CVE-2026-3012

MEDIUM
MEDIUM Priority: 0.02 BB Relevance: 49/100
Published: 2026-05-27 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Adjacent No Auth No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Adjacent
AC: High
PR: None
UI: None
S: Unchanged
C: High
I: High
A: None

Description

A flaw was found in Samba’s certificate auto-enrollment Group Policy handling. When certificate auto-enrollment is enabled, Samba may retrieve a CA certificate over an unencrypted HTTP connection and install it into the local trust store without proper verification. An attacker with the ability to intercept or redirect network traffic could exploit this behavior to supply a malicious certificate authority certificate, potentially allowing interception or spoofing of trusted communications.

Weakness Classification (1)

Affected Software (4)

VendorProductVersion
redhat enterprise_linux 7.0
redhat enterprise_linux 9.0
redhat openshift_container_platform 4.0
samba samba 4.16.0 – 4.21.0

Bug Bounty Relevance

49 / 100
✓ No authentication
✓ No user interaction

CVSS Score

6.8 / 10.0 v3.1
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS — Exploitation Probability

0.26%
Raw Score 0.002610
Percentile 17.9%
Date 2026-10-28

Intelligence Sources

nvd ref →