CVE-2026-20268
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 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-2026-20268 are related to issues with improper restriction of operations within the bounds of a memory buffer that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-119.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Cisco | Cisco IOS XE Software | 17.2.1a | affected |
| Cisco | Cisco IOS XE Software | 16.12.1y | affected |
| Cisco | Cisco IOS XE Software | 16.12.3s | affected |
| Cisco | Cisco IOS XE Software | 16.7.1b | affected |
| Cisco | Cisco IOS XE Software | 16.6.2 | affected |
| Cisco | Cisco IOS XE Software | 16.6.5 | affected |
| Cisco | Cisco IOS XE Software | 16.12.1w | affected |
| Cisco | Cisco IOS XE Software | 16.9.1d | affected |
| Cisco | Cisco IOS XE Software | 17.3.1 | affected |
| Cisco | Cisco IOS XE Software | 16.9.4c | affected |
| Cisco | Cisco IOS XE Software | 16.7.1 | affected |
| Cisco | Cisco IOS XE Software | 17.2.1 | affected |
| Cisco | Cisco IOS XE Software | 16.6.8 | affected |
| Cisco | Cisco IOS XE Software | 16.9.1b | affected |
| Cisco | Cisco IOS XE Software | 16.9.2s | affected |
| Cisco | Cisco IOS XE Software | 16.12.4 | affected |
| Cisco | Cisco IOS XE Software | 16.12.3a | affected |
| Cisco | Cisco IOS XE Software | 17.1.1s | affected |
| Cisco | Cisco IOS XE Software | 16.11.1a | affected |
| Cisco | Cisco IOS XE Software | 16.7.2 | affected |
| Cisco | Cisco IOS XE Software | 16.11.1b | affected |
| Cisco | Cisco IOS XE Software | 16.9.1s | affected |
| Cisco | Cisco IOS XE Software | 16.9.3h | affected |
| Cisco | Cisco IOS XE Software | 16.9.1c | affected |
| Cisco | Cisco IOS XE Software | 16.6.5a | affected |
| Cisco | Cisco IOS XE Software | 16.6.3 | affected |
| Cisco | Cisco IOS XE Software | 16.10.1f | affected |
| Cisco | Cisco IOS XE Software | 17.2.1v | affected |
| Cisco | Cisco IOS XE Software | 16.8.1e | affected |
| Cisco | Cisco IOS XE Software | 16.9.3a | affected |
| Cisco | Cisco IOS XE Software | 16.12.1a | affected |
| Cisco | Cisco IOS XE Software | 16.12.1x | affected |
| Cisco | Cisco IOS XE Software | 16.6.4s | affected |
| Cisco | Cisco IOS XE Software | 16.10.1c | affected |
| Cisco | Cisco IOS XE Software | 16.12.3 | affected |
| Cisco | Cisco IOS XE Software | 16.11.2 | affected |
| Cisco | Cisco IOS XE Software | 16.6.5b | affected |
| Cisco | Cisco IOS XE Software | 16.12.2s | affected |
| Cisco | Cisco IOS XE Software | 16.10.1b | affected |
| Cisco | Cisco IOS XE Software | 16.7.3 | affected |
| Cisco | Cisco IOS XE Software | 16.6.7 | affected |
| Cisco | Cisco IOS XE Software | 16.9.6 | affected |
| Cisco | Cisco IOS XE Software | 16.9.2 | affected |
| Cisco | Cisco IOS XE Software | 16.10.1 | affected |
| Cisco | Cisco IOS XE Software | 16.12.1t | affected |
| Cisco | Cisco IOS XE Software | 16.9.1 | affected |
| Cisco | Cisco IOS XE Software | 16.8.1a | affected |
| Cisco | Cisco IOS XE Software | 16.9.3s | affected |
| Cisco | Cisco IOS XE Software | 16.6.7a | affected |
