Known exploited vulnerability
CVE-2026-3502
The short answer
CVE-2026-3502 affects TrueConf TrueConf Client and is rated high (CVSS 7.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2026-04-02: attackers are using it, so patch it first.
What it is
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.
Weakness: CWE-494.
Severity
7.8 high
CVSS:3.1/AV:A/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L
Exploited (CISA KEV)
Yes, since Apr 2, 2026
Federal due date Apr 16, 2026
EPSS, next 30 days
5.8%
Higher than 93% of scored CVEs
How it can be exploited
- Attack vector
- Adjacent network
- Attack complexity
- Low
- Privileges required
- High
- User interaction
- Required
- Scope
- Changed
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- Low
What CISA says to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected products
TrueConf Client. NVD's record lists the exact affected versions.
References
- trueconf.com/blog/update/trueconf-8-5 ProductRelease Notes
- research.checkpoint.com/2026/operation-truechaos-0-day-exploitation-against-southeast-asian-government-targets/ Third Party Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-3502 US Government Resource
Questions
Is CVE-2026-3502 being exploited?
Yes. CISA added CVE-2026-3502 to its Known Exploited Vulnerabilities catalog on 2026-04-02, with a federal remediation due date of 2026-04-16.
How do I fix CVE-2026-3502?
CISA's 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.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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