CVE-2026-20083: A vulnerability in the Secure Copy Protocol (SCP) server feature of Cisco I

Description

A vulnerability in the Secure Copy Protocol (SCP) server feature of Cisco IOS XE Software could allow an authenticated, local attacker with low privileges to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of a malformed SCP request. An attacker could exploit this vulnerability by issuing a crafted command through SSH. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Cisco Cisco IOS XE Software

3.5.0Eaffected
3.5.1Eaffected
3.5.2Eaffected
3.5.3Eaffected
3.11.1Saffected
3.11.2Saffected
3.11.0Saffected
3.11.3Saffected
3.11.4Saffected
3.12.0Saffected
3.12.1Saffected
3.12.2Saffected
3.12.3Saffected
3.12.0aSaffected
3.12.4Saffected
3.13.0Saffected
3.13.1Saffected
3.13.2Saffected
3.13.3Saffected
3.13.4Saffected
3.13.5Saffected
3.13.2aSaffected
3.13.0aSaffected
3.13.5aSaffected
3.13.6Saffected
3.13.7Saffected
3.13.6aSaffected
3.6.0Eaffected
3.6.1Eaffected
3.6.2aEaffected
3.6.2Eaffected
3.6.3Eaffected
3.6.4Eaffected
3.6.5Eaffected
3.6.6Eaffected
3.6.5aEaffected
3.14.0Saffected
3.14.1Saffected
3.14.2Saffected
3.14.3Saffected
3.14.4Saffected
3.15.0Saffected
3.15.1Saffected
3.15.2Saffected
3.15.1cSaffected
3.15.3Saffected
3.15.4Saffected
3.7.0Eaffected
3.7.1Eaffected
3.7.2Eaffected
3.7.3Eaffected
3.7.4Eaffected
3.7.5Eaffected
3.16.0Saffected
3.16.1Saffected
3.16.1aSaffected
3.16.2Saffected
3.16.2aSaffected
3.16.0cSaffected
3.16.3Saffected
3.16.2bSaffected
3.16.3aSaffected
3.16.4Saffected
3.16.4aSaffected
3.16.4bSaffected
3.16.5Saffected
3.16.4dSaffected
3.17.0Saffected
3.17.1Saffected
3.17.2Saffected
3.17.1aSaffected
3.17.3Saffected
3.8.0Eaffected
3.8.1Eaffected
3.8.2Eaffected
3.8.3Eaffected
3.18.0aSaffected
3.18.0Saffected
3.18.1Saffected
3.18.2Saffected
3.18.0SPaffected
3.18.1SPaffected
3.18.1aSPaffected
3.18.1bSPaffected
3.18.1cSPaffected
3.9.0Eaffected
3.9.1Eaffected
16.6.1affected
16.6.2affected
16.6.3affected
16.6.4affected
16.6.5affected
16.6.4aaffected
16.6.5aaffected
16.6.6affected
16.6.7affected
16.6.8affected
16.6.9affected
16.6.10affected
16.7.1affected
16.7.1aaffected
16.7.1baffected
16.7.2affected
16.7.3affected
16.7.4affected
16.8.1affected
16.8.1aaffected
16.8.1baffected
16.8.1saffected
16.8.1caffected
16.8.1daffected
16.8.2affected
16.8.1eaffected
16.8.3affected
16.9.1affected
16.9.2affected
16.9.1aaffected
16.9.1baffected
16.9.1saffected
16.9.3affected
16.9.4affected
16.9.3aaffected
16.9.5affected
16.9.5faffected
16.9.6affected
16.9.7affected
16.9.8affected
16.10.1affected
16.10.1aaffected
16.10.1baffected
16.10.1saffected
16.10.1caffected
16.10.1eaffected
16.10.1daffected
16.10.2affected
16.10.1faffected
16.10.1gaffected
16.10.3affected
16.11.1affected
16.11.1aaffected
16.11.1baffected
16.11.2affected
16.11.1saffected
16.12.1affected
16.12.1saffected
16.12.1aaffected
