CVE-2026-20276
8.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Summary
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-2026-20276 are related to insufficient control flow management issues that are grouped under the Common Weakness Enumeration (CWE) CWE-691.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Cisco | Cisco IOS XR Software | 6.5.29 | affected |
| Cisco | Cisco IOS XR Software | 7.0.1 | affected |
| Cisco | Cisco IOS XR Software | 6.5.26 | affected |
| Cisco | Cisco IOS XR Software | 6.5.25 | affected |
| Cisco | Cisco IOS XR Software | 6.5.28 | affected |
| Cisco | Cisco IOS XR Software | 6.5.90 | affected |
| Cisco | Cisco IOS XR Software | 7.1.1 | affected |
| Cisco | Cisco IOS XR Software | 7.0.90 | affected |
| Cisco | Cisco IOS XR Software | 6.7.1 | affected |
| Cisco | Cisco IOS XR Software | 7.0.2 | affected |
| Cisco | Cisco IOS XR Software | 7.1.15 | affected |
| Cisco | Cisco IOS XR Software | 7.2.1 | affected |
| Cisco | Cisco IOS XR Software | 7.1.2 | affected |
| Cisco | Cisco IOS XR Software | 6.7.2 | affected |
| Cisco | Cisco IOS XR Software | 7.0.11 | affected |
| Cisco | Cisco IOS XR Software | 7.0.12 | affected |
| Cisco | Cisco IOS XR Software | 7.0.14 | affected |
| Cisco | Cisco IOS XR Software | 7.1.25 | affected |
| Cisco | Cisco IOS XR Software | 7.2.12 | affected |
| Cisco | Cisco IOS XR Software | 7.3.1 | affected |
| Cisco | Cisco IOS XR Software | 7.1.3 | affected |
| Cisco | Cisco IOS XR Software | 6.7.3 | affected |
| Cisco | Cisco IOS XR Software | 7.4.1 | affected |
| Cisco | Cisco IOS XR Software | 7.2.2 | affected |
| Cisco | Cisco IOS XR Software | 6.7.4 | affected |
| Cisco | Cisco IOS XR Software | 6.5.31 | affected |
| Cisco | Cisco IOS XR Software | 7.3.15 | affected |
| Cisco | Cisco IOS XR Software | 7.3.16 | affected |
| Cisco | Cisco IOS XR Software | 6.8.1 | affected |
| Cisco | Cisco IOS XR Software | 7.4.15 | affected |
| Cisco | Cisco IOS XR Software | 6.5.32 | affected |
| Cisco | Cisco IOS XR Software | 7.3.2 | affected |
| Cisco | Cisco IOS XR Software | 7.5.1 | affected |
| Cisco | Cisco IOS XR Software | 7.4.16 | affected |
| Cisco | Cisco IOS XR Software | 7.3.27 | affected |
| Cisco | Cisco IOS XR Software | 7.6.1 | affected |
| Cisco | Cisco IOS XR Software | 7.5.2 | affected |
| Cisco | Cisco IOS XR Software | 7.8.1 | affected |
| Cisco | Cisco IOS XR Software | 7.6.15 | affected |
| Cisco | Cisco IOS XR Software | 7.5.12 | affected |
| Cisco | Cisco IOS XR Software | 7.8.12 | affected |
| Cisco | Cisco IOS XR Software | 7.3.3 | affected |
| Cisco | Cisco IOS XR Software | 7.7.1 | affected |
| Cisco | Cisco IOS XR Software | 6.8.2 | affected |
| Cisco | Cisco IOS XR Software | 7.3.4 | affected |
| Cisco | Cisco IOS XR Software | 7.4.2 | affected |
| Cisco | Cisco IOS XR Software | 6.7.35 | affected |
| Cisco | Cisco IOS XR Software | 6.9.1 | affected |
| Cisco | Cisco IOS XR Software | 7.6.2 | affected |
| Cisco | Cisco IOS XR Software | 7.5.3 | affected |
| Cisco | Cisco IOS XR Software | 7.7.2 | affected |
| Cisco | Cisco IOS XR Software | 6.9.2 | affected |
| Cisco | Cisco IOS XR Software | 7.9.1 | affected |
| Cisco | Cisco IOS XR Software | 7.10.1 | affected |
| Cisco | Cisco IOS XR Software | 7.8.2 | affected |
