CiscoCVE-2026-20280
Cisco IOS XR Software: unhandled exceptional condition
High8.8CVE-2026-20280 · Published Sep 2, 2026 · updated Sep 18, 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-2026-20280 are related to improper checking or handling of exceptional condition issues that are grouped under the Common Weakness Enumeration (CWE) CWE-703.
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:L/UI:N/S:U/C:H/I:H/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-703
More Cisco advisories
All Cisco| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 2 | Cisco Secure Email: insufficient authenticity check | Medium5.9 | No fix yet |
| Sep 2 | Cisco IOS XR Software: protection mechanism failure | High8.2 | No fix yet |
| Sep 2 | As part of Cisco's ongoing commitment to proactive security and product quality | High8.8 | No fix yet |
| Sep 2 | Cisco IOS XR Software: improper access control | Critical9.8 | No fix yet |
| Sep 2 | Cisco Session Initiation Protocol (SIP) Software: denial of service | High7.5 | No fix yet |
| Sep 2 | Cisco Secure Email: unauthenticated, remote attacker could recover plain text | Medium5.9 | No fix yet |