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CVE-2026-58221VulnerabilityPublished

Samba AD authenticated LDAP access domain takeover

Affects sambaSource GCVE Database

0

Not known to be exploited · fixed in 2:4.15.13+dfsg-0ubuntu1.13 : patch samba soon.

Data as of 25 Oct 2026, 10:17 UTC

Severity
High

Rated by Threat Radar · CVSS not yet scored by NVD

Patch
Available – fixed in 2:4.15.13+dfsg-0ubuntu1.13, 2:4.19.5+dfsg-4ubuntu9.7, 2:4.23.6+dfsg-1ubuntu2.2

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 28 Jul 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade the Ubuntu samba to 2:4.15.13+dfsg-0ubuntu1.13 (package) or 2:4.19.5+dfsg-4ubuntu9.7 (package) or 2:4.23.6+dfsg-1ubuntu2.2 (package).

Affected software

ProductAffectedFixed in
Ubuntu 26.04 LTSsambapkg:deb/ubuntu/samba@2:4.23.6+dfsg-1ubuntu2.2?arch=source&distro=resoluteOther threatsAffected
  • <2:4.23.6+dfsg-1ubuntu2.2
Fixed in
  • 2:4.23.6+dfsg-1ubuntu2.2
Ubuntu 24.04 LTSsambapkg:deb/ubuntu/samba@2:4.19.5+dfsg-4ubuntu9.7?arch=source&distro=nobleOther threatsAffected
  • <2:4.19.5+dfsg-4ubuntu9.7
Fixed in
  • 2:4.19.5+dfsg-4ubuntu9.7
Ubuntu 22.04 LTSsambapkg:deb/ubuntu/samba@2:4.15.13+dfsg-0ubuntu1.13?arch=source&distro=jammyOther threatsAffected
  • <2:4.15.13+dfsg-0ubuntu1.13
Fixed in
  • 2:4.15.13+dfsg-0ubuntu1.13
Ubuntu Pro 20.04 LTSsambapkg:deb/ubuntu/samba@2:4.15.13+dfsg-0ubuntu0.20.04.8+esm2?arch=source&distro=esm-infra/focalOther threatsAffected
  • 2:4.10.7+dfsg-0ubuntu2 – 2:4.15.13+dfsg-0ubuntu0.20.04.8+esm2
37 affected builds
Fixed in–
Ubuntu Pro 18.04 LTSsambapkg:deb/ubuntu/samba@2:4.7.6+dfsg~ubuntu-0ubuntu2.29+esm3?arch=source&distro=esm-infra/bionicOther threatsAffected
  • 2:4.6.7+dfsg-1ubuntu3 – 2:4.7.6+dfsg~ubuntu-0ubuntu2.29+esm3
32 affected builds
Fixed in–
Ubuntu Pro 16.04 LTSsambapkg:deb/ubuntu/samba@2:4.3.11+dfsg-0ubuntu0.16.04.34+esm4?arch=source&distro=esm-infra/xenialOther threatsAffected
  • 2:4.1.17+dfsg-4ubuntu2 – 2:4.3.11+dfsg-0ubuntu0.16.04.34+esm4
46 affected builds
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available and users should update Samba to the patched versions provided by Ubuntu for their respective releases. Specifically, update to samba package versions 2:4.15.13+dfsg-0ubuntu1.13 for Ubuntu 22.04 LTS, 2:4.19.5+dfsg-4ubuntu9.7 for Ubuntu 24.04 LTS, and 2:4.23.6+dfsg-1ubuntu2.2 for Ubuntu 26.04 LTS. Applying these updates will remediate the vulnerability.

Description

A vulnerability in Samba Active Directory allows low-privilege authenticated LDAP users to modify internal LDB special distinguished names, enabling a domain takeover. This issue affects multiple Ubuntu package versions of Samba. The vulnerability has been addressed in updated Samba packages for various Ubuntu LTS releases.

References

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