CVE-2026-20279

CVE Enrichment

CVSS: 9.8 CRITICAL
EPSS: 0.30%
EPSS Percentile: 21.69%
CISA KEV: Not listed

Description

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XR Software engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20279 are related to improper access control issues that are grouped under the Common Weakness Enumeration (CWE) CWE-284.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: [email protected]
Published: 03-Sep-2026 00:17
Last Modified: 18-Sep-2026 20:17
EPSS Date: 2026-10-22
CWE: CWE-284

CVSS Vector


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

References

Last enrichment sync: 22-Oct-2026 22:55
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

CVE-2026-20274, which covers memory-safety and resource-lifetime bugs, and CVE-2026-20279, which covers access-control bugs including missing authentication for critical functions and improper certificate validation, Cisco Patches Critical Nexus 9000 Flaw Enabling Unauthenticated Remote Code Execution

CVE (7)

People (1)

Threat Actors (1)

MITRE ATT&CK (5)

Vendors (1)

Products (8)

Industries (1)

Countries (1)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.