Vulnary
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Critical· 9

CVE-2026-4480

A critical flaw in Samba’s printing subsystem allows attackers to inject shell commands through the job description field. The vulnerability arises because Samba forwards the client‑supplied description to the configured print command without escaping shell metacharacters. If exploited, an attacker can run arbitrary commands on the affected system.

publishedMay 26, 2026
last modifiedJul 24, 2026
sourcesNVD
severity · cvss
9
critical · how bad it is
exploitation · epss
14%
96th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Sep 7, 2026

No official fix yet. If none appears within 45 days of first tracking, this entry is removed automatically.

01

Who is affected

Red Hat OpenShift Container Platform 4.0; Samba; Red Hat Enterprise Linux 7.0, 8.0, 9.0, 10.0

02

Real-world impact

An attacker can send a specially crafted print job that contains shell metacharacters, causing the print command to execute those characters as code. This can lead to remote code execution, allowing the attacker to take full control of the system.

03

Why this severity

The CVSS score of 9 reflects that the vulnerability is exploitable over the network (AV:N), requires high attack complexity (AC:H), no user interaction (UI:N), and has a complete compromise impact (C:H, I:H, A:H). The attacker needs no privileges or authentication to exploit it.

04

What to do about it

no official fix yet

No official fix or mitigation is documented in the sources yet. Monitor the vendor advisory and apply the patch as soon as it is released.

No fix documented in sources

05

Timeline

  1. May 26, 2026 · May 26, 2026
    Published
    Disclosed and added to the National Vulnerability Database.
  2. Jul 24, 2026 · 11d ago
    Advisory updated
    The NVD record was last revised.
06

How it’s attacked

Attack vectorNetwork (remote)
Attack complexityHigh
Privileges requiredNone
User interactionNone needed
ScopeChanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
07

References & advisories

NVD advisory ↗Search advisories ↗
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →