CVE-2026-20083: Cisco IOS XE Software

Medium severity, CVSS 6.5. EPSS: 0.1% chance of exploitation in the next 30 days.

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

• Cisco Cisco IOS XE Software: version 3.5.0E only; version 3.5.1E only; version 3.5.2E only; version 3.5.3E only; version 3.11.1S only; version 3.11.2S only; …

Published 2026-03-25. Last modified 2026-06-17.