4.9Medium
Samba Samba
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.
What this means for your business
- It affects Samba. It matters if your company, or a supplier that handles your data, runs it.
- An attacker can use it remotely, over a network, with an administrator login, and without anyone at your company clicking anything.
What to do
- 1Check whether your company or your suppliers run Samba, and which version. The affected versions are listed further down this page.
- 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.
Not sure if your company is exposed?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
Scoring
- CVSS
- 4.9 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N- Weakness
- CWE-552
- Assigned by
- secalert@redhat.com
Dates
- Published
- 2025-06-06
- Last modified
- 2026-08-31
- Sources
- NVD
Affected products
- Samba Samba4.21.0 - 4.21.6, 4.22.0 - 4.22.2
As listed in the NVD configuration data. Not a statement about your estate.