CVE-2025-0620
MEDIUMCVSS 4.9/10EPSS 0.60%
Last modified
CVE-2025-0620 is a medium-severity vulnerability rated 4.9/10 on the CVSS scale. A flaw was found in Samba. The smbd service daemon does not pick up group membership changes when re-authenticating an expired SMB session. EPSS estimates a 0.60% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Samba | Samba | >= 4.21.0, < 4.21.6 |
| Samba | Samba | >= 4.22.0, < 4.22.2 |
References
- https://access.redhat.com/security/cve/CVE-2025-0620Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2370453Issue Tracking, Third Party Advisory
- https://www.samba.org/samba/security/CVE-2025-0620.htmlVendor Advisory
- http://www.openwall.com/lists/oss-security/2025/06/03/8Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2025-0620?
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.
How severe is CVE-2025-0620?
CVE-2025-0620 has a CVSS score of 4.9/10 (MEDIUM severity). The EPSS model estimates a 0.60% probability of exploitation in the next 30 days.
How do I fix CVE-2025-0620?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2025-0620?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST