THREATPORT/VULNERABILITY/CVE-2016-2126
MEDIUM SEVERITY

CVE-2016-2126

Samba vulnerability

CVSS
6.5
EPSS
6.6%
EPSS pct
93th
Exploited
No known
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.
Affected vendor
Samba
Affected product
Samba
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness type (CWE)
  • CWE-264 — Permissions, Privileges, and Access Controls
Published
2017-05-11

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring low privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 6.6% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 93% of all scored CVEs.

Check your external exposure to CVE-2016-2126

  • Confirm whether Samba Samba is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2016-2126.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2016-2126

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2016-2126 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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