TrueConf Client Download of Code Without Integrity Check Vulnerability
TrueConf — TrueConf Client
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.
7.8
5.8%
Vector breakdown
- Attack vector
- Adjacent
- Attack complexity
- Low
- Privileges required
- High
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- Low
CVSS:3.1/AV:A/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L
- Published
- Mar 30, 2026
- Modified
- Apr 3, 2026
- Added to KEV
- Apr 2, 2026
- Federal patch due
- Apr 16, 2026
CISA required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Weakness classification
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2026-3502, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2026-3502 were found at last check. Absence here is not proof no exploit exists - see the references below for vendor advisories and write-ups.
References
Frequently asked questions
What is CVE-2026-3502?
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.
How severe is CVE-2026-3502?
CVE-2026-3502 has a CVSS base score of 7.8 out of 10 (CVSS 3.1).
Is CVE-2026-3502 actively exploited in the wild?
Yes. CVE-2026-3502 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Apr 2, 2026, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2026-3502?
5.8% - meaning FIRST.org's EPSS model estimates a 5.8% probability this vulnerability will be exploited in the wild within 30 days (92% percentile among all scored CVEs).
What type of vulnerability is CVE-2026-3502?
CVE-2026-3502 is classified under CWE-494 (CWE-494: Download of Code Without Integrity Check.).
Cross-checked against
Impactr finds and proves whether CVE-2026-3502 - or flaws like it - are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.
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