CVE-2026-20231

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Workload engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities.   The vulnerabilities tracked by CVE-2026-20231 are related to improper neutralization of special elements issues that are grouped under the Common Weakness Enumeration (CWE) CWE-74.

CVSS v3 9.9 CRITICAL

9.9^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-csw1-shSvndWP
https://www.cve.org/Media/News/item/blog/2026/06/16/Preserving-Vulnerability-Level-Identification

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-19 17:18

Updated : 2026-08-20 19:16

NVD link : CVE-2026-20231

Mitre link : CVE-2026-20231

CVE.ORG link : CVE-2026-20231

JSON object : View

Products Affected

No product.

CWE

CWE-74

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

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"3.6.1.35"}, {"status": "affected", "version": "3.6.1.36"}, {"status": "affected", "version": "3.7.1.5"}, {"status": "affected", "version": "3.6.1.47"}, {"status": "affected", "version": "3.7.1.22"}, {"status": "affected", "version": "3.6.1.52"}, {"status": "affected", "version": "3.7.1.39"}, {"status": "affected", "version": "3.8.1.1"}, {"status": "affected", "version": "3.7.1.51"}, {"status": "affected", "version": "3.8.1.19"}, {"status": "affected", "version": "3.8.1.36"}, {"status": "affected", "version": "3.7.1.59"}, {"status": "affected", "version": "3.8.1.39"}, {"status": "affected", "version": "3.9.1.1"}, {"status": "affected", "version": "3.9.1.10"}, {"status": "affected", "version": "3.9.1.24"}, {"status": "affected", "version": "3.9.1.25"}, {"status": "affected", "version": "3.9.1.28"}, {"status": "affected", "version": "3.9.1.38"}, {"status": "affected", "version": "3.8.1.53"}, {"status": "affected", "version": "3.9.1.52"}, {"status": "affected", "version": "3.10.1.1"}, {"status": "affected", "version": "3.9.1.64"}, {"status": "affected", "version": "3.10.2.11"}, {"status": "affected", "version": "3.9.1.66"}, {"status": "affected", "version": "3.10.3.19"}, {"status": "affected", "version": "3.9.1.69"}, {"status": "affected", "version": "3.10.4.8"}, {"status": "affected", "version": "3.10.5.6"}, {"status": "affected", "version": "4.0.1.1"}, {"status": "affected", "version": "4.0.2.4"}, {"status": "affected", "version": "4.0.2.5"}, {"status": "affected", "version": "3.10.6.3"}, {"status": "affected", "version": "3.10.7.4"}, {"status": "affected", "version": "4.0.3.13"}, {"status": "affected", "version": "4.0.3.17"}, {"status": "affected", "version": "3.10.8.3"}], "defaultStatus": "unknown"}]}], "published": "2026-08-19T17:18:39.227", "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-csw1-shSvndWP", "source": "psirt@cisco.com"}, {"url": 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This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities.\r\n \r\nThe vulnerabilities tracked by CVE-2026-20231 are related to improper neutralization of special elements issues that are grouped under the Common Weakness Enumeration (CWE) CWE-74."}], "lastModified": "2026-08-20T19:16:51.497", "sourceIdentifier": "psirt@cisco.com"}