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Vulnerability IntelligenceCVE-2026-48852

CVE-2026-48852

LOW3.7

PuTTY 0

Published May 25, 2026

Modified 4 weeks ago

Fix available

Details

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

Affected Packages

PuTTY release

Windows 10 (1507)Windows 10 (1607) / Server 2016Windows 10 (1809) / Server 2019Windows 10 (1903)Windows 10 (1909)

Fixed in:

0.84

References

WEB

https://lists.tartarus.org/pipermail/putty-announce/2026/000042.html

WEB

https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/ecdsa-remotely-triggerable-assertion.html

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-48852

CVSS Analysis

CVSS v3.1

3.7

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

HighAC:H

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

UnchangedS:U

Impact

Confidentiality

NoneC:N

Integrity

NoneI:N

Availability

LowA:L

3.7/CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Weakness Type (CWE)

Other

CWE-617

Ecosystems(19)

Windows 10 (1507)Windows 10 (1607) / Server 2016 Windows 10 (1809) / Server 2019 Windows 10 (1903)Windows 10 (1909)

Timeline

PublishedMay 25, 2026

ModifiedMay 26, 2026

CVE-2026-48852 | Mondoo Vulnerability Intelligence