Detections
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Linux Distros Unpatched Vulnerability : CVE-2026-52491

high Nessus Plugin ID 340107

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - An issue in libtiff 85f2ac8e0b01cb7db2bbecf4a3b891bdbef67938 allows an attacker to execute arbitrary code via the libtiff/tools/thumbnail.c: main() component (CVE-2026-52491)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2026-52491

https://security-tracker.debian.org/tracker/CVE-2026-52491

https://ubuntu.com/security/CVE-2026-52491

Plugin Details

Severity: High

ID: 340107

File Name: unpatched_CVE_2026_52491.nasl

Version: 1.4

Type: Local

Agent: unix

Family: Misc.

Published: 8/26/2026

Updated: 9/2/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.24

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2026-52491

CVSS v3

Risk Factor: High

Base Score: 8.4

Temporal Score: 7.7

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

Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:14.04:-:lts, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, cpe:/o:centos:centos:7, cpe:/o:centos:centos:8, cpe:/o:debian:debian_linux:12.0, cpe:/o:debian:debian_linux:13.0, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:canonical:ubuntu_linux:gdal, p-cpe:/a:canonical:ubuntu_linux:neuron, p-cpe:/a:canonical:ubuntu_linux:qtwebengine-opensource-src, p-cpe:/a:canonical:ubuntu_linux:texmaker, p-cpe:/a:canonical:ubuntu_linux:tiff, p-cpe:/a:centos:centos:libtiff-devel, p-cpe:/a:centos:centos:libtiff-static, p-cpe:/a:centos:centos:libtiff-tools, p-cpe:/a:centos:centos:libtiff, p-cpe:/a:centos:centos:mingw-libtiff, p-cpe:/a:centos:centos:mingw32-libtiff-static, p-cpe:/a:centos:centos:mingw32-libtiff, p-cpe:/a:centos:centos:mingw64-libtiff-static, p-cpe:/a:centos:centos:mingw64-libtiff, p-cpe:/a:debian:debian_linux:tiff, p-cpe:/a:redhat:enterprise_linux:libtiff-devel, p-cpe:/a:redhat:enterprise_linux:libtiff-static, p-cpe:/a:redhat:enterprise_linux:libtiff-tools, p-cpe:/a:redhat:enterprise_linux:libtiff, p-cpe:/a:redhat:enterprise_linux:mingw-libtiff, p-cpe:/a:redhat:enterprise_linux:mingw32-libtiff-static, p-cpe:/a:redhat:enterprise_linux:mingw32-libtiff, p-cpe:/a:redhat:enterprise_linux:mingw64-libtiff-static, p-cpe:/a:redhat:enterprise_linux:mingw64-libtiff

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 8/25/2026

Reference Information

CVE: CVE-2026-52491