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Fencer Vulns
critical 9.8

CVE-2019-12550 json

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…

published 2019-06-17 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-4145

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.7%
EPSS 2.7% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

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.

Patch / fix

  • wago 852-303_firmware 1.2.2.s0
  • wago 852-1305_firmware 1.1.6.s0
  • wago 852-1505_firmware 1.1.5.s0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-19-164-02 updated cvss 9.8

WAGO Industrial Managed Switches 852-303, 852-1305, and 852-1505

  • WAGO Industrial Managed Switch 852-303 < 1.2.2.S0 WAGO Industrial Managed Switch 852-1305 < 1.1.6.S0 WAGO Industrial Managed Switch 852-1505 < 1.1.5.S0
    affected: mitigation “852-303: v1.2.2.S0 or later” wago.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

2.66% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-798 Use of Hard-coded Credentials

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.