What is CVE-2021-33485?

CVE-2021-33485 is a critical-severity vulnerability in Codesys Control, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2021-08-03.

How severe is CVE-2021-33485?

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

Buffer overflow in Codesys Control

CVE-2021-33485

CODESYS Control Runtime system before 3.5.17.10 has a Heap-based Buffer Overflow.

Vulnerability class: Buffer Overflow

EPSS: 0.004 (60.7th 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 Control
Codesys Control_rte
Codesys Control_runtime_system_toolkit
Codesys Control_win_sl
Codesys Embedded_target_visu_toolkit
Codesys Hmi
Codesys Remote_target_visu_toolkit
N/a — versions n/a

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write
CWE-122 — Heap-based Buffer Overflow

References

cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2021-33485?: CVE-2021-33485 is a critical-severity vulnerability in Codesys Control, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2021-08-03.
How severe is CVE-2021-33485?: Critical severity. CVSS v3 base score is 9.8 out of 10.