Buffer Overflow Vulnerability in MobaXterm by Mobatek
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?

MobaXterm 12.1 has a structured exception handling (SEH) based buffer overflow vulnerability in the username field of session files. This flaw can be exploited by remote attackers through a specially crafted session file, which, when imported, triggers the buffer overflow and allows the execution of arbitrary code. This can enable attackers to gain unauthorized reverse shell access with the privileges of the user executing the session.

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
.