TeamViewer DEX up to 21.0 1E-Explorer-TachyonCore-LogoffUser input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.8$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in TeamViewer DEX up to 21.0. This impacts an unknown function of the component 1E-Explorer-TachyonCore-LogoffUser. Performing a manipulation results in input validation. This vulnerability was named CVE-2025-64990. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in TeamViewer DEX up to 21.0. This affects some unknown functionality of the component 1E-Explorer-TachyonCore-LogoffUser. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A command injection vulnerability was discovered in TeamViewer DEX (former 1E DEX), specifically within the 1E-Explorer-TachyonCore-LogoffUser instruction prior V21.1. Improper input validation, allowing authenticated attackers with Actioner privileges to inject arbitrary commands. Exploitation enables remote execution of elevated commands on devices connected to the platform.

The weakness was presented with Lockheed Martin Red Team. It is possible to read the advisory at teamviewer.com. This vulnerability is uniquely identified as CVE-2025-64990 since 11/12/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. Additional levels of successful authentication are necessary for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 21.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-202674). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.8

VulDB Base Score: 6.8
VulDB Temp Score: 6.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.2
NVD Vector: 🔒

CNA Base Score: 6.8
CNA Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
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 21.1

Timelineinfo

11/12/2025 CVE reserved
12/11/2025 +29 days Advisory disclosed
12/11/2025 +0 days VulDB entry created
01/15/2026 +35 days VulDB entry last update

Sourcesinfo

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

CVE: CVE-2025-64990 (🔒)
GCVE (CVE): GCVE-0-2025-64990
GCVE (VulDB): GCVE-100-335883
EUVD: 🔒

Entryinfo

Created: 12/11/2025 15:15
Updated: 01/15/2026 05:47
Changes: 12/11/2025 15:15 (63), 12/11/2025 15:56 (1), 01/15/2026 05:47 (11)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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