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CVE-2026-3502

TrueConf Client Download of Code Without Integrity Check

7.8 HIGHActively exploited (CISA KEV)EPSS 0.33%
  1. Published30 Mar 2026
  2. Added to CISA KEV2 Apr 2026
  3. Remediation due16 Apr 2026
Actively exploited (CISA KEV)

TrueConf Client contains a download of code without integrity check vulnerability. 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.

Added to KEV: 2 Apr 2026Federal remediation due: 16 Apr 2026

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.

CVSS 3.1 breakdown

Attack vectorAdjacent
Attack complexityLow
Privileges requiredHigh
User interactionRequired
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityLow
CVSS:3.1/AV:A/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L

Affected products

Trueconf< 8.5.3.884

Remediation

Fixed in
Trueconf≥ 8.5.3.884

References

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Frequently asked

Is CVE-2026-3502 being actively exploited?

Yes. CVE-2026-3502 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 2 Apr 2026.

How severe is CVE-2026-3502?

CVE-2026-3502 has a CVSS 3.1 base score of 7.8, rated high. EPSS estimates a 0.33% probability of exploitation.

Which products are affected by CVE-2026-3502?

Affected products include Trueconf.

How do I fix CVE-2026-3502?

Upgrade affected software to a fixed version, for example Trueconf 8.5.3.884 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-3502 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.