What is CVE-2025-22940?

CVE-2025-22940 is a critical-severity vulnerability in Adtran 411, classified under Improper Access Control. CVSS score: 9.1/10. Published 2025-03-31.

How severe is CVE-2025-22940?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Is CVE-2025-22940 known to be exploited?

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

Vulnerability in Adtran 411

CVE-2025-22940

Incorrect access control in Adtran 411 ONT L80.00.0011.M2 allows unauthorized attackers to arbitrarily set the admin password.

Published 2025-03-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.005 (40.6th percentile), scored 2026-10-31.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.6% 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

Adtran 411
Adtran 411 Firmware — versions l80.00.0011.m2

Weakness classification (CWE)

CWE-284 — Improper Access Control

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

drive.google.com/file/d/1levaZk5aC6g6a2zPW8xlOIVAu9MFYvAz/view (Exploit, Third Party Advisory)
lanrat.com/posts/adtran-isp-hacking/

Frequently asked questions

What is CVE-2025-22940?: CVE-2025-22940 is a critical-severity vulnerability in Adtran 411, classified under Improper Access Control. CVSS score: 9.1/10. Published 2025-03-31.
How severe is CVE-2025-22940?: Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2025-22940 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.