CVE-2026-3502

TrueConf Client Update Integrity Verification Bypass

CVSS 3.1 High 7.8Known exploited (CISA KEV)

CVSS:3.1/AV:A/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L

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.

Key data

CVSS 3.1 High 7.8

Score published by checkpoint in the CVE record.

CVSS:3.1/AV:A/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:L

Attack vector: Adjacent
The attacker needs to be on the same shared network segment or a closely related one.
Attack complexity: Low
No special conditions are needed. The attack can be repeated at will.
Privileges required: High
An account with significant privileges, such as an administrator, is needed.
User interaction: Required
A user has to do something first, such as opening a file or following a link.
Scope: Changed
The impact can reach other components beyond the vulnerable one.
Confidentiality impact: High
Serious or total effect on the secrecy of data.
Integrity impact: High
Serious or total effect on the trustworthiness of data.
Availability impact: Low
Limited effect on availability.

Metric	Value	What it means
Attack vector	Adjacent	The attacker needs to be on the same shared network segment or a closely related one.
Attack complexity	Low	No special conditions are needed. The attack can be repeated at will.
Privileges required	High	An account with significant privileges, such as an administrator, is needed.
User interaction	Required	A user has to do something first, such as opening a file or following a link.
Scope	Changed	The impact can reach other components beyond the vulnerable one.
Confidentiality impact	High	Serious or total effect on the secrecy of data.
Integrity impact	High	Serious or total effect on the trustworthiness of data.
Availability impact	Low	Limited effect on availability.

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at first.org/cvss.

EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score: 0.05845 (5.8% probability)
Percentile: 93.2%
Scores of: Nov 10, 2026
Model: v2026.06.15

CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.

Name in the catalog: TrueConf Client Download of Code Without Integrity Check Vulnerability
Added to the catalog: Apr 2, 2026
Federal due date: Apr 16, 2026

CISA assessment as of Mar 31, 2026

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Exploitation: Recorded by CISA as active
Automatable: no
Technical impact: total

Weakness (CWE)

CWE catalog version 5.0.

CWE-494Download of Code Without Integrity Check

Affected products

Products listed in the CVE record, as the CNA published them.

TrueConf Client
- affected: TrueConf Client versions 8.1.0 through 8.5.2

References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

trueconf.com/blog/update/trueconf-8-5

Timeline

ID reservedMar 3, 2026
Record publishedMar 30, 2026
Added to CISA KEVApr 2, 2026
Record last updatedApr 3, 2026

Look up another CVE

About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

Cloud VPS DDoS protection

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:12 UTC. Sources and licenses