Vulnerability · Published Oct 26, 2021 · Assigned by CERTVDE
CVE-2021-34586CODESYS V2 web server: crafted requests could trigger a null pointer dereference (DoS)
High 7.5
In plain English
A high-severity null pointer dereference 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 13.7% (higher than 97% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)13.7%top 3.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
In the CODESYS V2 web server prior to V1.1.9.22 crafted web server requests may cause a Null pointer dereference in the CODESYS web server and may result in a denial-of-service condition.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| CODESYS | CODESYS V2 | all web servers – before V1.1.9.22 |
Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H