#VU123906 Improper cleanup on thrown exception in Cisco IOS XR - CVE-2026-20118

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Main Vulnerability Database Vulnerabilities #VU123906

#VU123906 Improper cleanup on thrown exception in Cisco IOS XR - CVE-2026-20118

Published: March 12, 2026


Vulnerability identifier: #VU123906
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:H/E:U/U:Green
CVE-ID: CVE-2026-20118
CWE-ID: CWE-460
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Cisco IOS XR
Software vendor:
Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to an error when handling Egress Packet Network Interface (EPNI) Aligner interrupt. A remote attacker can send a continuous flow of crafted packets to an interface of the affected device and prevent traffic from traversing the interface.


Remediation

Install updates from vendor's website.

External links