Threat Intelligence / CVE / CVE-2026-4480

CVE-2026-4480 — Red Hat Enterprise Linux 10

CVSS v3.1 8.5 (HIGH) · EPSS 0.0% (higher than 20.6% of all scored CVEs) · Priority 5.1/10 · Published 2026-05-26

As of 2026-05-27, CVE-2026-4480 is a HIGH-severity vulnerability in Red Hat Enterprise Linux 10, CVSS v3.1 8.5, EPSS 0.0% (20.6th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-4480, most recently “Samba Printing Subsystem Remote Code Execution — CVE-2026-4480 (%J Print-Job Description Command Injection, CVSS 10.0, Unauthenticated)”.

Last updated: 2026-05-27

What is CVE-2026-4480?

A flaw was found in the Samba printing subsystem. Samba passes the client-controlled job description string to the command configured with the "print command" setting via the "%J" substitution character without escaping shell meta characters. A remote attacker could exploit this vulnerability by sending a specially crafted print job description that contains unescaped shell characters. This could lead to remote code execution on the affected system.

The record classifies CVE-2026-4480 under weakness class CWE-78. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 6 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 109 days ago.

Severity and exploitation probability

CVSS v3.1 base score: 8.5 — HIGH
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS (FIRST): 0.0% probability of exploitation in the next 30 days, higher than 20.6% of all scored CVEs
CISA KEV: Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority: 5.1/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published: 2026-05-26, last modified 2026-05-27

Is CVE-2026-4480 being exploited?

It currently carries a trending score of 13 in the Threadlinqs vulnerability feed.

Affected products and versions

Red Hat: Enterprise Linux 10, Enterprise Linux 8, Enterprise Linux 9, Enterprise Linux 6, Enterprise Linux 7, OpenShift Container Platform 4

How to fix CVE-2026-4480

No vendor patch reference has been recorded for CVE-2026-4480 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-4480

1 tracked threat in the Threadlinqs corpus references CVE-2026-4480, either in the campaign’s CVE list or as an indicator on the campaign record.

Samba Printing Subsystem Remote Code Execution — CVE-2026-4480 (%J Print-Job Description Command Injection, CVSS 10.0, Unauthenticated) — CRITICAL · 2026-05-29

Sources

Seeded from cveorg and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.

Full detection coverage & IOCs for threats exploiting CVE-2026-4480 are available via the Threadlinqs MCP server (Purple tier). View plans →

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