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CentOS Linux 7 [TuxCare] Security Update: cups / cups-client / cups-devel / cups-filesystem / cups-ipptool / etc (CENTOS7:CLSA-2026:1778662564)

medium Nessus Plugin ID 352176

Synopsis

The CentOS Linux host is missing one or more security updates.

Description

The CentOS Linux 7 host has packages installed that are affected by a vulnerability as referenced in the TuxCare CENTOS7:CLSA-2026:1778662564 advisory.

 - OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, CUPS daemon (cupsd) contains an authorization bypass vulnerability due to case- insensitive username comparison during authorization checks. The vulnerability allows an unprivileged user to gain unauthorized access to restricted operations by using a user with a username that differs only in case from an authorized user. At time of publication, there are no publicly available patches.
 (CVE-2026-27447)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages based on the guidance in TuxCare advisory CENTOS7:CLSA-2026:1778662564.

See Also

https://cve.tuxcare.com/els/releases/CLSA-2026:1778662564

http://www.nessus.org/u?2175e05b

Plugin Details

Severity: Medium

ID: 352176

File Name: tuxcare_centos_7_CLSA-2026-1778662564.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 9/30/2026

Updated: 9/30/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.5

Percentile: 51.98

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

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

CVSS Score Source: CVE-2026-27447

CVSS v3

Risk Factor: Medium

Base Score: 6.3

Temporal Score: 5.7

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list, Host/OS/extended-third-party

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/13/2026

Vulnerability Publication Date: 4/3/2026

Reference Information

CVE: CVE-2026-27447

CLSA: 2026:1778662564