16.12.1caffected
16.12.1waffected
16.12.2affected
16.12.1yaffected
16.12.2aaffected
16.12.3affected
16.12.8affected
16.12.2saffected
16.12.1xaffected
16.12.1taffected
16.12.4affected
16.12.3saffected
16.12.3aaffected
16.12.4aaffected
16.12.5affected
16.12.6affected
16.12.1z1affected
16.12.5aaffected
16.12.5baffected
16.12.1z2affected
16.12.6aaffected
16.12.7affected
16.12.9affected
16.12.10affected
16.12.10aaffected
16.12.11affected
16.12.12affected
16.12.13affected
16.12.14affected
17.1.1affected
17.1.1aaffected
17.1.1saffected
17.1.1taffected
17.1.3affected
17.2.1affected
17.2.1raffected
17.2.1aaffected
17.2.1vaffected
17.2.2affected
17.2.3affected
17.3.1affected
17.3.2affected
17.3.3affected
17.3.1aaffected
17.3.1waffected
17.3.2aaffected
17.3.1xaffected
17.3.1zaffected
17.3.4affected
17.3.5affected
17.3.4aaffected
17.3.6affected
17.3.4baffected
17.3.4caffected
17.3.5aaffected
17.3.5baffected
17.3.7affected
17.3.8affected
17.3.8aaffected
17.4.1affected
17.4.2affected
17.4.1aaffected
17.4.1baffected
17.4.2aaffected
17.5.1affected
17.5.1aaffected
17.6.1affected
17.6.2affected
17.6.1waffected
17.6.1aaffected
17.6.1xaffected
17.6.3affected
17.6.1yaffected
17.6.1zaffected
17.6.3aaffected
17.6.4affected
17.6.1z1affected
17.6.5affected
17.6.6affected
17.6.6aaffected
17.6.5aaffected
17.6.7affected
17.6.8affected
17.6.8aaffected
17.7.1affected
17.7.1aaffected
17.7.1baffected
17.7.2affected
17.10.1affected
17.10.1aaffected
17.10.1baffected
17.8.1affected
17.8.1aaffected
17.9.1affected
17.9.1waffected
17.9.2affected
17.9.1aaffected
17.9.1xaffected
17.9.1yaffected
17.9.3affected
17.9.2aaffected
17.9.1x1affected
17.9.3aaffected
17.9.4affected
17.9.1y1affected
17.9.5affected
17.9.4aaffected
17.9.5aaffected
17.9.5baffected
17.9.6affected
17.9.6aaffected
17.9.7affected
17.9.5eaffected
17.9.5faffected
17.9.8affected
17.9.7aaffected
17.9.7baffected
17.11.1affected
17.11.1aaffected
17.12.1affected
17.12.1waffected
17.12.1aaffected
17.12.1xaffected
17.12.2affected
17.12.3affected
17.12.2aaffected
17.12.1yaffected
17.12.1zaffected
17.12.4affected
17.12.3aaffected
17.12.1z1affected
17.12.1z2affected
17.12.4aaffected
17.12.5affected
17.12.4baffected
17.12.1z3affected
17.12.5aaffected
17.12.1z4affected
17.12.6affected
17.12.5baffected
17.12.5caffected
17.12.6aaffected
17.12.5daffected
17.12.6baffected
17.13.1affected
17.13.1aaffected
17.14.1affected
17.14.1aaffected
17.15.1affected
17.15.1waffected
17.15.1aaffected
17.15.2affected
17.15.1baffected
17.15.1xaffected
17.15.1zaffected
17.15.3affected
17.15.2caffected
17.15.2aaffected
17.15.1yaffected
17.15.2baffected
17.15.3aaffected
17.15.4affected
17.15.3baffected
17.15.4daffected
17.15.4eaffected
17.16.1affected
17.16.1aaffected
17.17.1affected
17.18.1affected
17.18.1waffected
17.18.1aaffected

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-scp-dos-duAdXtCg ↗