Home/CVE/CODESYS V2 runtime system SP before 2.4.7.55 has a Stack-based Buffer Overflow.
CVE

CVE-2021-30188

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

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

CRITICAL · CVSS 9.8 EPSS 0.0057
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-787Out-of-bounds Write
▤

Affected Products & Versions

28
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
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD25 May 2021 · 01:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

2
cisa-csafcisa-csaf-csaf_files-OT-white-2021-icsa-21-173-03
cisa-csafcisa-csaf-csaf_files-OT-white-2026-icsa-26-076-01
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://customers.codesys.com/index.phpPermissions RequiredVendor Advisory
https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=14725&token=08691519ef764b252630759eff925890176ecd78&download=Vendor Advisory
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