What is CVE-2021-30189?

CVE-2021-30189 is a critical-severity vulnerability in Codesys V2_web_server, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2021-05-25.

How severe is CVE-2021-30189?

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

Buffer overflow in Codesys V2_web_server

CVE-2021-30189

CODESYS V2 Web-Server before 1.1.9.20 has a Stack-based Buffer Overflow.

Vulnerability class: Buffer Overflow

EPSS: 0.013 (66.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Codesys V2_web_server
Wago 750-8202
Wago 750-8202_firmware
Wago 750-8203
Wago 750-8203_firmware
Wago 750-8204
Wago 750-8204_firmware
Wago 750-8206
Wago 750-8206_firmware
Wago 750-8207

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

cve@mitre.org (Permissions Required, x_refsource_MISC, Vendor Advisory)
cve@mitre.org (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-30189?: CVE-2021-30189 is a critical-severity vulnerability in Codesys V2_web_server, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2021-05-25.
How severe is CVE-2021-30189?: Critical severity. CVSS v3 base score is 9.8 out of 10.