Is CVE-2016-2126 in the CISA KEV catalog?

No. CVE-2016-2126 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-2126?

CVE-2016-2126 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2016-2126?

CVE-2016-2126 has an EPSS score of 6.59% (93th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-2126?

Upgrade samba on debian 11 to 2:4.5.2+dfsg-2 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2016-2126

MEDIUMEPSS 93th pctl

6.5

CVSS v3

NVD

Description

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.

CWE-264Permissions, Privileges, and Access Controls

How to fix

Remediation Available

sambaDebian

Fixed in:2:4.5.2+dfsg-2CVE-2016-2126

libsmbclientUbuntu

Fixed in:2:4.3.11+dfsg-0ubuntu0.14.04.4USN-3158-1

Fixed in:2:4.3.11+dfsg-0ubuntu0.16.04.3USN-3158-1

sambaUbuntu

Fixed in:2:4.3.11+dfsg-0ubuntu0.14.04.4USN-3158-1

Fixed in:2:4.3.11+dfsg-0ubuntu0.16.04.3USN-3158-1

winbindUbuntu

Fixed in:2:4.3.11+dfsg-0ubuntu0.14.04.4USN-3158-1

Fixed in:2:4.3.11+dfsg-0ubuntu0.16.04.3USN-3158-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

6.59%probability of exploitation in 30 days

93rdpercentile

High risk: more likely to be exploited than 93% of all known CVEs.

References

Vendor Advisory1

samba.org

Third-Party Advisory8

Related Vulnerabilities

Other CWE-264 (Permissions, Privileges, and Access Controls) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2012-1456	Medium	4.3	100%	-	-
CVE-2012-1459	Medium	4.3	100%	-	Fix
CVE-2012-1446	Medium	4.3	100%	-	-
CVE-2012-1443	Medium	4.3	100%	-	-
CVE-2012-1442	Medium	4.3	99%	-	-
CVE-2012-1457	Medium	4.3	98%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.