CVE-2026-20083 — Cisco / Cisco IOS XE Software

Description (CNA)

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 (CNA)

Vendor / product	Versions
Cisco / Cisco IOS XE Software	affected 3.5.0E; affected 3.5.1E; affected 3.5.2E; affected 3.5.3E; affected 3.11.1S; affected 3.11.2S; affected 3.11.0S; affected 3.11.3S; affected 3.11.4S; affected 3.12.0S; affected 3.12.1S; affected 3.12.2S; affected 3.12.3S; affected 3.12.0aS; affected 3.12.4S; affected 3.13.0S; affected 3.13.1S; affected 3.13.2S; affected 3.13.3S; affected 3.13.4S; affected 3.13.5S; affected 3.13.2aS; affected 3.13.0aS; affected 3.13.5aS; affected 3.13.6S; affected 3.13.7S; affected 3.13.6aS; affected 3.6.0E; affected 3.6.1E; affected 3.6.2aE; affected 3.6.2E; affected 3.6.3E; affected 3.6.4E; affected 3.6.5E; affected 3.6.6E; affected 3.6.5aE; affected 3.14.0S; affected 3.14.1S; affected 3.14.2S; affected 3.14.3S; affected 3.14.4S; affected 3.15.0S; affected 3.15.1S; affected 3.15.2S; affected 3.15.1cS; affected 3.15.3S; affected 3.15.4S; affected 3.7.0E; affected 3.7.1E; affected 3.7.2E; affected 3.7.3E; affected 3.7.4E; affected 3.7.5E; affected 3.16.0S; affected 3.16.1S; affected 3.16.1aS; affected 3.16.2S; affected 3.16.2aS; affected 3.16.0cS; affected 3.16.3S; affected 3.16.2bS; affected 3.16.3aS; affected 3.16.4S; affected 3.16.4aS; affected 3.16.4bS; affected 3.16.5S; affected 3.16.4dS; affected 3.17.0S; affected 3.17.1S; affected 3.17.2S; affected 3.17.1aS; affected 3.17.3S; affected 3.8.0E; affected 3.8.1E; affected 3.8.2E; affected 3.8.3E; affected 3.18.0aS; affected 3.18.0S; affected 3.18.1S; affected 3.18.2S; affected 3.18.0SP; affected 3.18.1SP; affected 3.18.1aSP; affected 3.18.1bSP; affected 3.18.1cSP; affected 3.9.0E; affected 3.9.1E; affected 16.6.1; affected 16.6.2; affected 16.6.3; affected 16.6.4; affected 16.6.5; affected 16.6.4a; affected 16.6.5a; affected 16.6.6; affected 16.6.7; affected 16.6.8; affected 16.6.9; affected 16.6.10; affected 16.7.1; affected 16.7.1a; affected 16.7.1b; affected 16.7.2; affected 16.7.3; affected 16.7.4; affected 16.8.1; affected 16.8.1a; affected 16.8.1b; affected 16.8.1s; affected 16.8.1c; affected 16.8.1d; affected 16.8.2; affected 16.8.1e; affected 16.8.3; affected 16.9.1; affected 16.9.2; affected 16.9.1a; affected 16.9.1b; affected 16.9.1s; affected 16.9.3; affected 16.9.4; affected 16.9.3a; affected 16.9.5; affected 16.9.5f; affected 16.9.6; affected 16.9.7; affected 16.9.8; affected 16.10.1; affected 16.10.1a; affected 16.10.1b; affected 16.10.1s; affected 16.10.1c; affected 16.10.1e; affected 16.10.1d; affected 16.10.2; affected 16.10.1f; affected 16.10.1g; affected 16.10.3; affected 16.11.1; affected 16.11.1a; affected 16.11.1b; affected 16.11.2; affected 16.11.1s; affected 16.12.1; affected 16.12.1s; affected 16.12.1a; affected 16.12.1c; affected 16.12.1w; affected 16.12.2; affected 16.12.1y; affected 16.12.2a; affected 16.12.3; affected 16.12.8; affected 16.12.2s; affected 