CVE-2026-20008

Root code execution via unsanitized CLI parameters

Published Mar 4, 2026 · Updated Mar 4, 2026

Lua code injection in Cisco Secure Firewall ASA and Threat Defense Software allows local users to execute arbitrary code as root. A small subset of CLI commands passes malicious parameter input into Lua without proper sanitization, allowing supplied Lua statements to reach the underlying operating system. Exploitation requires valid Administrator credentials and local CLI access; successful injection grants root-level execution without reported service interruption.

CVSS severity6.0
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Lua code injection in Cisco Secure Firewall ASA and Threat Defense Software allows local users to execute arbitrary code as root. A small subset of CLI commands passes malicious parameter input into Lua without proper sanitization, allowing supplied Lua statements to reach the underlying operating system. Exploitation requires valid Administrator credentials and local CLI access; successful injection grants root-level execution without reported service interruption.

The record

CVE
CVE-2026-20008
Published
Mar 4, 2026
Updated
Mar 4, 2026
Vendor
ClamAV
Product
Cisco Adaptive Security Appliance (ASA) Software
Classifications
CWE-78, T1059.008
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Mar 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 4, 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=9.12.4.62
  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=9.16.1
  44. Affected versionversion=9.16.1.28
  45. Affected versionversion=9.16.2
  46. Affected versionversion=9.16.2.11
  47. Affected versionversion=9.16.2.13
  48. Affected versionversion=9.16.2.14
  49. Affected versionversion=9.16.2.3
  50. Affected versionversion=9.16.2.7
  51. Affected versionversion=9.16.3
  52. Affected versionversion=9.16.3.14
  53. Affected versionversion=9.16.3.15
  54. Affected versionversion=9.16.3.19
  55. Affected versionversion=9.16.3.23
  56. Affected versionversion=9.16.3.3
  57. Affected versionversion=9.16.4
  58. Affected versionversion=9.16.4.14
  59. Affected versionversion=9.16.4.19
  60. Affected versionversion=9.16.4.27
  61. Affected versionversion=9.16.4.38
  62. Affected versionversion=9.16.4.39
  63. Affected versionversion=9.16.4.42
  64. Affected versionversion=9.16.4.48
  65. Affected versionversion=9.16.4.55
  66. Affected versionversion=9.16.4.57
  67. Affected versionversion=9.16.4.61
  68. Affected versionversion=9.16.4.62
  69. Affected versionversion=9.16.4.67
  70. Affected versionversion=9.16.4.70
  71. Affected versionversion=9.16.4.71
  72. Affected versionversion=9.16.4.76
  73. Affected versionversion=9.16.4.82
  74. Affected versionversion=9.16.4.84
  75. Affected versionversion=9.16.4.9
  76. Affected versionversion=9.17.1
  77. Affected versionversion=9.17.1.10
  78. Affected versionversion=9.17.1.11
  79. Affected versionversion=9.17.1.13
  80. Affected versionversion=9.17.1.15
  81. Affected versionversion=9.17.1.20
  82. Affected versionversion=9.17.1.30
  83. Affected versionversion=9.17.1.33
  84. Affected versionversion=9.17.1.39
  85. Affected versionversion=9.17.1.45
  86. Affected versionversion=9.17.1.46
  87. Affected versionversion=9.17.1.7
  88. Affected versionversion=9.17.1.9
  89. Affected versionversion=9.18.1
  90. Affected versionversion=9.18.1.3
  91. Affected versionversion=9.18.2
  92. Affected versionversion=9.18.2.5
  93. Affected versionversion=9.18.2.7
  94. Affected versionversion=9.18.2.8
  95. Affected versionversion=9.18.3
  96. Affected versionversion=9.18.3.39
  97. Affected versionversion=9.18.3.46
  98. Affected versionversion=9.18.3.53
  99. Affected versionversion=9.18.3.55
  100. Affected versionversion=9.18.3.56
  101. Affected versionversion=9.18.4
  102. Affected versionversion=9.18.4.22
  103. Affected versionversion=9.18.4.24
  104. Affected versionversion=9.18.4.29
  105. Affected versionversion=9.18.4.34
  106. Affected versionversion=9.18.4.40
  107. Affected versionversion=9.18.4.47
  108. Affected versionversion=9.18.4.5
  109. Affected versionversion=9.18.4.50
  110. Affected versionversion=9.18.4.52
  111. Affected versionversion=9.18.4.53
  112. Affected versionversion=9.18.4.57
  113. Affected versionversion=9.18.4.8
  114. Affected versionversion=9.19.1
  115. Affected versionversion=9.19.1.12
  116. Affected versionversion=9.19.1.18
  117. Affected versionversion=9.19.1.22
  118. Affected versionversion=9.19.1.24
  119. Affected versionversion=9.19.1.27
  120. Affected versionversion=9.19.1.28
  121. Affected versionversion=9.19.1.31
  122. Affected versionversion=9.19.1.37
  123. Affected versionversion=9.19.1.38
  124. Affected versionversion=9.19.1.42
  125. Affected versionversion=9.19.1.5
  126. Affected versionversion=9.19.1.9
  127. Affected versionversion=9.20.1
  128. Affected versionversion=9.20.1.5
  129. Affected versionversion=9.20.2
  130. Affected versionversion=9.20.2.10
  131. Affected versionversion=9.20.2.21
  132. Affected versionversion=9.20.2.22
  133. Affected versionversion=9.20.3
  134. Affected versionversion=9.20.3.10
  135. Affected versionversion=9.20.3.13
  136. Affected versionversion=9.20.3.16
  137. Affected versionversion=9.20.3.20
  138. Affected versionversion=9.20.3.4
  139. Affected versionversion=9.20.3.7
  140. Affected versionversion=9.20.3.9
  141. Affected versionversion=9.22.1.1
  142. Affected versionversion=9.22.1.2
  143. Affected versionversion=9.22.1.3
  144. Affected versionversion=9.22.1.6
  145. Affected versionversion=9.22.2
  146. Affected versionversion=9.23.1
  147. Affected versionversion=9.23.1.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

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=9.16.1; 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=9.16.4.19; 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=9.16.4.84; 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=9.18.4.57; 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=9.19.1.42; 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=9.20.3.16; version=9.20.3.20; 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=9.22.2; version=9.23.1; version=9.23.1.3
ClamAV · Cisco Secure Firewall Threat Defenseversion=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=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=7.0.8; version=7.0.8.1; 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=7.2.10; version=7.2.10.2; 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=7.4.2.3; version=7.4.2.4; version=7.6.0; version=7.6.1; version=7.6.2; version=7.6.2.1; version=7.7.0; version=7.7.10; version=7.7.10.1

Published CVSS scores

6.0CiscoCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.008Network Device CLI

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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