| Cisco | Cisco IOS XE Software | 16.12.2 | affected |
| Cisco | Cisco IOS XE Software | 16.11.1 | affected |
| Cisco | Cisco IOS XE Software | 16.9.3 | affected |
| Cisco | Cisco IOS XE Software | 16.11.1s | affected |
| Cisco | Cisco IOS XE Software | 16.12.1 | affected |
| Cisco | Cisco IOS XE Software | 17.1.1 | affected |
| Cisco | Cisco IOS XE Software | 17.1.2 | affected |
| Cisco | Cisco IOS XE Software | 16.10.1d | affected |
| Cisco | Cisco IOS XE Software | 17.1.1t | affected |
| Cisco | Cisco IOS XE Software | 16.9.4 | affected |
| Cisco | Cisco IOS XE Software | 16.8.3 | affected |
| Cisco | Cisco IOS XE Software | 16.12.2t | affected |
| Cisco | Cisco IOS XE Software | 16.9.5 | affected |
| Cisco | Cisco IOS XE Software | 16.8.1s | affected |
| Cisco | Cisco IOS XE Software | 16.10.1e | affected |
| Cisco | Cisco IOS XE Software | 16.8.2 | affected |
| Cisco | Cisco IOS XE Software | 16.6.4 | affected |
| Cisco | Cisco IOS XE Software | 16.8.1b | affected |
| Cisco | Cisco IOS XE Software | 16.10.1a | affected |
| Cisco | Cisco IOS XE Software | 16.12.1z | affected |
| Cisco | Cisco IOS XE Software | 16.8.1c | affected |
| Cisco | Cisco IOS XE Software | 16.9.1a | affected |
| Cisco | Cisco IOS XE Software | 16.9.5f | affected |
| Cisco | Cisco IOS XE Software | 16.6.4a | affected |
| Cisco | Cisco IOS XE Software | 16.10.1g | affected |
| Cisco | Cisco IOS XE Software | 16.8.1 | affected |
| Cisco | Cisco IOS XE Software | 16.6.6 | affected |
| Cisco | Cisco IOS XE Software | 16.9.2a | affected |
| Cisco | Cisco IOS XE Software | 16.8.1d | affected |
| Cisco | Cisco IOS XE Software | 16.10.3 | affected |
| Cisco | Cisco IOS XE Software | 16.7.1a | affected |
| Cisco | Cisco IOS XE Software | 16.11.1c | affected |
| Cisco | Cisco IOS XE Software | 16.10.1s | affected |
| Cisco | Cisco IOS XE Software | 17.2.1r | affected |
| Cisco | Cisco IOS XE Software | 17.1.1a | affected |
| Cisco | Cisco IOS XE Software | 16.10.2 | affected |
| Cisco | Cisco IOS XE Software | 16.12.2a | affected |
| Cisco | Cisco IOS XE Software | 16.12.1c | affected |
| Cisco | Cisco IOS XE Software | 16.12.1s | affected |
| Cisco | Cisco IOS XE Software | 16.7.4 | affected |
| Cisco | Cisco IOS XE Software | 17.2.2 | affected |
| Cisco | Cisco IOS XE Software | 16.9.8 | affected |
| Cisco | Cisco IOS XE Software | 16.9.7 | affected |
| Cisco | Cisco IOS XE Software | 17.1.3 | affected |
| Cisco | Cisco IOS XE Software | 17.3.1a | affected |
| Cisco | Cisco IOS XE Software | 17.3.2a | affected |
| Cisco | Cisco IOS XE Software | 16.12.5 | affected |
| Cisco | Cisco IOS XE Software | 17.3.1w | affected |
| Cisco | Cisco IOS XE Software | 17.3.2 | affected |
| Cisco | Cisco IOS XE Software | 17.4.1 | affected |
| Cisco | Cisco IOS XE Software | 16.12.4a | affected |
| Cisco | Cisco IOS XE Software | 17.4.1a | affected |
| Cisco | Cisco IOS XE Software | 17.3.1x | affected |
| Cisco | Cisco IOS XE Software | 17.3.3 | affected |
| Cisco | Cisco IOS XE Software | 16.6.9 | affected |
| Cisco | Cisco IOS XE Software | 17.2.3 | affected |
