6.6
MEDIUM CVSS 3.1
CVE-2025-0620
Samba Group Membership Change Delayed Authentication Vulnerability
Description

A flaw was found in Samba. The smbd service daemon does not pick up group membership changes when re-authenticating an expired SMB session. This issue can expose file shares until clients disconnect and then connect again.

INFO

Published Date :

June 6, 2025, 2:15 p.m.

Last Modified :

Aug. 13, 2025, 3:12 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2025-0620 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Samba samba
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM [email protected]
CVSS 3.1 MEDIUM [email protected]
Solution
A vulnerability in Samba allows unauthorized access; updating to a patched version is recommended.
  • Update the Samba packages.
  • Upgrade to a patched version.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-0620.

URL Resource
https://access.redhat.com/security/cve/CVE-2025-0620 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2370453 Issue Tracking Third Party Advisory
https://www.samba.org/samba/security/CVE-2025-0620.html Vendor Advisory
http://www.openwall.com/lists/oss-security/2025/06/03/8 Mailing List Third Party Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-0620 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-0620 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-0620 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-0620 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Aug. 13, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
    Added CPE Configuration OR *cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* versions from (including) 4.21.0 up to (excluding) 4.21.6
    Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2025/06/03/8 Types: Mailing List, Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://access.redhat.com/security/cve/CVE-2025-0620 Types: Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://bugzilla.redhat.com/show_bug.cgi?id=2370453 Types: Issue Tracking, Third Party Advisory
    Added Reference Type Red Hat, Inc.: https://www.samba.org/samba/security/CVE-2025-0620.html Types: Vendor Advisory
  • New CVE Received by [email protected]

    Jun. 06, 2025

    Action Type Old Value New Value
    Added Description A flaw was found in Samba. The smbd service daemon does not pick up group membership changes when re-authenticating an expired SMB session. This issue can expose file shares until clients disconnect and then connect again.
    Added CVSS V3.1 AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
    Added CWE CWE-552
    Added Reference https://access.redhat.com/security/cve/CVE-2025-0620
    Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2370453
    Added Reference https://www.samba.org/samba/security/CVE-2025-0620.html
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Jun. 06, 2025

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2025/06/03/8
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 6.6
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact