What is CVE-2021-30191?

CVE-2021-30191 is a high-severity vulnerability in Codesys V2_web_server, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2021-05-25.

How severe is CVE-2021-30191?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Codesys V2_web_server

CVE-2021-30191

CODESYS V2 Web-Server before 1.1.9.20 has a a Buffer Copy without Checking the Size of the Input.

Vulnerability class: Buffer Overflow

EPSS: 0.010 (59.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

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-2021-30191?: CVE-2021-30191 is a high-severity vulnerability in Codesys V2_web_server, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2021-05-25.
How severe is CVE-2021-30191?: High severity. CVSS v3 base score is 7.5 out of 10.