VULNERABILITY INTELLIGENCE

CVE-2021-33500

CVSS score7.5 HIGH
EPSS probability1.91%
CISA KEVNot currently listed
Published2021-05-21
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

PuTTY before 0.75 on Windows allows remote servers to cause a denial of service (Windows GUI hang) by telling the PuTTY window to change its title repeatedly at high speed, which results in many SetWindowTextA or SetWindowTextW calls. NOTE: the same attack methodology may affect some OS-level GUIs on Linux or other platforms for similar reasons.

Weakness classification

  • nvd@nist.gov: NVD-CWE-noinfo

Primary references