| Cisco | Cisco IOS XE Software | 17.5.1 | affected |
| Cisco | Cisco IOS XE Software | 16.12.1z1 | affected |
| Cisco | Cisco IOS XE Software | 16.12.5a | affected |
| Cisco | Cisco IOS XE Software | 17.4.1b | affected |
| Cisco | Cisco IOS XE Software | 17.3.1z | affected |
| Cisco | Cisco IOS XE Software | 16.12.5b | affected |
| Cisco | Cisco IOS XE Software | 17.4.2 | affected |
| Cisco | Cisco IOS XE Software | 17.3.3a | affected |
| Cisco | Cisco IOS XE Software | 17.3.5 | affected |
| Cisco | Cisco IOS XE Software | 17.3.4 | affected |
| Cisco | Cisco IOS XE Software | 17.5.1a | affected |
| Cisco | Cisco IOS XE Software | 16.12.6 | affected |
| Cisco | Cisco IOS XE Software | 17.6.1 | affected |
| Cisco | Cisco IOS XE Software | 16.12.1z2 | affected |
| Cisco | Cisco IOS XE Software | 16.6.10 | affected |
| Cisco | Cisco IOS XE Software | 17.3.4a | affected |
| Cisco | Cisco IOS XE Software | 17.6.1a | affected |
| Cisco | Cisco IOS XE Software | 17.7.1 | affected |
| Cisco | Cisco IOS XE Software | 17.6.1x | affected |
| Cisco | Cisco IOS XE Software | 17.6.2 | affected |
| Cisco | Cisco IOS XE Software | 16.12.6a | affected |
| Cisco | Cisco IOS XE Software | 17.3.4c | affected |
| Cisco | Cisco IOS XE Software | 17.4.2a | affected |
| Cisco | Cisco IOS XE Software | 17.3.4b | affected |
| Cisco | Cisco IOS XE Software | 17.7.1a | affected |
| Cisco | Cisco IOS XE Software | 16.12.7 | affected |
| Cisco | Cisco IOS XE Software | 17.8.1a | affected |
| Cisco | Cisco IOS XE Software | 17.6.3a | affected |
| Cisco | Cisco IOS XE Software | 17.6.3 | affected |
| Cisco | Cisco IOS XE Software | 17.7.2 | affected |
| Cisco | Cisco IOS XE Software | 17.7.1b | affected |
| Cisco | Cisco IOS XE Software | 17.9.1w | affected |
| Cisco | Cisco IOS XE Software | 17.3.5a | affected |
| Cisco | Cisco IOS XE Software | 17.6.1z | affected |
| Cisco | Cisco IOS XE Software | 16.12.8 | affected |
| Cisco | Cisco IOS XE Software | 17.8.1 | affected |
| Cisco | Cisco IOS XE Software | 17.9.1 | affected |
| Cisco | Cisco IOS XE Software | 17.6.4 | affected |
| Cisco | Cisco IOS XE Software | 17.3.5b | affected |
| Cisco | Cisco IOS XE Software | 17.9.1a | affected |
| Cisco | Cisco IOS XE Software | 17.3.6 | affected |
| Cisco | Cisco IOS XE Software | 17.10.1 | affected |
| Cisco | Cisco IOS XE Software | 16.9.8a | affected |
| Cisco | Cisco IOS XE Software | 17.6.1z1 | affected |
| Cisco | Cisco IOS XE Software | 17.10.1a | affected |
| Cisco | Cisco IOS XE Software | 17.9.2 | affected |
| Cisco | Cisco IOS XE Software | 17.6.5 | affected |
| Cisco | Cisco IOS XE Software | 17.9.1x | affected |
| Cisco | Cisco IOS XE Software | 17.9.1y | affected |
| Cisco | Cisco IOS XE Software | 16.9.8b | affected |
| Cisco | Cisco IOS XE Software | 17.3.7 | affected |
| Cisco | Cisco IOS XE Software | 17.9.2a | affected |
| Cisco | Cisco IOS XE Software | 17.9.3 | affected |
| Cisco | Cisco IOS XE Software | 16.12.9 | affected |
| Cisco | Cisco IOS XE Software | 17.11.1 | affected |
| Cisco | Cisco IOS XE Software | 17.10.1b | affected |
