What’s Vulnerable › Vulnerabilities

CVE-2021-28847

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-06-03 · updated 2026-06-17

Description

MobaXterm before 21.0 allows remote servers to cause a denial of service (Windows GUI hang) via tab title change requests that are sent repeatedly at high speed, which results in many SetWindowTextA or SetWindowTextW calls.

Affected products

• Mobatek MobaXterm: before 21.0 — fixed in 21.0

How to fix

Upgrade to a fixed version: Mobatek MobaXterm 21.0. Check the vendor advisory for mitigations.

References

• https://mobaxterm.mobatek.net/download-home-edition.html
• https://mobaxterm.mobatek.net/preview.html
• https://mobaxterm.mobatek.net/download-home-edition.html
• https://mobaxterm.mobatek.net/preview.html

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