Buffer overflow in Codesys Plcwinnt

CVE-2021-30186

CODESYS V2 runtime system SP before 2.4.7.55 has a Heap-based Buffer Overflow.

Vulnerability class: Buffer Overflow

EPSS: 0.074 (93.6th 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

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

yossireuven/Publications

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-2021-30186?: CVE-2021-30186 is a high-severity vulnerability in Codesys Plcwinnt, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2021-05-25.
How severe is CVE-2021-30186?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2021-30186 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.