Is CVE-2021-33500 actively exploited?

CVE-2021-33500 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2021-33500?

CVE-2021-33500 has a CVSS score of 7.5 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2021-33500?

Patch guidance is available from putty security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-33500.

Fix CVE-2021-33500 - HIGH putty putty

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: NVD-CWE-noinfo

Metadata

Primary Vendor: PUTTY
Published: 5/21/2021
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2021-33500

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary