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CVE-2026-20231: Cisco Secure Workload Software Security Hardening Release August 2026 - Improper Neutralization of Special Elements Vulnerabilities

• Severity: critical (CVSS 9.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-19 · updated 2026-08-20
• Weakness: CWE-74

Description

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.

Affected products

• Cisco Secure Workload: 2.2.1.41, 3.2.1.18, 3.3.2.50, 3.4.1.28, 3.4.1.34, 2.3.1.45 (+95)

References

• 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

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