Cyber Resilience

CVE-2021-33500

HighPublic PoC

Published: 21 May 2021

Published
21 May 2021
Modified
21 November 2024
KEV Added
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Patch
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CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0040 61.1th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-33500 is a high-severity an unspecified weakness vulnerability in Putty Putty. Its CVSS base score is 7.5 (High).

Operationally, ranked in the top 38.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

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…

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same attack methodology may affect some OS-level GUIs on Linux or other platforms for similar reasons.

CWE(s)
NVD-CWE-noinfo

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

putty
putty
≤ 0.75

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References