TeamViewer DEX Client up to 26.0 on Windows RPC link following

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in TeamViewer DEX Client up to 26.0 on Windows. The impacted element is an unknown function of the component RPC Handler. Executing a manipulation can lead to link following. This vulnerability is tracked as CVE-2026-23563. The attack is restricted to local execution. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in TeamViewer DEX Client up to 26.0 on Windows and classified as critical. This vulnerability affects an unknown functionality of the component RPC Handler. The manipulation with an unknown input leads to a link following vulnerability. The CWE definition for the vulnerability is CWE-59. The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Improper Link Resolution Before File Access (invoked by 1E‑Explorer‑TachyonCore‑DeleteFileByPath instruction) in TeamViewer DEX - 1E Client before version 26.1 on Windows allows a low‑privileged local attacker to delete protected system files via a crafted RPC control junction or symlink that is followed when the delete instruction executes.

The weakness was disclosed with Lockheed Martin Red Team. The advisory is shared for download at teamviewer.com. This vulnerability was named CVE-2026-23563 since 01/14/2026. The exploitation appears to be difficult. The attack needs to be approached locally. Additional levels of successful authentication are required for exploitation. There are neither technical details nor an exploit publicly available.

Upgrading to version 26.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CNNVD (CNNVD-202601-4960). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 6.4
VulDB Temp Score: 6.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.1
NVD Vector: 🔒

CNA Base Score: 5.7
CNA Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Link following
CWE: CWE-59
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: DEX Client 26.1

Timelineinfo

01/14/2026 CVE reserved
01/29/2026 +15 days Advisory disclosed
01/29/2026 +0 days VulDB entry created
02/12/2026 +14 days VulDB entry last update

Sourcesinfo

Advisory: teamviewer.com
Organization: Lockheed Martin Red Team
Status: Confirmed

CVE: CVE-2026-23563 (🔒)
GCVE (CVE): GCVE-0-2026-23563
GCVE (VulDB): GCVE-100-343372
CNNVD: CNNVD-202601-4960 - TeamViewer DEX Client 安全漏洞

Entryinfo

Created: 01/29/2026 10:13
Updated: 02/12/2026 01:57
Changes: 01/29/2026 10:13 (65), 01/30/2026 15:57 (6), 01/31/2026 20:13 (1), 02/01/2026 15:13 (1), 02/12/2026 01:57 (11)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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