Cisco TelePresence Video Communication Server Expressway link following

Summaryinfo

A vulnerability, which was classified as very critical, has been found in Cisco TelePresence Video Communication Server Expressway. The impacted element is an unknown function. This manipulation causes link following. This vulnerability is registered as CVE-2026-76496. The attack needs to be launched locally. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco TelePresence Video Communication Server Expressway. It has been declared as very critical. Affected by this vulnerability is an unknown functionality. The manipulation with an unknown input leads to a link following vulnerability. The CWE definition for the vulnerability is CWE-59. The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Expressway Series software 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-2026-76496 are related to issues concerning improper link resolutions that are grouped under the Common Weakness Enumeration (CWE) Base CWE-59.

It is possible to read the advisory at sec.cloudapps.cisco.com. This vulnerability is known as CVE-2026-76496 since 08/19/2026. The exploitation appears to be easy. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/21/2026).

Upgrading eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Unified Communication Software

Vendor

• Cisco

Name

• TelePresence Video Communication Server Expressway

Version

• X8.1
• X8.1.1
• X8.1.2
• X8.2
• X8.2.1
• X8.2.2
• X8.5
• X8.5.1
• X8.5.2
• X8.5.3
• X8.6
• X8.6.1
• X8.7
• X8.7.1
• X8.7.2
• X8.7.3
• X8.8
• X8.8.1
• X8.8.2
• X8.8.3
• X8.9
• X8.9.1
• X8.9.2
• X8.10.0
• X8.10.1
• X8.10.2
• X8.10.3
• X8.10.4
• X8.11.0
• X8.11.1
• X8.11.2
• X8.11.3
• X8.11.4
• X12.5.0
• X12.5.1
• X12.5.2
• X12.5.3
• X12.5.4
• X12.5.5
• X12.5.6
• X12.5.7
• X12.5.8
• X12.5.9
• X12.6.0
• X12.6.1
• X12.6.2
• X12.6.3
• X12.6.4
• X12.7.0
• X12.7.1
• X14.0.0
• X14.0.1
• X14.0.2
• X14.0.3
• X14.0.4
• X14.0.5
• X14.0.6
• X14.0.7
• X14.0.8
• X14.0.9
• X14.0.10
• X14.0.11
• X14.2.0
• X14.2.1
• X14.2.2
• X14.2.5
• X14.2.6
• X14.2.7
• X14.3.0
• X14.3.1
• X14.3.2
• X14.3.3
• X14.3.4
• X14.3.5
• X14.3.6
• X14.3.7
• X15.0.0
• X15.0.1
• X15.0.2
• X15.0.3
• X15.2.0
• X15.2.1
• X15.2.2
• X15.2.3
• X15.2.4
• X15.2.4.
• X15.3.0
• X15.3.1
• X15.3.2
• X15.4.0
• X15.5.0
• X15.5.1
• X15.5.2
• X15.5.3

License

• commercial

Website

• Vendor: https://www.cisco.com/

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Entryinfo

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