Vulnerability · Published Oct 26, 2021 · Assigned by CERTVDE
CVE-2021-34595CODESYS V2 runtime: out-of-bounds read or write access may result in denial-of-service
High 8.1
In plain English
A high-severity security flaw in CODESYS V2 from CODESYS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 59% of all known vulnerabilities).
Severity (CVSS 3.1)8.1High
Exploit odds (30 days)0.9%top 41.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
A crafted request with invalid offsets may cause an out-of-bounds read or write access in CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56, resulting in a denial-of-service condition or local memory overwrite.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| CODESYS | CODESYS V2 | Runtime Toolkit 32 bit full – before V2.4.7.56PLCWinNT – before V2.4.7.56 |
Weakness: CWE-823 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H