What is CVE-2022-45141?

CVE-2022-45141 is a critical-severity vulnerability in Samba, classified under Use of Weak Hash. CVSS score: 9.8/10. Published 2023-03-06.

How severe is CVE-2022-45141?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2022-45141 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Samba

CVE-2022-45141

Since the Windows Kerberos RC4-HMAC Elevation of Privilege Vulnerability was disclosed by Microsoft on Nov 8 2022 and per RFC8429 it is assumed that rc4-hmac is weak, Vulnerable Samba Active Directory DCs will issue rc4-hmac encrypted tickets despite the target server supporting better encryption (eg aes256-cts-hmac-sha1-96).

Published 2023-03-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (36.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Samba
Samba — versions Fixed in samba 4.15.13, samba 4.16.8, samba 4.15.13

Weakness classification (CWE)

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

www.samba.org/samba/security/CVE-2022-45141.html (Vendor Advisory)
security.gentoo.org/glsa/202309-06 (vendor-advisory)

Frequently asked questions

What is CVE-2022-45141?: CVE-2022-45141 is a critical-severity vulnerability in Samba, classified under Use of Weak Hash. CVSS score: 9.8/10. Published 2023-03-06.
How severe is CVE-2022-45141?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2022-45141 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.