CVE-2026-20318

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-2026-20318 are related to improper input validation issues that are grouped under the Common Weakness Enumeration (CWE) CWE-20.

CVSS v3 9.6 CRITICAL

9.6^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

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 16:17

NVD link : CVE-2026-20318

Mitre link : CVE-2026-20318

CVE.ORG link : CVE-2026-20318

JSON object : View

Products Affected

No product.

CWE

CWE-20

Improper Input Validation

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{"status": "affected", "version": "3.2.1.18"}, {"status": "affected", "version": "3.3.2.50"}, {"status": "affected", "version": "3.4.1.28"}, {"status": "affected", "version": "3.4.1.34"}, {"status": "affected", "version": "2.3.1.45"}, {"status": "affected", "version": "2.3.1.41"}, {"status": "affected", "version": "3.3.2.28"}, {"status": "affected", "version": "3.1.1.59"}, {"status": "affected", "version": "2.0.2.20"}, {"status": "affected", "version": "2.1.1.33"}, {"status": "affected", "version": "2.1.1.29"}, {"status": "affected", "version": "3.2.1.28"}, {"status": "affected", "version": "3.4.1.35"}, {"status": "affected", "version": "3.1.1.65"}, {"status": "affected", "version": "3.1.1.67"}, {"status": "affected", "version": "2.0.1.34"}, {"status": "affected", "version": "2.3.1.49"}, {"status": "affected", "version": "2.2.1.39"}, {"status": "affected", "version": "3.4.1.19"}, {"status": "affected", "version": "3.3.2.23"}, {"status": "affected", "version": "3.1.1.61"}, {"status": "affected", "version": "3.1.1.54"}, {"status": "affected", "version": "3.5.1.17"}, {"status": "affected", "version": "3.3.2.33"}, {"status": "affected", "version": "3.5.1.1"}, {"status": "affected", "version": "2.3.1.53"}, {"status": "affected", "version": "3.5.1.20"}, {"status": "affected", "version": "3.5.1.30"}, {"status": "affected", "version": "3.3.2.16"}, {"status": "affected", "version": "3.1.1.55"}, {"status": "affected", "version": "3.4.1.6"}, {"status": "affected", "version": "2.3.1.50"}, {"status": "affected", "version": "2.3.1.52"}, {"status": "affected", "version": "3.2.1.19"}, {"status": "affected", "version": "2.2.1.35"}, {"status": "affected", "version": "3.1.1.53"}, {"status": "affected", "version": "3.1.1.70"}, {"status": "affected", "version": "3.2.1.20"}, {"status": "affected", "version": "3.5.1.2"}, {"status": "affected", "version": "1.103.1.12"}, {"status": "affected", "version": "2.3.1.51"}, {"status": "affected", "version": "3.3.2.42"}, {"status": "affected", "version": "3.4.1.1"}, {"status": "affected", "version": "3.3.2.12"}, {"status": "affected", "version": "2.1.1.31"}, {"status": "affected", "version": "3.5.1.23"}, {"status": "affected", "version": "3.3.2.53"}, {"status": "affected", "version": "3.4.1.14"}, {"status": "affected", "version": "3.3.2.2"}, {"status": "affected", "version": "3.4.1.20"}, {"status": "affected", "version": "3.3.2.35"}, {"status": "affected", "version": "2.2.1.34"}, {"status": "affected", "version": "1.102.21"}, {"status": "affected", "version": "3.3.2.5"}, {"status": "affected", "version": "3.5.1.31"}, {"status": "affected", "version": "3.6.1.5"}, {"status": "affected", "version": "3.2.1.31"}, {"status": "affected", "version": "3.5.1.37"}, {"status": "affected", "version": "3.4.1.40"}, {"status": "affected", "version": "3.6.1.17"}, {"status": "affected", "version": "3.6.1.21"}, {"status": "affected", "version": "3.2.1.32"}, {"status": "affected", "version": "3.2.1.33"}, {"status": "affected", "version": "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": "2026-08-19T17:18:40.127", "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-csw1-shSvndWP", "source": "psirt@cisco.com"}, {"url": "https://www.cve.org/Media/News/item/blog/2026/06/16/Preserving-Vulnerability-Level-Identification", "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "psirt@cisco.com", "description": [{"lang": "en", "value": "CWE-20"}]}], "descriptions": [{"lang": "en", "value": "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.\r\n\r\nThe vulnerabilities tracked by CVE-2026-20318 are related to improper input validation issues that are grouped under the Common Weakness Enumeration (CWE) CWE-20."}], "lastModified": "2026-08-20T16:17:21.747", "sourceIdentifier": "psirt@cisco.com"}