CVE-2026-3502 TrueConf Vulnerability Added to KEV Catalog

CISA ICS-CERT Advisories

Published April 2nd, 2026

Detected April 2nd, 2026

Summary

CISA added CVE-2026-3502, a TrueConf Client vulnerability involving code download without integrity verification, to its Known Exploited Vulnerabilities (KEV) catalog based on evidence of active exploitation. The vulnerability poses significant risk as a frequent attack vector for malicious cyber actors. Although Binding Operational Directive 22-01 only mandates remediation for Federal Civilian Executive Branch agencies, CISA strongly urges all organizations to prioritize timely remediation.

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What changed

CISA has added one new vulnerability to its Known Exploited Vulnerabilities catalog: CVE-2026-3502 affecting TrueConf Client. This vulnerability involves the download of code without integrity checking, allowing potential attackers to deliver malicious code undetected. The addition is based on evidence of active exploitation in the wild, indicating current threat activity.

Organizations using TrueConf Client software should immediately verify whether their systems are affected and apply patches or mitigation measures without delay. Federal Civilian Executive Branch agencies are subject to mandatory remediation timelines under BOD 22-01. All other organizations are strongly encouraged by CISA to treat KEV catalog vulnerabilities as priority items in their vulnerability management programs given the confirmed active exploitation status.

What to do next

Identify if your organization uses TrueConf Client software
Check for affected versions of CVE-2026-3502
Apply vendor patches or implement compensating controls immediately if vulnerable

Source document (simplified)

Alert

CISA Adds One Known Exploited Vulnerability to Catalog

Release Date

April 02, 2026

CISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation.

CVE-2026-3502 TrueConf Client Download of Code Without Integrity Check Vulnerability This type of vulnerability is a frequent attack vector for malicious cyber actors and poses significant risks to the federal enterprise.

Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities established the KEV Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal enterprise. BOD 22-01 requires Federal Civilian Executive Branch (FCEB) agencies to remediate identified vulnerabilities by the due date to protect FCEB networks against active threats. See the BOD 22-01 Fact Sheet for more information.

Although BOD 22-01 only applies to FCEB agencies, CISA strongly urges all organizations to reduce their exposure to cyberattacks by prioritizing timely remediation of KEV Catalog vulnerabilities as part of their vulnerability management practice. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria.

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