Security Digest · Vulnerability record · Known exploited
CVE-2026-3502: TrueConf Client Download of Code Without Integrity Check Vulnerability
Exploited in the wild (CISA KEV). TrueConf Client downloads application update code and applies it without performing verification.
CISA KEV · added 2026-04-02 CVSS 7.8 High EPSS 0.3% · p25
Should you act?
Exploited: patch now if you run it
CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Yes, if you run TrueConf Client. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2026-04-02, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-04-16; treat that as the outer limit, not the target.
- EPSS 0.3%, percentile 25: FIRST’s model estimates a 0.3% chance of exploitation activity in the next 30 days, higher than 25% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Needs an account (high (admin)). Exposure depends on who can log in.
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.
CISA’s summary
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.
Weakness type: CWE-494.
Product: TrueConf Client · Assigned by: checkpoint · Published: 2026-03-30
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| TrueConf | TrueConf Client | TrueConf Client versions 8.1.0 through 8.5.2 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| checkpoint | 3.1 | 7.8 High | CVSS:3.1/AV:A/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L |
- Attack vector: adjacent network only
- Attack complexity: low
- Privileges required: high (admin)
- User interaction: required (a user must click/open something)
- Scope: changed (can affect other components)
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: added 2026-04-02; federal due date 2026-04-16. Known ransomware use: Unknown.
- 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.
- CISA SSVC assessment: exploitation active, automatable no, technical impact total.
- FIRST EPSS (model of 2026-10-21): 0.33% probability of exploitation activity in the next 30 days; percentile 25.
Timeline
- — CVE record published by checkpoint
- — Added to CISA’s Known Exploited Vulnerabilities catalog
- — CVE record last updated
- — CISA remediation deadline for US federal agencies
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
- Listed in CISA KEV notes (trueconf.com) trueconf.com
- Listed in CISA KEV notes (trueconf.com) trueconf.com
Vulnerability records
- CVE.org record CVE-2026-3502 cve.org
- NVD entry CVE-2026-3502 nvd.nist.gov
Government
Other references from the CVE record and advisory
- research.checkpoint.com research.checkpoint.com
All exploited TrueConf vulnerabilities · Today’s Security Digest