| Cisco | Cisco IOS XE Software | 17.6.6 | affected |
| Cisco | Cisco IOS XE Software | 17.9.1x1 | affected |
| Cisco | Cisco IOS XE Software | 17.11.1a | affected |
| Cisco | Cisco IOS XE Software | 17.9.3a | affected |
| Cisco | Cisco IOS XE Software | 17.12.1 | affected |
| Cisco | Cisco IOS XE Software | 17.3.8 | affected |
| Cisco | Cisco IOS XE Software | 17.9.4 | affected |
| Cisco | Cisco IOS XE Software | 16.12.10 | affected |
| Cisco | Cisco IOS XE Software | 17.12.1w | affected |
| Cisco | Cisco IOS XE Software | 17.9.1y1 | affected |
| Cisco | Cisco IOS XE Software | 17.12.1a | affected |
| Cisco | Cisco IOS XE Software | 17.9.5 | affected |
| Cisco | Cisco IOS XE Software | 17.13.1 | affected |
| Cisco | Cisco IOS XE Software | 17.12.1x | affected |
| Cisco | Cisco IOS XE Software | 17.12.2 | affected |
| Cisco | Cisco IOS XE Software | 17.14.1 | affected |
| Cisco | Cisco IOS XE Software | 17.9.4a | affected |
| Cisco | Cisco IOS XE Software | 17.3.8a | affected |
| Cisco | Cisco IOS XE Software | 17.6.6a | affected |
| Cisco | Cisco IOS XE Software | 17.6.5a | affected |
| Cisco | Cisco IOS XE Software | 17.6.7 | affected |
| Cisco | Cisco IOS XE Software | 16.12.10a | affected |
| Cisco | Cisco IOS XE Software | 17.15.1 | affected |
| Cisco | Cisco IOS XE Software | 17.13.1a | affected |
| Cisco | Cisco IOS XE Software | 17.12.2a | affected |
| Cisco | Cisco IOS XE Software | 16.12.11 | affected |
| Cisco | Cisco IOS XE Software | 17.12.3 | affected |
| Cisco | Cisco IOS XE Software | 17.12.1y | affected |
| Cisco | Cisco IOS XE Software | 17.12.1z | affected |
| Cisco | Cisco IOS XE Software | 17.9.5a | affected |
| Cisco | Cisco IOS XE Software | 17.14.1a | affected |
| Cisco | Cisco IOS XE Software | 17.9.5b | affected |
| Cisco | Cisco IOS XE Software | 17.6.8 | affected |
| Cisco | Cisco IOS XE Software | 16.12.12 | affected |
| Cisco | Cisco IOS XE Software | 17.12.4 | affected |
| Cisco | Cisco IOS XE Software | 17.9.6 | affected |
| Cisco | Cisco IOS XE Software | 17.17.1 | affected |
| Cisco | Cisco IOS XE Software | 17.16.1 | affected |
| Cisco | Cisco IOS XE Software | 17.15.1w | affected |
| Cisco | Cisco IOS XE Software | 17.12.3a | affected |
| Cisco | Cisco IOS XE Software | 17.9.5c | affected |
| Cisco | Cisco IOS XE Software | 17.15.1a | affected |
| Cisco | Cisco IOS XE Software | 17.12.1z1 | affected |
| Cisco | Cisco IOS XE Software | 17.15.2 | affected |
| Cisco | Cisco IOS XE Software | 17.15.1b | affected |
| Cisco | Cisco IOS XE Software | 17.9.5d | affected |
| Cisco | Cisco IOS XE Software | 17.15.1x | affected |
| Cisco | Cisco IOS XE Software | 17.9.6a | affected |
| Cisco | Cisco IOS XE Software | 17.12.1z2 | affected |
| Cisco | Cisco IOS XE Software | 17.6.8a | affected |
| Cisco | Cisco IOS XE Software | 17.16.1a | affected |
| Cisco | Cisco IOS XE Software | 16.12.13 | affected |
| Cisco | Cisco IOS XE Software | 17.15.3 | affected |
| Cisco | Cisco IOS XE Software | 17.9.7 | affected |
| Cisco | Cisco IOS XE Software | 17.12.5 | affected |
