Vulnerabilities

CVE-2026-20279

Cisco IOS XR Software: Improper Access Control

Track*
CVSS 9.8 Critical

What it is

Reported

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XR...

Source reported · Source: NVD · Source description excerpt; the stored source text may be truncated.

Dates

Source last published: 2026-09-02 21:17 UTC · Source last updated: 2026-10-25 19:05 UTC

What is affected

Reported

Cisco; Cisco IOS XR Software. Product-level identification only; no affected-version conclusion is available from this field.

Source reported · Source: NVD

Dates

Source last published: 2026-09-02 21:17 UTC · Source last updated: 2026-10-25 19:05 UTC

Urgency and basis

Tracker computed

Track*

Current priority score and EPSS: loading from the tracker record. They are read when this page loads and are not shown without JavaScript. They change daily and are not part of "Source last updated".

Tracker decision tier from the evidence detailed below

Dates

Source last updated: 2026-10-25 19:05 UTC

Exploitation evidence

Not reported

Not reported by tracked sources.

What to do

Reported

A source remediation link is available. Validate that guidance against the affected product and your environment.

Source remediation ↗

Source reported · Tracked source remediation field

Dates

Source last updated: 2026-10-25 19:05 UTC

Detection and validation

Mapped metadata availability only. These signals do not change priority.

Sigma, Atomic, Nuclei, and Metasploit: none mapped by tracked sources.

Sigma
Not mapped by tracked sources.
Atomic
Not mapped by tracked sources.
Nuclei
Not mapped by tracked sources.
Metasploit
Not mapped by tracked sources.

Evidence detail

Loading the full tracker evidence record…