How severe is CVE-2025-0620?

CVE-2025-0620 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-0620 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-0620?

CVE-2025-0620 affects Samba. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-0620?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-0620 have an EU (EUVD) identifier?

Yes. CVE-2025-0620 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-17307.

When was CVE-2025-0620 published?

CVE-2025-0620 was published on 2025-06-06 and last updated on 2026-06-30.

CVE-2025-0620

CVE-2025-0620 is a medium-severity vulnerability in Samba with a CVSS 3.x base score of 4.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-552.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-17307
Weakness: CWE-552
Affected product: Samba
Published: 2025-06-06
Last modified: 2026-06-30

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.

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 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-0620 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-0620?: CVE-2025-0620 affects Samba. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-0620?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-0620 have an EU (EUVD) identifier?: Yes. CVE-2025-0620 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-17307.
When was CVE-2025-0620 published?: CVE-2025-0620 was published on 2025-06-06 and last updated on 2026-06-30.

References

Affected products (1)

cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*

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