What’s Vulnerable › Vulnerabilities

CVE-2019-12549

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-06-17 · updated 2026-06-17
• Weakness: CWE-798

Description

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.

Affected products

• WAGO 852-1305 Firmware: before 1.1.6.s0 — fixed in 1.1.6.s0
• WAGO 852-1505 Firmware: before 1.1.5.s0 — fixed in 1.1.5.s0
• WAGO 852-303 Firmware: before 1.2.2.s0 — fixed in 1.2.2.s0

How to fix

Upgrade to a fixed version: WAGO 852-1305 Firmware 1.1.6.s0; WAGO 852-1505 Firmware 1.1.5.s0; WAGO 852-303 Firmware 1.2.2.s0. Check the vendor advisory for mitigations.

References

• https://cert.vde.com/en-us/advisories/vde-2019-013
• https://ics-cert.us-cert.gov/advisories/ICSA-19-164-02
• https://www.wago.com/us/
• https://cert.vde.com/en-us/advisories/vde-2019-013
• https://ics-cert.us-cert.gov/advisories/ICSA-19-164-02
• https://www.wago.com/us/

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