| Cisco | Cisco IOS XE Software | 17.15.1y | affected |
| Cisco | Cisco IOS XE Software | 17.9.5e | affected |
| Cisco | Cisco IOS XE Software | 17.12.4a | affected |
| Cisco | Cisco IOS XE Software | 17.15.2a | affected |
| Cisco | Cisco IOS XE Software | 17.15.2c | affected |
| Cisco | Cisco IOS XE Software | 17.15.2b | affected |
| Cisco | Cisco IOS XE Software | 17.12.1z3 | affected |
| Cisco | Cisco IOS XE Software | 17.9.5f | affected |
| Cisco | Cisco IOS XE Software | 17.12.4b | affected |
| Cisco | Cisco IOS XE Software | 17.12.5a | affected |
| Cisco | Cisco IOS XE Software | 17.18.1 | affected |
| Cisco | Cisco IOS XE Software | 17.12.6 | affected |
| Cisco | Cisco IOS XE Software | 17.12.1z4 | affected |
| Cisco | Cisco IOS XE Software | 17.9.8 | affected |
| Cisco | Cisco IOS XE Software | 17.9.7a | affected |
| Cisco | Cisco IOS XE Software | 17.15.3a | affected |
| Cisco | Cisco IOS XE Software | 17.15.4 | affected |
| Cisco | Cisco IOS XE Software | 17.12.5b | affected |
| Cisco | Cisco IOS XE Software | 17.15.3b | affected |
| Cisco | Cisco IOS XE Software | 16.12.14 | affected |
| Cisco | Cisco IOS XE Software | 17.18.1z | affected |
| Cisco | Cisco IOS XE Software | 17.9.7b | affected |
| Cisco | Cisco IOS XE Software | 17.12.5c | affected |
| Cisco | Cisco IOS XE Software | 26.1.1 | affected |
| Cisco | Cisco IOS XE Software | 17.18.1a | affected |
| Cisco | Cisco IOS XE Software | 17.15.4a | affected |
| Cisco | Cisco IOS XE Software | 17.18.2 | affected |
| Cisco | Cisco IOS XE Software | 17.18.1w | affected |
| Cisco | Cisco IOS XE Software | 17.15.4b | affected |
| Cisco | Cisco IOS XE Software | 17.12.6a | affected |
| Cisco | Cisco IOS XE Software | 17.12.7 | affected |
| Cisco | Cisco IOS XE Software | 17.15.4c | affected |
| Cisco | Cisco IOS XE Software | 17.9.9 | affected |
| Cisco | Cisco IOS XE Software | 17.12.5d | affected |
| Cisco | Cisco IOS XE Software | 16.12.15 | affected |
| Cisco | Cisco IOS XE Software | 17.15.4s1 | affected |
| Cisco | Cisco IOS XE Software | 17.15.5 | affected |
| Cisco | Cisco IOS XE Software | 17.12.1z5 | affected |
| Cisco | Cisco IOS XE Software | 17.18.1x | affected |
| Cisco | Cisco IOS XE Software | 17.12.1z6 | affected |
| Cisco | Cisco IOS XE Software | 17.15.4d | affected |
| Cisco | Cisco IOS XE Software | 17.12.6b | affected |
| Cisco | Cisco IOS XE Software | 17.4.1c | affected |
| Cisco | Cisco IOS XE Software | 17.15.5a | affected |
| Cisco | Cisco IOS XE Software | 17.18.1y | affected |
| Cisco | Cisco IOS XE Software | 17.12.7a | affected |
| Cisco | Cisco IOS XE Software | 17.18.3 | affected |
| Cisco | Cisco IOS XE Software | 17.12.7b | affected |
| Cisco | Cisco IOS XE Software | 17.18.3a | affected |
| Cisco | Cisco IOS XE Software | 26.1.1a | affected |
| Cisco | Cisco IOS XE Software | 17.15.7 | affected |
| Cisco | Cisco IOS XE Software | 16.12.16 | affected |
Weaknesses
- CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
Additional References
References
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.