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Vulnerabilities

Vulnerability · CVE-2026-4480

A flaw was found in the Samba printing subsystem.

Published May 26, 2026 · catalog updated Sep 1, 2026 · openshift container platform

Patch now

CVE-2026-4480 is in the CISA known-exploited catalog. Confirm openshift container platform against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Critical9.0
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
13.93%
Remediation
Remediation guidance
Affected products
cpe redhat/enterprise linux · cpe redhat/openshift container platform · cpe samba/samba · vendor Red Hat openshift_container_platform

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. Initial-access exploit intelligence.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe redhat/enterprise linux10.0
  • cpe redhat/enterprise linux7.0
  • cpe redhat/enterprise linux8.0
  • cpe redhat/enterprise linux9.0
  • cpe redhat/openshift container platform4.0
  • cpe samba/sambaversion unspecified
  • vendor Red Hat openshift_container_platformversion unspecified

How to fix CVE-2026-4480

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2026-4480 is in the CISA known-exploited catalog. Confirm openshift container platform against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with redhat/enterprise linux 10.0; redhat/enterprise linux 7.0; redhat/enterprise linux 8.0; redhat/enterprise linux 9.0. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

CWE-78: OS Command Injection. EPSS 13.93%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Kubernetes security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. May 26, 2026 · NIST NVD

    Detected

    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

  2. Jul 20, 2026 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

  3. Sep 1, 2026 · NIST NVD

    Updated

    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

Sources

  • CVE.orgVulnerability recordCVE-2026-4480

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-4480

    30-day exploitation probability 13.9%

    first.org
  • NIST NVDVulnerability recordCVE-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

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-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

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.