16.12.1x; affected 16.12.1t; affected 16.12.4; affected 16.12.3s; affected 16.12.3a; affected 16.12.4a; affected 16.12.5; affected 16.12.6; affected 16.12.1z1; affected 16.12.5a; affected 16.12.5b; affected 16.12.1z2; affected 16.12.6a; affected 16.12.7; affected 16.12.9; affected 16.12.10; affected 16.12.10a; affected 16.12.11; affected 16.12.12; affected 16.12.13; affected 16.12.14; affected 17.1.1; affected 17.1.1a; affected 17.1.1s; affected 17.1.1t; affected 17.1.3; affected 17.2.1; affected 17.2.1r; affected 17.2.1a; affected 17.2.1v; affected 17.2.2; affected 17.2.3; affected 17.3.1; affected 17.3.2; affected 17.3.3; affected 17.3.1a; affected 17.3.1w; affected 17.3.2a; affected 17.3.1x; affected 17.3.1z; affected 17.3.4; affected 17.3.5; affected 17.3.4a; affected 17.3.6; affected 17.3.4b; affected 17.3.4c; affected 17.3.5a; affected 17.3.5b; affected 17.3.7; affected 17.3.8; affected 17.3.8a; affected 17.4.1; affected 17.4.2; affected 17.4.1a; affected 17.4.1b; affected 17.4.2a; affected 17.5.1; affected 17.5.1a; affected 17.6.1; affected 17.6.2; affected 17.6.1w; affected 17.6.1a; affected 17.6.1x; affected 17.6.3; affected 17.6.1y; affected 17.6.1z; affected 17.6.3a; affected 17.6.4; affected 17.6.1z1; affected 17.6.5; affected 17.6.6; affected 17.6.6a; affected 17.6.5a; affected 17.6.7; affected 17.6.8; affected 17.6.8a; affected 17.7.1; affected 17.7.1a; affected 17.7.1b; affected 17.7.2; affected 17.10.1; affected 17.10.1a; affected 17.10.1b; affected 17.8.1; affected 17.8.1a; affected 17.9.1; affected 17.9.1w; affected 17.9.2; affected 17.9.1a; affected 17.9.1x; affected 17.9.1y; affected 17.9.3; affected 17.9.2a; affected 17.9.1x1; affected 17.9.3a; affected 17.9.4; affected 17.9.1y1; affected 17.9.5; affected 17.9.4a; affected 17.9.5a; affected 17.9.5b; affected 17.9.6; affected 17.9.6a; affected 17.9.7; affected 17.9.5e; affected 17.9.5f; affected 17.9.8; affected 17.9.7a; affected 17.9.7b; affected 17.11.1; affected 17.11.1a; affected 17.12.1; affected 17.12.1w; affected 17.12.1a; affected 17.12.1x; affected 17.12.2; affected 17.12.3; affected 17.12.2a; affected 17.12.1y; affected 17.12.1z; affected 17.12.4; affected 17.12.3a; affected 17.12.1z1; affected 17.12.1z2; affected 17.12.4a; affected 17.12.5; affected 17.12.4b; affected 17.12.1z3; affected 17.12.5a; affected 17.12.1z4; affected 17.12.6; affected 17.12.5b; affected 17.12.5c; affected 17.12.6a; affected 17.12.5d; affected 17.12.6b; affected 17.13.1; affected 17.13.1a; affected 17.14.1; affected 17.14.1a; affected 17.15.1; affected 17.15.1w; affected 17.15.1a; affected 17.15.2; affected 17.15.1b; affected 17.15.1x; affected 17.15.1z; affected 17.15.3; affected 17.15.2c; affected 17.15.2a; affected 17.15.1y; affected 17.15.2b; affected 17.15.3a; affected 17.15.4; affected 17.15.3b; affected 17.15.4d; affected 17.15.4e; affected 17.16.1; affected 17.16.1a; affected 17.17.1; affected 17.18.1; affected 17.18.1w; affected 17.18.1a

