8.6
High
CVE-2026-20270 As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XE Software engineering…
Description
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XE Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20270 are related to incorrect calculation issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-682.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco IOS XE Software 26.1 | 26.1.1a → 26.1.3 | No fix stated |
| Cisco IOS XE Software 17.18 | 17.18.1z → 17.18.5 | No fix stated |
| Cisco IOS XE Software | 17.17.1 | No fix stated |
| Cisco IOS XE Software 17.16 | 17.16.1a → 17.16.1 | No fix stated |
| Cisco IOS XE Software 17.15 | 17.15.1w → 17.15.7 | No fix stated |
| Cisco IOS XE Software 17.14 | 17.14.1a → 17.14.1 | No fix stated |
| Cisco IOS XE Software 17.13 | 17.13.1a → 17.13.1 | No fix stated |
| Cisco IOS XE Software 17.12 | 17.12.1w → 17.12.9 | No fix stated |
| Cisco IOS XE Software 17.11 | 17.11.1a → 17.11.1 | No fix stated |
Show the 17 other branches Hide the 17 other branches
| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco IOS XE Software 17.10 | 17.10.1a → 17.10.1 | No fix stated |
| Cisco IOS XE Software 17.9 | 17.9.1w → 17.9.9 | No fix stated |
| Cisco IOS XE Software 17.8 | 17.8.1a → 17.8.1 | No fix stated |
| Cisco IOS XE Software 17.7 | 17.7.1a → 17.7.2 | No fix stated |
| Cisco IOS XE Software 17.6 | 17.6.1x → 17.6.8 | No fix stated |
| Cisco IOS XE Software 17.5 | 17.5.1a → 17.5.1 | No fix stated |
| Cisco IOS XE Software 17.4 | 17.4.1c → 17.4.2 | No fix stated |
| Cisco IOS XE Software 17.3 | 17.3.1w → 17.3.8 | No fix stated |
| Cisco IOS XE Software 17.2 | 17.2.1v → 17.2.3 | No fix stated |
| Cisco IOS XE Software 17.1 | 17.1.1s → 17.1.3 | No fix stated |
| Cisco IOS XE Software 16.12 | 16.12.1y → 16.12.16 | No fix stated |
| Cisco IOS XE Software 16.11 | 16.11.1s → 16.11.2 | No fix stated |
| Cisco IOS XE Software 16.10 | 16.10.1f → 16.10.3 | No fix stated |
| Cisco IOS XE Software 16.9 | 16.9.1d → 16.9.8 | No fix stated |
| Cisco IOS XE Software 16.8 | 16.8.1e → 16.8.3 | No fix stated |
| Cisco IOS XE Software 16.7 | 16.7.1a → 16.7.4 | No fix stated |
| Cisco IOS XE Software 16.6 | 16.6.2 → 16.6.10 | No fix stated |
References
- cisco-sa-hardening-iosxe-V8NMuMZJ sec.cloudapps.cisco.com
Timeline
- Published
- Last modified
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