CVE-2026-20267: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XE Software engineering team has conducted a comprehensive internal security review.

criticalCVSS 9CVE-2026-20267

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XE Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20267 are related to improper access control issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-284.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: critical — CVSS 9
Published: 2026-08-05
Last updated: 2026-08-06
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-20267

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-202670.23% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 14% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-20267	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

high[NEW] [high] Cisco IOS XE: Multiple Vulnerabilitiescert-bund
unknownCisco Products Multiple Vulnerabilitieshkcert
unknownMultiple vulnerabilities in Cisco products (August 6, 2026)cert-fr-avis
criticalCisco Advance Notification for Publication of August 5, 2026, Security Advisoriescisco-psirt
criticalCisco IOS XE Software Security Hardening Release: August 2026cisco-psirt

Recent advisories for As part of

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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mediumCVE-2026-19006: A vulnerability was found in mf-yang openclaw-cn 2026.2.5. This affects an unknown part of the…nvd · 2026-08-06
highCVE-2026-18991: A security vulnerability has been detected in nanocoai NanoClaw up to 2.0.64. This affects an …nvd · 2026-08-06
lowCVE-2026-70430: Jenkins 2.575 and earlier, LTS 2.568.1 and earlier does not restrict the types of objects that…nvd · 2026-08-05