Vendor / product

Versions

Cisco / Cisco IOS XE Software

affected 3.5.0E; affected 3.5.1E; affected 3.5.2E; affected 3.5.3E; affected 3.11.1S; affected 3.11.2S; affected 3.11.0S; affected 3.11.3S; affected 3.11.4S; affected 3.12.0S; affected 3.12.1S; affected 3.12.2S; affected 3.12.3S; affected 3.12.0aS; affected 3.12.4S; affected 3.13.0S; affected 3.13.1S; affected 3.13.2S; affected 3.13.3S; affected 3.13.4S; affected 3.13.5S; affected 3.13.2aS; affected 3.13.0aS; affected 3.13.5aS; affected 3.13.6S; affected 3.13.7S; affected 3.13.6aS; affected 3.6.0E; affected 3.6.1E; affected 3.6.2aE; affected 3.6.2E; affected 3.6.3E; affected 3.6.4E; affected 3.6.5E; affected 3.6.6E; affected 3.6.5aE; affected 3.14.0S; affected 3.14.1S; affected 3.14.2S; affected 3.14.3S; affected 3.14.4S; affected 3.15.0S; affected 3.15.1S; affected 3.15.2S; affected 3.15.1cS; affected 3.15.3S; affected 3.15.4S; affected 3.7.0E; affected 3.7.1E; affected 3.7.2E; affected 3.7.3E; affected 3.7.4E; affected 3.7.5E; affected 3.16.0S; affected 3.16.1S; affected 3.16.1aS; affected 3.16.2S; affected 3.16.2aS; affected 3.16.0cS; affected 3.16.3S; affected 3.16.2bS; affected 3.16.3aS; affected 3.16.4S; affected 3.16.4aS; affected 3.16.4bS; affected 3.16.5S; affected 3.16.4dS; affected 3.17.0S; affected 3.17.1S; affected 3.17.2S; affected 3.17.1aS; affected 3.17.3S; affected 3.8.0E; affected 3.8.1E; affected 3.8.2E; affected 3.8.3E; affected 3.18.0aS; affected 3.18.0S; affected 3.18.1S; affected 3.18.2S; affected 3.18.0SP; affected 3.18.1SP; affected 3.18.1aSP; affected 3.18.1bSP; affected 3.18.1cSP; affected 3.9.0E; affected 3.9.1E; affected 16.6.1; affected 16.6.2; affected 16.6.3; affected 16.6.4; affected 16.6.5; affected 16.6.4a; affected 16.6.5a; affected 16.6.6; affected 16.6.7; affected 16.6.8; affected 16.6.9; affected 16.6.10; affected 16.7.1; affected 16.7.1a; affected 16.7.1b; affected 16.7.2; affected 16.7.3; affected 16.7.4; affected 16.8.1; affected 16.8.1a; affected 16.8.1b; affected 16.8.1s; affected 16.8.1c; affected 16.8.1d; affected 16.8.2; affected 16.8.1e; affected 16.8.3; affected 16.9.1; affected 16.9.2; affected 16.9.1a; affected 16.9.1b; affected 16.9.1s; affected 16.9.3; affected 16.9.4; affected 16.9.3a; affected 16.9.5; affected 16.9.5f; affected 16.9.6; affected 16.9.7; affected 16.9.8; affected 16.10.1; affected 16.10.1a; affected 16.10.1b; affected 16.10.1s; affected 16.10.1c; affected 16.10.1e; affected 16.10.1d; affected 16.10.2; affected 16.10.1f; affected 16.10.1g; affected 16.10.3; affected 16.11.1; affected 16.11.1a; affected 16.11.1b; affected 16.11.2; affected 16.11.1s; affected 16.12.1; affected 16.12.1s; affected 16.12.1a; affected 16.12.1c; affected 16.12.1w; affected 16.12.2; affected 16.12.1y; affected 16.12.2a; affected 16.12.3; affected 16.12.8; affected 16.12.2s; affected 16.12.1x; affected 16.12.1t; affected 16.12.4; affected 16.12.3s; affected 16.12.3a; affected 