CVE-2023-20273Known exploitationNetwork attack vector

Root command execution via web UI input

Published Oct 24, 2023 · Updated Oct 21, 2025

Command injection in the web UI of Cisco IOS XE Software allows remote authenticated users to execute operating-system commands as root. The web UI passes crafted input to the underlying operating system without sufficient validation, allowing injected commands to run with root privileges. Exploitation requires the HTTP or HTTPS web UI to be enabled and an authenticated session; observed attacks used a separate flaw to create that account and then wrote an implant.

CVSS severity7.2
High
EPSS probability89.63%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in the web UI of Cisco IOS XE Software allows remote authenticated users to execute operating-system commands as root. The web UI passes crafted input to the underlying operating system without sufficient validation, allowing injected commands to run with root privileges. Exploitation requires the HTTP or HTTPS web UI to be enabled and an authenticated session; observed attacks used a separate flaw to create that account and then wrote an implant.

The record

CVE
CVE-2023-20273
Published
Oct 24, 2023
Updated
Oct 21, 2025
Vendor
ClamAV
Product
Cisco IOS XE Software
Classifications
CWE-78, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 24, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 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=16.10.1c
  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=16.1.1
  13. Affected versionversion=16.11.1
  14. Affected versionversion=16.11.1a
  15. Affected versionversion=16.11.1b
  16. Affected versionversion=16.11.1s
  17. Affected versionversion=16.11.2
  18. Affected versionversion=16.1.2
  19. Affected versionversion=16.12.1
  20. Affected versionversion=16.12.10
  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=16.1.3
  47. Affected versionversion=16.2.1
  48. Affected versionversion=16.2.2
  49. Affected versionversion=16.3.1
  50. Affected versionversion=16.3.10
  51. Affected versionversion=16.3.11
  52. Affected versionversion=16.3.1a
  53. Affected versionversion=16.3.2
  54. Affected versionversion=16.3.3
  55. Affected versionversion=16.3.4
  56. Affected versionversion=16.3.5
  57. Affected versionversion=16.3.5b
  58. Affected versionversion=16.3.6
  59. Affected versionversion=16.3.7
  60. Affected versionversion=16.3.8
  61. Affected versionversion=16.3.9
  62. Affected versionversion=16.4.1
  63. Affected versionversion=16.4.2
  64. Affected versionversion=16.4.3
  65. Affected versionversion=16.5.1
  66. Affected versionversion=16.5.1a
  67. Affected versionversion=16.5.1b
  68. Affected versionversion=16.5.2
  69. Affected versionversion=16.5.3
  70. Affected versionversion=16.6.1
  71. Affected versionversion=16.6.10
  72. Affected versionversion=16.6.2
  73. Affected versionversion=16.6.3
  74. Affected versionversion=16.6.4
  75. Affected versionversion=16.6.4a
  76. Affected versionversion=16.6.5
  77. Affected versionversion=16.6.5a
  78. Affected versionversion=16.6.6
  79. Affected versionversion=16.6.7
  80. Affected versionversion=16.6.8
  81. Affected versionversion=16.6.9
  82. Affected versionversion=16.7.1
  83. Affected versionversion=16.7.1a
  84. Affected versionversion=16.7.1b
  85. Affected versionversion=16.7.2
  86. Affected versionversion=16.7.3
  87. Affected versionversion=16.7.4
  88. Affected versionversion=16.8.1
  89. Affected versionversion=16.8.1a
  90. Affected versionversion=16.8.1b
  91. Affected versionversion=16.8.1c
  92. Affected versionversion=16.8.1d
  93. Affected versionversion=16.8.1e
  94. Affected versionversion=16.8.1s
  95. Affected versionversion=16.8.2
  96. Affected versionversion=16.8.3
  97. Affected versionversion=16.9.1
  98. Affected versionversion=16.9.1a
  99. Affected versionversion=16.9.1b
  100. Affected versionversion=16.9.1s
  101. Affected versionversion=16.9.2
  102. Affected versionversion=16.9.3
  103. Affected versionversion=16.9.3a
  104. Affected versionversion=16.9.4
  105. Affected versionversion=16.9.5
