TrueConf Client Application Update code download

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in TrueConf Client. The impacted element is an unknown function of the component Application Update Handler. The manipulation results in code download. This vulnerability is known as CVE-2026-3502. Access to the local network is required for this attack. Furthermore, an exploit is available.

Detailsinfo

A vulnerability classified as problematic has been found in TrueConf Client (unknown version). Affected is an unknown code block of the component Application Update Handler. The manipulation with an unknown input leads to a code download vulnerability. CWE is classifying the issue as CWE-494. The product downloads source code or an executable from a remote location and executes the code without sufficiently verifying the origin and integrity of the code. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at trueconf.com. This vulnerability is traded as CVE-2026-3502 since 03/03/2026. The exploitability is told to be easy. Access to the local network is required for this attack. The exploitation requires an enhanced level of successful authentication. Technical details are unknown but an exploit is available. The MITRE ATT&CK project declares the attack technique as T1495.

It is declared as attacked. The vulnerability scanner Nessus provides a plugin with the ID 320363 (TrueConf Windows Client < 8.5.3.884 Download of Code Without Integrity Check Vulnerability (CVE-2026-3502)), which helps to determine the existence of the flaw in a target environment. This issue was added on 04/02/2026 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 04/16/2026:

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Zero-Day.cz (1084) and Tenable (320363). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.0
VulDB Meta Temp Score: 6.0

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.8
CNA Vector (checkpoint): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Code download
CWE: CWE-494
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Attacked

EPSS Score: 🔒
EPSS Percentile: 🔒

KEV Added: 🔒
KEV Due: 🔒
KEV Remediation: 🔒
KEV Ransomware: 🔒
KEV Notice: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 320363
Nessus Name: TrueConf Windows Client < 8.5.3.884 Download of Code Without Integrity Check Vulnerability (CVE-2026-3502)

Zero-Day.cz: 🔒

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

03/03/2026 CVE reserved
03/30/2026 +26 days Advisory disclosed
03/30/2026 +0 days VulDB entry created
06/11/2026 +72 days VulDB entry last update

Sourcesinfo

Advisory: trueconf.com
Status: Confirmed

CVE: CVE-2026-3502 (🔒)
GCVE (CVE): GCVE-0-2026-3502
GCVE (VulDB): GCVE-100-354240
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 03/30/2026 20:55
Updated: 06/11/2026 01:25
Changes: 03/30/2026 20:55 (61), 04/02/2026 22:50 (15), 05/10/2026 09:15 (2), 06/11/2026 01:25 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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