Mobatek MobaXterm 12.1 Buffer Overflow via Sessions File
CVE-2019-25741

9.3CRITICAL

Key Information:

Vendor

Mobatek

Status
Mobatek Mobaxterm
Vendor
CVE Published:
4 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2019-25741?

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.

Affected Version(s)

Mobatek MobaXterm 12.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2019-25741 - Proof of Concept

References

https://www.exploit-db.com/exploits/47429
exploit
https://download.mobatek.net/1112019010310554/MobaXterm_P...
product
https://www.vulncheck.com/advisories/mobatek-mobaxterm-bu...
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Xavi Beltran
.