P4Verified

CVE-2019-3859: libssh2 1.8.1; +7 more affected products

CVE-2019-3859. CVSS 3.1 base score 9.1 (CRITICAL, Source advisory). EPSS 0.06275 (percentile 0.93436), scored 13-Oct-2026.

Affected technology

libssh2 · before 1.8.1 (exclusive)
libssh2

fedora · 28
fedoraproject

fedora · 29
fedoraproject

debian linux · 8.0
debian

debian linux · 9.0
debian

ontap select deploy administration utility · Version not applicable in the source CPE
netapp

leap · 15.0
opensuse

leap · 42.3
opensuse

libssh2 · 1.8.1
The libssh2 Project

SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · V3.1.0 to before V3.1.5
Siemens

SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · V3.1.0 to before V3.1.5
Siemens

SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · V3.1.0 to before V3.1.5
Siemens

Description’s affected range: before 1.8.1 in the _libssh2_packet_require and _libssh2_packet_requirev functions

Component: Not specified by the source

Attack conditions (Source advisory, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

The source reports that an attacker could disrupt service. Source advisory’s CVSS 3.1 assessment (base score 9.1/10) rates confidentiality and availability impact as high; integrity impact as none.

Published 14-Oct-2026 15:58 UTC

CWE: CWE-125
CCR priority: 38.0 /100 (P4)
CVSS 3.1: 9.1 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H · Source advisory
EPSS: 0.06275 · percentile 0.93436 · 2026-10-13
KEV: no

Provenance

GitHub Advisory Database · Source record · observed 2026-10-14 16:01:16.619248+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-14 15:56:36.793806+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2019-3859.html