CVE-2021-34584: critical vulnerability in CODESYS V2
CODESYS V2 web server: crafted requests could trigger a buffer over-read (DoS)
Published · Updated
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.1epss 1.1%
exploitation probability
1.1%top 35% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Affected products
CODESYS · CODESYS V2Related CVEs — CODESYS V2
In the same product, most dangerous first.
CVE-2021-34586HIGHCODESYS V2 web server: crafted requests could trigger a null pointer dereference (DoS)EPSS 14.1%CVE-2021-34583HIGHCODESYS V2 web server: crafted requests could trigger a heap-based buffer overflow (DoS)EPSS 8.4%CVE-2021-34593HIGHCODESYS V2 runtime: unauthenticated invalid requests may result in denial-of-serviceEPSS 2.7%CVE-2021-34585HIGHCODESYS V2 web server: crafted requests could trigger a pointer dereference with an invalid address (DoS)EPSS 0.9%CVE-2021-34595HIGHCODESYS V2 runtime: out-of-bounds read or write access may result in denial-of-serviceEPSS 0.9%CVE-2021-34596MEDIUMCODESYS V2 runtime: Access of Uninitialized Pointer may result in denial-of-serviceEPSS 0.9%