Summaryinfo

A vulnerability described as problematic has been identified in TrueConf Client. The impacted element is an unknown function of the component Application Update Handler. The manipulation results in code download. This vulnerability is known as CVE-2026-3502. Access to the local network is required for this attack. No exploit is available.

Detailsinfo

A vulnerability classified as problematic has been found in TrueConf Client (unknown version). Affected is an unknown code block of the component Application Update Handler. The manipulation with an unknown input leads to a code download vulnerability. CWE is classifying the issue as CWE-494. The product downloads source code or an executable from a remote location and executes the code without sufficiently verifying the origin and integrity of the code. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

TrueConf Client downloads application update code and applies it without performing verification. An attacker who is able to influence the update delivery path can substitute a tampered update payload. If the payload is executed or installed by the updater, this may result in arbitrary code execution in the context of the updating process or user.

The advisory is shared for download at trueconf.com. This vulnerability is traded as CVE-2026-3502 since 03/03/2026. The exploitability is told to be easy. Access to the local network is required for this attack. The exploitation requires an enhanced level of successful authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1495.

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

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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• TrueConf

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• Client

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