Vulnerability details
CVE-2026-20280
Cisco IOS XR Software
Cisco IOS XR Software Security Hardening Release: September 2026
CVSS 3.1
8.8High
Official 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-2026-20280 are related to improper checking or handling of exceptional condition issues that are grouped under the Common Weakness Enumeration (CWE) CWE-703.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.8High | 3.1 | CVEProject cvelistV5 (CNA) (cisco) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Cisco | Cisco IOS XR Software | 24.1.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 24.1.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 24.2.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 24.2.11 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 24.2.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 24.2.20 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 24.2.21 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 24.3.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 24.3.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 24.3.20 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 24.3.30 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 24.4.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 24.4.10 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 24.4.15 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 24.4.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 24.4.30 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 25.1.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 25.1.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 25.1.30 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 25.2.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 25.2.15 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 25.2.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 25.2.21 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 25.2.30 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 25.3.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 25.3.15 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 25.4.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 25.4.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 25.4.201 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 25.4.30 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 26.1.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 26.1.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 26.2.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 26.2.100 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 26.2.101 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 6.5.25 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 6.5.26 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 6.5.28 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 6.5.29 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 6.5.31 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 6.5.32 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 6.5.33 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 6.5.35 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 6.5.351 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 6.5.352 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 6.5.353 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 6.5.90 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 6.7.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 6.7.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 6.7.3 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 6.7.35 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 6.7.4 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 6.8.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 6.8.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 6.9.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 6.9.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.0.0 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.0.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.0.11 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.0.12 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.0.14 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.0.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.0.90 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.1.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.1.15 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.1.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.1.25 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.1.3 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.10.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.10.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.11.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.11.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.11.21 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.2.0 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.2.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.2.12 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.2.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.3.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.3.15 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.3.16 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.3.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.3.27 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.3.3 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.3.4 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.3.5 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.3.6 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.4.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.4.15 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.4.16 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.4.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.5.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.5.12 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.5.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.5.3 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.5.4 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.5.5 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.5.52 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.6.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.6.15 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.6.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.6.3 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.7.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.7.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.7.21 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.8.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.8.12 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.8.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.8.22 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.8.23 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.9.1 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.9.2 | CVEProject cvelistV5 (CNA) |
| Cisco | Cisco IOS XR Software | 7.9.21 | CVEProject cvelistV5 (CNA) |
References and advisories
2
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Details
- Published
- 2026-09-02
- Last updated
- 2026-09-18
- State
- Published
- Assigner (CNA)
- cisco
Exploit prediction (EPSS)
0.49%
Probability of exploitation in 30 days
42.9%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-703Improper Check or Handling of Exceptional Conditions