What is CVE-2020-25709?

CVE-2020-25709 is a high-severity vulnerability in Apple macOS, classified under Reachable Assertion. CVSS score: 7.5/10. Published 2021-05-18.

How severe is CVE-2020-25709?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2020-25709 known to be exploited?

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

Vulnerability in Apple macOS

CVE-2020-25709

A flaw was found in OpenLDAP. This flaw allows an attacker who can send a malicious packet to be processed by OpenLDAP’s slapd server, to trigger an assertion failure. The highest threat from this vulnerability is to system availability.

Published 2021-05-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.029 (86.2th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.029 · newest: 0.029 · change: 0.000

Affected products

Apple macOS
Apple Mac OS X — versions 10.14.6, 10.15.7
Openldap
Debian Linux — versions 9.0, 10.0
Red Hat Jboss Core Services
Openldap — versions openldap 2.4.56

Weakness classification (CWE)

CWE-617 — Reachable Assertion

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

www.debian.org/security/2020/dsa-4792 (vendor-advisory, Third Party Advisory)
lists.debian.org/debian-lts-announce/2020/12/msg00008.html (mailing-list, Mailing List, Third Party Advisory)
support.apple.com/kb/HT212147 (Third Party Advisory)
seclists.org/fulldisclosure/2021/Feb/14 (mailing-list, Mailing List, Third Party Advisory)
bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a4508… (mailing-list)
lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698… (mailing-list)
security.netapp.com/advisory/ntap-20210716-0003/ (Third Party Advisory)

Frequently asked questions

What is CVE-2020-25709?: CVE-2020-25709 is a high-severity vulnerability in Apple macOS, classified under Reachable Assertion. CVSS score: 7.5/10. Published 2021-05-18.
How severe is CVE-2020-25709?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2020-25709 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.