CVE-2026-20274
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-2026-20274 are related to improper resource control issues that are grouped under the Common Weakness Enumeration (CWE) CWE-664.
Scoring
- Severity
- CRITICAL
- CVSS base score
- 9.8
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS probability
- 0.67%
- CWE
- CWE-664
- Published
- 2026-09-02
- Last modified
- 2026-09-09
Affected products
- Cisco Cisco IOS XR Software
- Cisco Cisco IOS XR Software
- Cisco Cisco IOS XR Software
- Cisco Cisco IOS XR Software
- Cisco Cisco IOS XR Software
- Cisco Cisco IOS XR Software
- Cisco Cisco IOS XR Software
- Cisco Cisco IOS XR Software
Weakness type
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