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.
| Vendor | Product | Versions |
|---|---|---|
| cis | cisco ios xe | 17.2.1a, 16.12.1y, 16.12.3s, 16.7.1b, 16.6.2, 16.6.5, 16.12.1w, 16.9.1d, 17.3.1, 16.9.4c, 16.7.1, 17.2.1, 16.6.8, 16.9.1b, 16.9.2s, 16.12.4, 16.12.3a, 17.1.1s, 16.11.1a, 16.7.2, 16.11.1b, 16.9.1s, 16.9.3h, 16.9.1c, 16.6.5a, 16.6.3, 16.10.1f, 17.2.1v, 16.8.1e, 16.9.3a, 16.12.1a, 16.12.1x, 16.6.4s, 16.10.1c, 16.12.3, 16.11.2, 16.6.5b, 16.12.2s, 16.10.1b, 16.7.3, 16.6.7, 16.9.6, 16.9.2, 16.10.1, 16.12.1t, 16.9.1, 16.8.1a, 16.9.3s, 16.6.7a, 16.12.2, 16.11.1, 16.9.3, 16.11.1s, 16.12.1, 17.1.1, 17.1.2, 16.10.1d, 17.1.1t, 16.9.4, 16.8.3, 16.12.2t, 16.9.5, 16.8.1s, 16.10.1e, 16.8.2, 16.6.4, 16.8.1b, 16.10.1a, 16.12.1z, 16.8.1c, 16.9.1a, 16.9.5f, 16.6.4a, 16.10.1g, 16.8.1, 16.6.6, 16.9.2a, 16.8.1d, 16.10.3, 16.7.1a, 16.11.1c, 16.10.1s, 17.2.1r, 17.1.1a, 16.10.2, 16.12.2a, 16.12.1c, 16.12.1s, 16.7.4, 17.2.2, 16.9.8, 16.9.7, 17.1.3, 17.3.1a, 17.3.2a, 16.12.5, 17.3.1w, 17.3.2, 17.4.1, 16.12.4a, 17.4.1a, 17.3.1x, 17.3.3, 16.6.9, 17.2.3, 17.5.1, 16.12.1z1, 16.12.5a, 17.4.1b, 17.3.1z, 16.12.5b, 17.4.2, 17.3.3a, 17.3.5, 17.3.4, 17.5.1a, 16.12.6, 17.6.1, 16.12.1z2, 16.6.10, 17.3.4a, 17.6.1a, 17.7.1, 17.6.1x, 17.6.2, 16.12.6a, 17.3.4c, 17.4.2a, 17.3.4b, 17.7.1a, 16.12.7, 17.8.1a, 17.6.3a, 17.6.3, 17.7.2, 17.7.1b, 17.9.1w, 17.3.5a, 17.6.1z, 16.12.8, 17.8.1, 17.9.1, 17.6.4, 17.3.5b, 17.9.1a, 17.3.6, 17.10.1, 16.9.8a, 17.6.1z1, 17.10.1a, 17.9.2, 17.6.5, 17.9.1x, 17.9.1y, 16.9.8b, 17.3.7, 17.9.2a, 17.9.3, 16.12.9, 17.11.1, 17.10.1b, 17.6.6, 17.9.1x1, 17.11.1a, 17.9.3a, 17.12.1, 17.3.8, 17.9.4, 16.12.10, 17.12.1w, 17.9.1y1, 17.12.1a, 17.9.5, 17.13.1, 17.12.1x, 17.12.2, 17.14.1, 17.9.4a, 17.3.8a, 17.6.6a, 17.6.5a, 17.6.7, 16.12.10a, 17.15.1, 17.13.1a, 17.12.2a, 16.12.11, 17.12.3, 17.12.1y, 17.12.1z, 17.9.5a, 17.14.1a, 17.9.5b, 17.6.8, 16.12.12, 17.12.4, 17.9.6, 17.17.1, 17.16.1, 17.15.1w, 17.12.3a, 17.9.5c, 17.15.1a, 17.12.1z1, 17.15.2, 17.15.1b, 17.9.5d, 17.15.1x, 17.9.6a, 17.12.1z2, 17.6.8a, 17.16.1a, 16.12.13, 17.15.3, 17.9.7, 17.12.5, 17.15.1y, 17.9.5e, 17.12.4a, 17.15.2a, 17.15.2c, 17.15.2b, 17.12.1z3, 17.9.5f, 17.12.4b, 17.12.5a, 17.18.1, 17.12.6, 17.12.1z4, 17.9.8, 17.9.7a, 17.15.3a, 17.15.4, 17.12.5b, 17.15.3b, 16.12.14, 17.18.1z, 17.9.7b, 17.12.5c, 26.1.1, 17.18.1a, 17.15.4a, 17.18.2, 17.18.1w, 17.15.4b, 17.12.6a, 17.12.7, 17.15.4c, 17.9.9, 17.12.5d, 16.12.15, 17.15.4s1, 17.15.5, 17.12.1z5, 17.18.1x, 17.12.1z6, 17.15.4d, 17.12.6b, 17.4.1c, 17.15.5a, 17.18.1y, 17.12.7a, 17.18.3, 17.12.7b, 17.18.3a, 26.1.1a, 17.15.7, 16.12.16 |
Downstream vendors/products affected by this vulnerability
| Vendor | Product | Source | Confidence |
|---|---|---|---|
| cis | ios xe | cert_advisory | 90% |
