Codesys V2 vulnerabilities
7 vulnerabilities
Known vulnerabilities in Codesys V2, newest first, with CVSS severity, EPSS, KEV listings, ransomware use and the affected versions.
CVE-2021-34596codesyscodesys+30
EPSS score0.83%
A crafted request may cause a read access to an uninitialized pointer in CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56, resulting in a denial-of-service condition.CVE-2021-34583codesyscodesys+28EPSS score8.84%
Crafted web server requests may cause a heap-based buffer overflow and could therefore trigger a denial-of- service condition due to a crash in the CODESYS V2 web server prior to V1.1.9.22.CVE-2021-34595codesyscodesys+30EPSS score0.85%
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.CVE-2021-34584codesyscodesys+28EPSS score1.08%
Crafted web server requests can be utilised to read partial stack or heap memory or may trigger a denial-of- service condition due to a crash in the CODESYS V2 web server prior to V1.1.9.22.CVE-2021-34593codesyscodesys v2+15EPSS score2.66%
In CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56 unauthenticated crafted invalid requests may result in several denial-of-service conditions. Running PLC programs may be stopped, memory may be leaked, or further communication clients may be blocked from accessing the PLC.CVE-2021-34586codesyscodesys+28EPSS score13.74%
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.CVE-2021-34585codesyscodesys+28EPSS score0.90%
In the CODESYS V2 web server prior to V1.1.9.22 crafted web server requests can trigger a parser error. Since the parser result is not checked under all conditions, a pointer dereference with an invalid address can occur. This leads to a denial of service situation.