How severe is CVE-2026-3502?

CVE-2026-3502 has a CVSS 3.1 base score of 7.8 (HIGH). EPSS estimates a 0.3% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

CVE-2026-3502: TrueConf Client Update Integrity Verification

CISA Known Exploited Vulnerabilities

TrueConf Client Download of Code Without Integrity Check Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2026-04-02

Remediation due

2026-04-16

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.

CISA notes
https://trueconf.com/blog/update/trueconf-8-5 ; https://trueconf.com/downloads/windows.html ; https://nvd.nist.gov/vuln/detail/CVE-2026-3502

Description

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.

Severity

CVSS 3.1 · CNA7.8 HIGH

CVSS:3.1/AV:A/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L

SSVC · CISA-ADP

Exploitationactive

Automatableno

Technical impacttotal

Affected Products

Vendor	Product	Affected versions
TrueConf	TrueConf Client	TrueConf Client versions 8.1.0 through 8.5.2

References

1 Links

Other references

https://trueconf.com/blog/update/trueconf-8-5

Record Details

Published

2026-03-30

Last updated

2026-04-03

Assigner (CNA)

checkpoint

Credited to

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Related Tool Categories

Tool categories that test for or protect against this vulnerability class.

CWE-494 · Download of Code Without Integrity Check

Software Composition Analysis Tools

CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.