Cyber Resilience

CVE-2021-30194

Critical

Published: 25 May 2021

Published
25 May 2021
Modified
15 August 2025
KEV Added
—
Patch
—
CVSS Score v3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
EPSS Score 0.0053 67.6th percentile
Risk Priority 19 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-30194 is a critical-severity Out-of-bounds Read (CWE-125) vulnerability in Wago 750-893 Firmware. Its CVSS base score is 9.1 (Critical).

Operationally, ranked in the top 32.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

CODESYS V2 Web-Server before 1.1.9.20 has an Out-of-bounds Read.

CWE(s)
CWE-125

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

wago
750-893 firmware
≤ fw08
wago
750-891 firmware
≤ fw08
wago
750-890 firmware
≤ fw08
wago
750-889 firmware
≤ fw15
wago
750-885 firmware
≤ fw15
wago
750-882 firmware
≤ fw15
wago
750-881 firmware
≤ fw15
wago
750-880 firmware
≤ fw16
wago
750-862 firmware
≤ fw08
wago
750-852 firmware
≤ fw15
+18 more product configuration(s) — see NVD for full list

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References