Mobatek MobaXterm 12.1 Username buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.4$0-$5k0.64

Summaryinfo

A vulnerability categorized as critical has been discovered in Mobatek MobaXterm 12.1. Affected is an unknown function. The manipulation of the argument Username results in buffer overflow. This vulnerability is cataloged as CVE-2019-25741. The attack may be launched remotely. Furthermore, there is an exploit available.

Detailsinfo

A vulnerability classified as critical has been found in Mobatek MobaXterm 12.1. Affected is an unknown functionality. The manipulation of the argument username with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Mobatek MobaXterm 12.1 contains a structured exception handling (SEH) based buffer overflow vulnerability in the username field of session files that allows remote attackers to execute arbitrary code. Attackers can craft a malicious MobaXterm sessions file with overflow data that triggers the vulnerability when imported and executed, enabling reverse shell execution with user privileges.

The weakness was shared by Xavi Beltran as 47429. The advisory is available at exploit-db.com. This vulnerability is traded as CVE-2019-25741 since 06/04/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details and a public exploit are known.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept.

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

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Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.4

VulDB Base Score: 9.8
VulDB Temp Score: 8.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.8
CNA Vector (VulnCheck): 🔒

CVSSv2info

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

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

06/04/2026 Advisory disclosed
06/04/2026 +0 days CVE reserved
06/04/2026 +0 days VulDB entry created
06/04/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: 47429
Researcher: Xavi Beltran
Status: Not defined

CVE: CVE-2019-25741 (🔒)
GCVE (CVE): GCVE-0-2019-25741
GCVE (VulDB): GCVE-100-368334
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 06/04/2026 16:03
Changes: 06/04/2026 16:03 (80)
Complete: 🔍
Cache ID: 216::103

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