Cisco SD-WAN Controller/SD-WAN Manager improper validation of specified quantity in input

Summaryinfo

A vulnerability, which was classified as very critical, was found in Cisco SD-WAN Controller and SD-WAN Manager. This impacts an unknown function. Such manipulation leads to improper validation of specified quantity in input. This vulnerability is listed as CVE-2026-20313. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in Cisco SD-WAN Controller and SD-WAN Manager (affected version not known). Affected by this issue is some unknown functionality. The manipulation with an unknown input leads to a improper validation of specified quantity in input vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at sec.cloudapps.cisco.com. This vulnerability is handled as CVE-2026-20313 since 10/08/2025. The exploitation is known to be easy. The attack may be launched remotely. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/05/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Network Management Software

Vendor

• Cisco

Name

• SD-WAN Controller
• SD-WAN Manager

License

• commercial

Website

• Vendor: https://www.cisco.com/

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