16.12.4a; affected 16.12.5; affected 16.12.6; affected 16.12.1z1; affected 16.12.5a; affected 16.12.5b; affected 16.12.1z2; affected 16.12.6a; affected 16.12.7; affected 16.12.9; affected 16.12.10; affected 16.12.10a; affected 16.12.11; affected 16.12.12; affected 16.12.13; affected 16.12.14; affected 17.1.1; affected 17.1.1a; affected 17.1.1s; affected 17.1.1t; affected 17.1.3; affected 17.2.1; affected 17.2.1r; affected 17.2.1a; affected 17.2.1v; affected 17.2.2; affected 17.2.3; affected 17.3.1; affected 17.3.2; affected 17.3.3; affected 17.3.1a; affected 17.3.1w; affected 17.3.2a; affected 17.3.1x; affected 17.3.1z; affected 17.3.4; affected 17.3.5; affected 17.3.4a; affected 17.3.6; affected 17.3.4b; affected 17.3.4c; affected 17.3.5a; affected 17.3.5b; affected 17.3.7; affected 17.3.8; affected 17.3.8a; affected 17.4.1; affected 17.4.2; affected 17.4.1a; affected 17.4.1b; affected 17.4.2a; affected 17.5.1; affected 17.5.1a; affected 17.6.1; affected 17.6.2; affected 17.6.1w; affected 17.6.1a; affected 17.6.1x; affected 17.6.3; affected 17.6.1y; affected 17.6.1z; affected 17.6.3a; affected 17.6.4; affected 17.6.1z1; affected 17.6.5; affected 17.6.6; affected 17.6.6a; affected 17.6.5a; affected 17.6.7; affected 17.6.8; affected 17.6.8a; affected 17.7.1; affected 17.7.1a; affected 17.7.1b; affected 17.7.2; affected 17.10.1; affected 17.10.1a; affected 17.10.1b; affected 17.8.1; affected 17.8.1a; affected 17.9.1; affected 17.9.1w; affected 17.9.2; affected 17.9.1a; affected 17.9.1x; affected 17.9.1y; affected 17.9.3; affected 17.9.2a; affected 17.9.1x1; affected 17.9.3a; affected 17.9.4; affected 17.9.1y1; affected 17.9.5; affected 17.9.4a; affected 17.9.5a; affected 17.9.5b; affected 17.9.6; affected 17.9.6a; affected 17.9.7; affected 17.9.5e; affected 17.9.5f; affected 17.9.8; affected 17.9.7a; affected 17.9.7b; affected 17.11.1; affected 17.11.1a; affected 17.12.1; affected 17.12.1w; affected 17.12.1a; affected 17.12.1x; affected 17.12.2; affected 17.12.3; affected 17.12.2a; affected 17.12.1y; affected 17.12.1z; affected 17.12.4; affected 17.12.3a; affected 17.12.1z1; affected 17.12.1z2; affected 17.12.4a; affected 17.12.5; affected 17.12.4b; affected 17.12.1z3; affected 17.12.5a; affected 17.12.1z4; affected 17.12.6; affected 17.12.5b; affected 17.12.5c; affected 17.12.6a; affected 17.12.5d; affected 17.12.6b; affected 17.13.1; affected 17.13.1a; affected 17.14.1; affected 17.14.1a; affected 17.15.1; affected 17.15.1w; affected 17.15.1a; affected 17.15.2; affected 17.15.1b; affected 17.15.1x; affected 17.15.1z; affected 17.15.3; affected 17.15.2c; affected 17.15.2a; affected 17.15.1y; affected 17.15.2b; affected 17.15.3a; affected 17.15.4; affected 17.15.3b; affected 17.15.4d; affected 17.15.4e; affected 17.16.1; affected 17.16.1a; affected 17.17.1; affected 17.18.1; affected 17.18.1w; affected 17.18.1a

CWE

CWE-235

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.