CVE-2019-25741CWE-120

Mobatek MobaXterm 12.1 Buffer Overflow via Sessions File

Critical · published June 4, 2026

CVSS v4.0
9.3
EPSS
1%
Percentile
49.9
In the wild
Unconfirmed
What it is

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 record
Technical detail
CVSS v4.0
9.3 · CRITICAL
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00638 · 49.9th percentile
Weakness
CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Published
2026-06-04T13:22Z
EPSS history
Timeline
  • 04 JUN 13:22Z
    Mobatek MobaXterm 12.1 Buffer Overflow via Sessions File
    cvelistv5