CVE-2026-20272CWE-74

CVE-2026-20272

Critical · published August 5, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
46.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00573 · 46.6th percentile
Weakness
CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Published
2026-08-05T21:16Z
Affected products (267)
ProductVersionsFixed in
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
cisco/ios_xeall versions—
References (2)
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-iosxe-V8NMuMZJ · [email protected]https://www.cve.org/Media/News/item/blog/2026/06/16/Preserving-Vulnerability-Level-Identification · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 05 AUG 16:19Z
    Cisco IOS XE Software Security Hardening Release
    cvelistv5