What is CVE-2019-12549?

CVE-2019-12549 is a critical-severity vulnerability in Wago 852-1305, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2019-06-17.

How severe is CVE-2019-12549?

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

Vulnerability in Wago 852-1305

CVE-2019-12549

WAGO 852-303 before FW06, 852-1305 before FW06, and 852-1505 before FW03 devices contain hardcoded private keys for the SSH daemon. The fingerprint of the SSH host key from the corresponding SSH daemon matches the embedded private key.

Published 2019-06-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.033 (87.9th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.033 · newest: 0.033 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

References

www.wago.com/us/ (Vendor Advisory)
ics-cert.us-cert.gov/advisories/ICSA-19-164-02 (US Government Resource, Third Party Advisory)
cert.vde.com/en-us/advisories/vde-2019-013 (Third Party Advisory)

Frequently asked questions

What is CVE-2019-12549?: CVE-2019-12549 is a critical-severity vulnerability in Wago 852-1305, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2019-06-17.
How severe is CVE-2019-12549?: Critical severity. CVSS v3 base score is 9.8 out of 10.