What’s Vulnerable › Vulnerabilities

CVE-2019-12550

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.7% 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 users and passwords that can be used to login via SSH and TELNET.

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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