CVE-2026-20272
CRITICAL
INFO
Priority: 0.06
BB Relevance:
80/100
Published: 2026-08-05
Modified: 2026-10-23
First seen: 2026-10-29
Status: active
Attack Surface
Network
Low Complexity
No Auth
No Interaction
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
None
S:
Unchanged
C:
High
I:
High
A:
High
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-2026-20272 are related to issues with improper neutralization of special elements that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-74.
Weakness Classification (1)
Affected Software (267)
| Vendor | Product | Version |
|---|---|---|
| cisco | ios_xe | 16.6.2 |
| cisco | ios_xe | 16.6.3 |
| cisco | ios_xe | 16.6.4 |
| cisco | ios_xe | 16.6.4a |
| cisco | ios_xe | 16.6.4s |
| cisco | ios_xe | 16.6.5 |
| cisco | ios_xe | 16.6.5a |
| cisco | ios_xe | 16.6.5b |
| cisco | ios_xe | 16.6.6 |
| cisco | ios_xe | 16.6.7 |
| cisco | ios_xe | 16.6.7a |
| cisco | ios_xe | 16.6.8 |
| cisco | ios_xe | 16.6.9 |
| cisco | ios_xe | 16.6.10 |
| cisco | ios_xe | 16.7.1 |
| cisco | ios_xe | 16.7.1a |
| cisco | ios_xe | 16.7.1b |
| cisco | ios_xe | 16.7.2 |
| cisco | ios_xe | 16.7.3 |
| cisco | ios_xe | 16.7.4 |
| cisco | ios_xe | 16.8.1 |
| cisco | ios_xe | 16.8.1a |
| cisco | ios_xe | 16.8.1b |
| cisco | ios_xe | 16.8.1c |
| cisco | ios_xe | 16.8.1d |
| cisco | ios_xe | 16.8.1e |
| cisco | ios_xe | 16.8.1s |
| cisco | ios_xe | 16.8.2 |
| cisco | ios_xe | 16.8.3 |
| cisco | ios_xe | 16.9.1 |
Showing 30 of 267 entries
References & Advisories (2)
Vendor Advisory