CVE-2026-20313
Received Received - Intake

Improper Link Resolution Before File Access in Cisco Catalyst SD-WAN

Publication date: 2026-08-05

Last updated on: 2026-08-05

Assigner: Cisco Systems, Inc.

Description
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Catalyst SD-WAN 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-2026-20313 are related to Improper link resolution before file access issues that are grouped under the Common Weakness Enumeration (CWE) CWE-1284.

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Meta Information

Published
2026-08-05
Last Modified
2026-08-05
Generated
2026-08-05
AI Q&A
2026-08-05
EPSS Evaluated
N/A
NVD
CVE-2026-20313
EUVD
EUVD-2026-53476

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
cisco catalyst_sd-wan *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-1284 The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.

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Executive Summary

CVE-2026-20313 is an Improper link resolution before file access vulnerability in Cisco Catalyst SD-WAN. It allows attackers to exploit weak link handling to potentially access unauthorized files. The issue is classified under CWE-1284 and has a CVSS score of 7.7, indicating high impact on availability.

Detection Guidance

The provided CVE data does not include specific detection methods or commands for identifying CVE-2026-20313 on a network or system. Cisco's advisory may contain general guidance, but no details are provided here.

Impact Analysis

This vulnerability could allow unauthorized file access or disruption of services in Cisco Catalyst SD-WAN environments. Attackers might exploit it to cause denial-of-service conditions or gain access to sensitive data, depending on the system configuration.

Compliance Impact

The provided CVE data does not specify direct impacts on compliance with standards like GDPR or HIPAA. The vulnerability involves improper link resolution before file access (CWE-1284), which could potentially lead to unauthorized access or denial of service. Such issues may indirectly affect compliance by compromising data integrity or availability, but no explicit details are provided.

Mitigation Strategies

Apply the latest Cisco Catalyst SD-WAN software updates provided by Cisco to address the Improper link resolution before file access vulnerability. Monitor Cisco's security advisories for patches and follow their hardening recommendations.

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