
  92. Affected versionversion=8.3.112.0
  93. Affected versionversion=8.3.121.0
  94. Affected versionversion=8.3.122.0
  95. Affected versionversion=8.3.130.0
  96. Affected versionversion=8.3.131.0
  97. Affected versionversion=8.3.132.0
  98. Affected versionversion=8.3.133.0
  99. Affected versionversion=8.3.135.0
  100. Affected versionversion=8.3.140.0
  101. Affected versionversion=8.3.141.0
  102. Affected versionversion=8.3.143.0
  103. Affected versionversion=8.3.150.0
  104. Affected versionversion=8.3.15.117
  105. Affected versionversion=8.3.15.118
  106. Affected versionversion=8.3.15.120
  107. Affected versionversion=8.3.15.142
  108. Affected versionversion=8.3.15.158
  109. Affected versionversion=8.3.15.165
  110. Affected versionversion=8.3.15.169
  111. Affected versionversion=8.3.15.25
  112. Affected versionversion=8.3.200.200
  113. Affected versionversion=8.3.90.11
  114. Affected versionversion=8.3.90.25
  115. Affected versionversion=8.3.90.36
  116. Affected versionversion=8.3.90.53
  117. Affected versionversion=8.3.90.58
  118. Affected versionversion=8.4.100.0
  119. Affected versionversion=8.4.1.142
  120. Affected versionversion=8.4.1.175
  121. Affected versionversion=8.4.1.199
  122. Affected versionversion=8.4.1.218
  123. Affected versionversion=8.4.1.91
  124. Affected versionversion=8.4.1.92
  125. Affected versionversion=8.5.100.0
  126. Affected versionversion=8.5.101.0
  127. Affected versionversion=8.5.102.0
  128. Affected versionversion=8.5.103.0
  129. Affected versionversion=8.5.105.0
  130. Affected versionversion=8.5.110.0
  131. Affected versionversion=8.5.120.0
  132. Affected versionversion=8.5.131.0
  133. Affected versionversion=8.5.135.0
  134. Affected versionversion=8.5.140.0
  135. Affected versionversion=8.5.151.0
  136. Affected versionversion=8.5.160.0
  137. Affected versionversion=8.5.161.0
  138. Affected versionversion=8.5.164.0
  139. Affected versionversion=8.5.171.0
  140. Affected versionversion=8.5.182.0
  141. Affected versionversion=8.6.101.0
  142. Affected versionversion=8.6.1.70
  143. Affected versionversion=8.6.1.71
  144. Affected versionversion=8.6.1.84
  145. Affected versionversion=8.7.102.0
  146. Affected versionversion=8.7.106.0
  147. Affected versionversion=8.7.1.16
  148. Affected versionversion=8.8.100.0
  149. Affected versionversion=8.8.111.0
  150. Affected versionversion=8.8.120.0
  151. Affected versionversion=8.8.125.0
  152. Affected versionversion=8.8.130.0
  153. Affected versionversion=8.9.100.0
  154. Affected versionversion=8.9.111.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco Aironet Access Point Software (IOS XE Controller)version=16.10.1; version=16.10.1e; version=16.11.1; version=16.11.1a; version=16.11.1b; version=16.11.1c; version=16.12.1; version=16.12.1s; version=16.12.1t; version=16.12.2s; version=16.12.3; version=16.12.4; version=16.12.4a; version=16.12.5; version=16.12.6; version=16.12.6a; version=16.12.7; version=16.12.8; version=17.10.1; version=17.1.1; version=17.11.1; version=17.1.1s; version=17.1.1t; version=17.12.1; version=17.2.1; version=17.2.1a; version=17.2.2; version=17.2.3; version=17.3.1; version=17.3.2; version=17.3.2a; version=17.3.3; version=17.3.4; version=17.3.4c; version=17.3.5; version=17.3.5a; version=17.3.5b; version=17.3.6; version=17.4.1; version=17.4.2; version=17.5.1; version=17.6.1; version=17.6.2; version=17.6.3; version=17.6.4; version=17.6.5; version=17.7.1; version=17.8.1; version=17.9.1; version=17.9.2; version=17.9.3; version=17.9.4; version=17.9.4a; version=8.10.111.0; version=8.10.112.0; version=8.10.113.0; version=8.10.121.0; version=8.10.122.0; version=8.10.130.0; version=8.10.141.0; version=8.10.142.0; version=8.10.150.0; version=8.10.151.0; version=8.10.161.0; version=8.10.162.0; version=8.10.170.0; version=8.10.171.0; version=8.10.181.0; version=8.10.182.0; version=8.10.183.0; version=8.10.185.0; version=8.2\(100.0\); version=8.2.110.0; version=8.2.111.0; version=8.2.121.0; version=8.2\(130.0\); version=8.2.141.0; version=8.2.151.0; version=8.2.160.0; version=8.2.161.0; version=8.2.163.0; version=8.2.164.0; version=8.2.166.0; version=8.2.170.0; version=8.3.102.0; version=8.3.104.14; version=8.3.104.37; version=8.3.104.46; version=8.3.104.64; version=8.3.108.0; version=8.3.111.0; version=8.3.112.0; version=8.3.121.0; version=8.3.122.0; version=8.3.130.0; version=8.3.131.0; version=8.3.132.0; version=8.3.133.0; version=8.3.135.0; version=8.3.140.0; version=8.3.141.0; version=8.3.143.0; version=8.3.150.0; version=8.3.15.117; version=8.3.15.118; version