PuTTY 0.72 before 0.84 has a double free in RSA KEX.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Putty
  • Putty

Configuration 1 [-]

cpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*

No data.

References
Link Providers
https://lists.tartarus.org/pipermail/putty-announce/2026/000042.html cve-icon cve-icon
https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/rsakex-double-free.html cve-icon cve-icon
History

Tue, 26 May 2026 13:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 25 May 2026 21:45:00 +0000

Type Values Removed Values Added
Title PuTTY RSA Key Exchange Double-Free Vulnerability

Mon, 25 May 2026 20:45:00 +0000

Type Values Removed Values Added
Description PuTTY 0.72 before 0.84 has a double free in RSA KEX.
First Time appeared Putty
Putty putty
Weaknesses CWE-415
CPEs cpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
Vendors & Products Putty
Putty putty
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'}
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-05-25T20:13:58.605Z

Updated: 2026-05-26T12:59:46.509Z

Reserved: 2026-05-25T20:13:58.149Z

Link: CVE-2026-48850

cve-icon Vulnrichment

Updated: 2026-05-26T12:59:43.767Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-25T21:16:35.267

Modified: 2026-05-27T19:14:46.450

Link: CVE-2026-48850

cve-icon Redhat

No data.