  106. Affected versionversion=16.9.5f
  107. Affected versionversion=16.9.6
  108. Affected versionversion=16.9.7
  109. Affected versionversion=16.9.8
  110. Affected versionversion=17.10.1
  111. Affected versionversion=17.10.1a
  112. Affected versionversion=17.10.1b
  113. Affected versionversion=17.1.1
  114. Affected versionversion=17.11.1
  115. Affected versionversion=17.11.1a
  116. Affected versionversion=17.11.99SW
  117. Affected versionversion=17.1.1a
  118. Affected versionversion=17.1.1s
  119. Affected versionversion=17.1.1t
  120. Affected versionversion=17.12.1
  121. Affected versionversion=17.12.1a
  122. Affected versionversion=17.1.3
  123. Affected versionversion=17.2.1
  124. Affected versionversion=17.2.1a
  125. Affected versionversion=17.2.1r
  126. Affected versionversion=17.2.1v
  127. Affected versionversion=17.2.2
  128. Affected versionversion=17.2.3
  129. Affected versionversion=17.3.1
  130. Affected versionversion=17.3.1a
  131. Affected versionversion=17.3.1w
  132. Affected versionversion=17.3.1x
  133. Affected versionversion=17.3.1z
  134. Affected versionversion=17.3.2
  135. Affected versionversion=17.3.2a
  136. Affected versionversion=17.3.3
  137. Affected versionversion=17.3.4
  138. Affected versionversion=17.3.4a
  139. Affected versionversion=17.3.4b
  140. Affected versionversion=17.3.4c
  141. Affected versionversion=17.3.5
  142. Affected versionversion=17.3.5a
  143. Affected versionversion=17.3.5b
  144. Affected versionversion=17.3.6
  145. Affected versionversion=17.3.7
  146. Affected versionversion=17.3.8
  147. Affected versionversion=17.4.1
  148. Affected versionversion=17.4.1a
  149. Affected versionversion=17.4.1b
  150. Affected versionversion=17.4.2
  151. Affected versionversion=17.4.2a
  152. Affected versionversion=17.5.1
  153. Affected versionversion=17.5.1a
  154. Affected versionversion=17.5.1b
  155. Affected versionversion=17.5.1c
  156. Affected versionversion=17.6.1
  157. Affected versionversion=17.6.1a
  158. Affected versionversion=17.6.1w
  159. Affected versionversion=17.6.1x
  160. Affected versionversion=17.6.1y
  161. Affected versionversion=17.6.1z
  162. Affected versionversion=17.6.1z1
  163. Affected versionversion=17.6.2
  164. Affected versionversion=17.6.3
  165. Affected versionversion=17.6.3a
  166. Affected versionversion=17.6.4
  167. Affected versionversion=17.6.5
  168. Affected versionversion=17.6.6
  169. Affected versionversion=17.7.1
  170. Affected versionversion=17.7.1a
  171. Affected versionversion=17.7.1b
  172. Affected versionversion=17.7.2
  173. Affected versionversion=17.8.1
  174. Affected versionversion=17.8.1a
  175. Affected versionversion=17.9.1
  176. Affected versionversion=17.9.1a
  177. Affected versionversion=17.9.1w
  178. Affected versionversion=17.9.1x
  179. Affected versionversion=17.9.1x1
  180. Affected versionversion=17.9.1y
  181. Affected versionversion=17.9.1y1
  182. Affected versionversion=17.9.2
  183. Affected versionversion=17.9.2a
  184. Affected versionversion=17.9.3
  185. Affected versionversion=17.9.3a
  186. Affected versionversion=17.9.4

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=16.10.1c; 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=16.1.1; version=16.11.1; version=16.11.1a; version=16.11.1b; version=16.11.1s; version=16.11.2; version=16.1.2; version=16.12.1; version=16.12.10; 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=16.1.3; 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=16.3.5b; 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=17.1.3; 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=17.4.1; 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=17.5.1b; version=17.5.1c; 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=17.6.6; 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

Published CVSS scores

7.2Cisco Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/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 exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

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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