UpHeron
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Servers and applications

CVE-2016-2126

Samba version 4.0.0 up to 4.5.2 is vulnerable to privilege elevation due to incorrect handling of the PAC (Privilege Attribute Certificate) checksum. A remote, authenticated, attacker can cause the winbindd process to crash using a legitimate Kerberos ticket. A local service with access to the winbindd privileged pipe can cause winbindd to cache elevated access permissions.

Severity
Medium 6.5
Published
11 May 2017
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
4.3.13, 4.4.8, 4.5.3
Exploit chance
6.6% in the next 30 daysHigher than 93% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness
CWE-264
Attack
Over the network · Needs a user account · No user action needed
Attacker can
Take it down
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Sources
NVD

Affected software

SoftwareAffected versions
SambaServers and applications · cpe:a:samba:samba
  • From 4.0.0 before 4.3.13
  • From 4.4.0 before 4.4.8
  • From 4.5.0 before 4.5.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2016-2126
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2016-2126