| Cisco | Cisco IOS XR Software | 7.5.4 | affected |
| Cisco | Cisco IOS XR Software | 6.5.33 | affected |
| Cisco | Cisco IOS XR Software | 7.8.22 | affected |
| Cisco | Cisco IOS XR Software | 7.7.21 | affected |
| Cisco | Cisco IOS XR Software | 7.9.2 | affected |
| Cisco | Cisco IOS XR Software | 7.3.5 | affected |
| Cisco | Cisco IOS XR Software | 7.5.5 | affected |
| Cisco | Cisco IOS XR Software | 7.11.1 | affected |
| Cisco | Cisco IOS XR Software | 7.9.21 | affected |
| Cisco | Cisco IOS XR Software | 7.10.2 | affected |
| Cisco | Cisco IOS XR Software | 24.1.1 | affected |
| Cisco | Cisco IOS XR Software | 7.6.3 | affected |
| Cisco | Cisco IOS XR Software | 7.3.6 | affected |
| Cisco | Cisco IOS XR Software | 7.5.52 | affected |
| Cisco | Cisco IOS XR Software | 7.11.2 | affected |
| Cisco | Cisco IOS XR Software | 24.2.1 | affected |
| Cisco | Cisco IOS XR Software | 24.1.2 | affected |
| Cisco | Cisco IOS XR Software | 24.2.11 | affected |
| Cisco | Cisco IOS XR Software | 24.3.1 | affected |
| Cisco | Cisco IOS XR Software | 24.4.1 | affected |
| Cisco | Cisco IOS XR Software | 24.2.2 | affected |
| Cisco | Cisco IOS XR Software | 7.8.23 | affected |
| Cisco | Cisco IOS XR Software | 7.11.21 | affected |
| Cisco | Cisco IOS XR Software | 24.2.20 | affected |
| Cisco | Cisco IOS XR Software | 24.3.2 | affected |
| Cisco | Cisco IOS XR Software | 24.4.10 | affected |
| Cisco | Cisco IOS XR Software | 6.5.35 | affected |
| Cisco | Cisco IOS XR Software | 25.1.1 | affected |
| Cisco | Cisco IOS XR Software | 24.4.2 | affected |
| Cisco | Cisco IOS XR Software | 24.3.20 | affected |
| Cisco | Cisco IOS XR Software | 24.4.15 | affected |
| Cisco | Cisco IOS XR Software | 25.2.1 | affected |
| Cisco | Cisco IOS XR Software | 6.5.351 | affected |
| Cisco | Cisco IOS XR Software | 25.1.2 | affected |
| Cisco | Cisco IOS XR Software | 24.3.30 | affected |
| Cisco | Cisco IOS XR Software | 25.3.1 | affected |
| Cisco | Cisco IOS XR Software | 6.5.352 | affected |
| Cisco | Cisco IOS XR Software | 24.4.30 | affected |
| Cisco | Cisco IOS XR Software | 24.2.21 | affected |
| Cisco | Cisco IOS XR Software | 25.4.1 | affected |
| Cisco | Cisco IOS XR Software | 25.2.2 | affected |
| Cisco | Cisco IOS XR Software | 25.2.15 | affected |
| Cisco | Cisco IOS XR Software | 7.2.0 | affected |
| Cisco | Cisco IOS XR Software | 7.0.0 | affected |
| Cisco | Cisco IOS XR Software | 25.2.30 | affected |
| Cisco | Cisco IOS XR Software | 6.5.353 | affected |
| Cisco | Cisco IOS XR Software | 26.1.1 | affected |
| Cisco | Cisco IOS XR Software | 25.1.30 | affected |
| Cisco | Cisco IOS XR Software | 25.3.15 | affected |
| Cisco | Cisco IOS XR Software | 26.2.100 | affected |
| Cisco | Cisco IOS XR Software | 25.4.2 | affected |
| Cisco | Cisco IOS XR Software | 26.2.1 | affected |
| Cisco | Cisco IOS XR Software | 25.4.30 | affected |
| Cisco | Cisco IOS XR Software | 26.1.2 | affected |
| Cisco | Cisco IOS XR Software | 25.4.201 | affected |
| Cisco | Cisco IOS XR Software | 26.2.101 | affected |
| Cisco | Cisco IOS XR Software | 25.2.21 | affected |
Weaknesses
- CWE-691: Insufficient Control Flow Management
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
Additional References
References
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