What is CVE-2020-25580?

CVE-2020-25580 is a medium-severity vulnerability in FreeBSD, classified under Incorrect Comparison. CVSS score: 5.3/10. Published 2021-03-26.

How severe is CVE-2020-25580?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in FreeBSD

CVE-2020-25580

In FreeBSD 12.2-STABLE before r369346, 11.4-STABLE before r369345, 12.2-RELEASE before p4 and 11.4-RELEASE before p8 a regression in the login.access(5) rule processor has the effect of causing rules to fail to match even when they should not. This means that rules denying access may be ignored.

Published 2021-03-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (52.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

FreeBSD — versions 11.4, 12.2
FreeBSD — versions FreeBSD 12.2-RELEASE before p4, 11.4-RELEASE before p8

Weakness classification (CWE)

CWE-697 — Incorrect Comparison

References

security.FreeBSD.org/advisories/FreeBSD-SA-21:03.pam_login_access.asc (Vendor Advisory)
security.netapp.com/advisory/ntap-20210423-0005/ (Third Party Advisory)

Frequently asked questions

What is CVE-2020-25580?: CVE-2020-25580 is a medium-severity vulnerability in FreeBSD, classified under Incorrect Comparison. CVSS score: 5.3/10. Published 2021-03-26.
How severe is CVE-2020-25580?: Medium severity. CVSS v3 base score is 5.3 out of 10.