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CVE-2026-20046

Cisco iOS XR vulnerability

8.8 HIGHEPSS 0.14%
  1. Published11 Mar 2026

Description

A vulnerability in task group assignment for a specific CLI command in Cisco IOS XR Software could allow an authenticated, local attacker to elevate privileges and gain full administrative control of an affected device. This vulnerability is due to incorrect mapping of a command to task groups within the source code. An attacker with a low-privileged account could exploit this vulnerability by using the CLI command to bypass the task group–based checks. A successful exploit could allow the attacker to elevate privileges and perform actions on an affected device without authorization checks.

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

Cisco iOS XR< 25.2.2

Remediation

Fixed in
Cisco iOS XR≥ 25.2.2

References

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Frequently asked

Is CVE-2026-20046 being actively exploited?

CVE-2026-20046 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.14%.

How severe is CVE-2026-20046?

CVE-2026-20046 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 0.14% probability of exploitation.

Which products are affected by CVE-2026-20046?

Affected products include Cisco iOS XR.

How do I fix CVE-2026-20046?

Upgrade affected software to a fixed version, for example Cisco iOS XR 25.2.2 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-20046 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.