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CVE-2026-4480

Samba remote code execution

9.0 CRITICALEPSS 13.9%
  1. Published26 May 2026

Description

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

Redhat Openshift Container Platform4.0
Samba≥ 4.1.0 < 4.2.1
Redhat Enterprise Linux10.0 · 7.0 · 8.0 · 9.0

Remediation

Fixed in
Samba≥ 4.2.1

References

and 5 more references

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Frequently asked

Is CVE-2026-4480 being actively exploited?

CVE-2026-4480 is not in the CISA KEV catalog. Its EPSS exploit probability is 13.9%.

How severe is CVE-2026-4480?

CVE-2026-4480 has a CVSS 3.1 base score of 9.0, rated critical. EPSS estimates a 13.9% probability of exploitation.

Which products are affected by CVE-2026-4480?

Affected products include Redhat Openshift Container Platform, Samba, Redhat Enterprise Linux.

How do I fix CVE-2026-4480?

Upgrade affected software to a fixed version, for example Samba 4.2.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-4480 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.