CiscoCVE-2026-20274
As part of Cisco's ongoing commitment to proactive security and product quality
Critical9.8CVE-2026-20274 · Published Sep 2, 2026 · updated Sep 17, 2026
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Cisco IOS XR Software Product | <= 6.5.29 | No fix yet |
| <= 7.0.1 | No fix yet | |
| <= 6.5.26 | No fix yet | |
| <= 6.5.25 | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-664
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