CVE-2019-3855 HIGH

CVE-2019-3855

Vendor The Libssh2 Project
Product libssh2
Weakness CWE-190
Published March 21, 2019
Last update December 17, 2025
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction Required
Confidentiality High
Integrity High

CVSS vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.

Key dates

02Disclosure timeline

March 21, 2019 CVE published
December 17, 2025 Record updated