PuTTY 0.71 before 0.84 has an assertion failure in ECDSA signature verification.

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.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
PuTTY PuTTY unaffected
Version Status Constraints
0.71 affected < 0.84

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Putty Subscribe
Putty Subscribe

Project Subscriptions

Vendors Products
Putty Subscribe
Putty Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://lists.tartarus.org/pipermail/putty-announce/2026/000042.html cve-icon
https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/ecdsa-remotely-triggerable-assertion.html cve-icon
History

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

Type Values Removed Values Added
Description PuTTY 0.71 before 0.84 has an assertion failure in ECDSA signature verification.
First Time appeared Putty
Putty putty
Weaknesses CWE-617
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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-05-25T20:19:20.809Z

Reserved: 2026-05-25T20:19:20.308Z

Link: CVE-2026-48852

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-25T21:30:05Z

Weaknesses