=8.3.15.120; version=8.3.15.142; version=8.3.15.158; version=8.3.15.165; version=8.3.15.169; version=8.3.15.25; version=8.3.200.200; version=8.3.90.11; version=8.3.90.25; version=8.3.90.36; version=8.3.90.53; version=8.3.90.58; version=8.4.100.0; version=8.4.1.142; version=8.4.1.175; version=8.4.1.199; version=8.4.1.218; version=8.4.1.91; version=8.4.1.92; version=8.5.100.0; version=8.5.101.0; version=8.5.102.0; version=8.5.103.0; version=8.5.105.0; version=8.5.110.0; version=8.5.120.0; version=8.5.131.0; version=8.5.135.0; version=8.5.140.0; version=8.5.151.0; version=8.5.160.0; version=8.5.161.0; version=8.5.164.0; version=8.5.171.0; version=8.5.182.0; version=8.6.101.0; version=8.6.1.70; version=8.6.1.71; version=8.6.1.84; version=8.7.102.0; version=8.7.106.0; version=8.7.1.16; version=8.8.100.0; version=8.8.111.0; version=8.8.120.0; version=8.8.125.0; version=8.8.130.0; version=8.9.100.0; version=8.9.111.0
ClamAV · Cisco Aironet Access Point Softwareversion=8.10.105.0; version=8.10.111.0; version=8.10.112.0; version=8.10.113.0; version=8.10.121.0; version=8.10.122.0; version=8.10.130.0; version=8.10.141.0; version=8.10.142.0; version=8.10.150.0; version=8.10.151.0; version=8.10.161.0; version=8.10.162.0; version=8.10.170.0; version=8.10.171.0; version=8.10.181.0; version=8.10.182.0; version=8.10.183.0; version=8.10.185.0; version=8.2.100.0; version=8.2.110.0; version=8.2.111.0; version=8.2.121.0; version=8.2.130.0; version=8.2.141.0; version=8.2.151.0; version=8.2.160.0; version=8.2.161.0; version=8.2.163.0; version=8.2.164.0; version=8.2.166.0; version=8.2.170.0; version=8.3.102.0; version=8.3.104.14; version=8.3.104.37; version=8.3.104.46; version=8.3.104.64; version=8.3.108.0; version=8.3.111.0; version=8.3.112.0; version=8.3.121.0; version=8.3.122.0; version=8.3.130.0; version=8.3.131.0; version=8.3.132.0; version=8.3.133.0; version=8.3.135.0; version=8.3.140.0; version=8.3.141.0; version=8.3.143.0; version=8.3.150.0; version=8.3.15.117; version=8.3.15.118; version=8.3.15.120; version=8.3.15.142; version=8.3.15.158; version=8.3.15.165; version=8.3.15.169; version=8.3.15.25; version=8.3.200.200; version=8.3.90.11; version=8.3.90.25; version=8.3.90.36; version=8.3.90.53; version=8.3.90.58; version=8.4.100.0; version=8.4.1.142; version=8.4.1.175; version=8.4.1.199; version=8.4.1.218; version=8.4.1.91; version=8.4.1.92; version=8.5.100.0; version=8.5.101.0; version=8.5.102.0; version=8.5.103.0; version=8.5.105.0; version=8.5.110.0; version=8.5.120.0; version=8.5.131.0; version=8.5.135.0; version=8.5.140.0; version=8.5.151.0; version=8.5.160.0; version=8.5.161.0; version=8.5.164.0; version=8.5.171.0; version=8.5.182.0; version=8.5.182.11 ME; version=8.6.101.0; version=8.6.1.70; version=8.6.1.71; version=8.6.1.84; version=8.7.102.0; version=8.7.106.0; version=8.7.1.16; version=8.8.100.0; version=8.8.111.0; version=8.8.120.0; version=8.8.125.0; version=8.8.130.0; version=8.9.100.0; version=8.9.111.0
ClamAV · Cisco Business Wireless Access Point Softwareversion=1.0.0.10; version=10.0.1.0; version=1.0.0.12; version=1.0.0.13; version=1.0.0.14; version=1.0.0.15; version=1.0.0.16; version=1.0.0.17; version=10.0.2.0; version=1.0.0.3; version=1.0.0.39; version=1.0.0.4; version=1.0.0.5; version=1.0.0.7; version=1.0.0.9; version=1.0.1.10; version=10.1.1.0; version=1.0.1.11; version=1.0.1.12; version=1.0.1.2; version=10.1.2.0; version=1.0.1.3; version=1.0.1.4; version=1.0.1.5; version=1.0.1.6; version=1.0.1.7; version=1.0.1.9; version=1.0.2.0; version=10.2.1.0; version=1.0.2.13; version=1.0.2.14; version=1.0.2.15; version=1.0.2.16; version=1.0.2.17; version=1.0.2.2; version=10.2.2.0; version=1.0.2.3; version=1.0.2.6; version=1.0.2.8; version=1.0.3.1; version=10.3.1.0; version=10.3.1.1; version=10.3.2.0; version=1.0.3.4; version=10.4.1.0; version=1.0.4.2; version=10.4.2.0; version=1.0.4.3; version=1.0.4.4; version=1.0.5.0; version=10.5.2.0; version=1.0.5.3; version=10.6.1.0; version=1.0.6.2; version=1.0.6.5; version=1.0.6.6; version=1.0.6.7; version=1.0.6.8; version=10.7.1.0; version=10.8.1.0; version=1.1.0.3; version=1.1.0.4; version=1.1.0.5; version=1.1.0.6; version=1.1.0.7; version=1.1.0.9; version=1.1.1.0; version=1.1.2.3; version=1.1.2.4; version=1.1.3.2; version=1.1.4.0; version=1.1.4.6; version=1.2.0.2; version=1.2.0.3; version=1.2.1.3; version=1.3.0.3; version=1.3.0.4; version=1.3.0.6; version=1.3.0.7

Published CVSS scores

8.6CiscoCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499Endpoint 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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