What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-04 · updated 2026-07-22
• Weakness: CWE-120

Description

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 products

• Mobatek MobaXterm: 12.1

References

• https://download.mobatek.net/1112019010310554/MobaXterm_Portable_v11.1.zip
• https://www.exploit-db.com/exploits/47429
• https://www.vulncheck.com/advisories/mobatek-mobaxterm-buffer-overflow-via-sessions-file

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