CISCO-CVE-2026-20074

HIGH7.4

Cisco IOS XR Software Multi-Instance Intermediate System-to-Intermediate System Denial of Service Vulnerability

Published Mar 11, 2026

Modified 1 months ago

Affected Packages

Cisco IOS XR

CiscoIOSXR

Affected versions:

24.1.124.1.224.2.124.2.1124.2.224.2.2024.2.2124.3.124.3.224.3.20+22 more

CVSS Analysis

CVSS v3.1

7.4

Exploitability

Attack Vector

AdjacentAV:A

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

ChangedS:C

Impact

Confidentiality

NoneC:N

Integrity

NoneI:N

Availability

HighA:H

7.4/CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Upstream

Ecosystems

Timeline

PublishedMar 11, 2026

ModifiedMar 11, 2026