CVE-2021-34593
HIGHWago 750-8202 Firmware < fw20 - Improper Exception Handling
Title source: ruleDescription
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.
References (4)
Core 4
Core References
Vendor Advisory x_refsource_confirm
https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16877&token=8faab0fc1e069f4edfca5d5aba8146139f67a175&download=
Mailing List, Third Party Advisory mailing-list
x_refsource_fulldisc
http://seclists.org/fulldisclosure/2021/Oct/64
Exploit, Third Party Advisory, VDB Entry x_refsource_misc
http://packetstormsecurity.com/files/164716/CODESYS-2.4.7.0-Denial-Of-Service.html
Exploit, Third Party Advisory, VDB Entry x_refsource_misc
http://packetstormsecurity.com/files/165874/WAGO-750-8xxx-PLC-Denial-Of-Service-User-Enumeration.html
Scores
CVSS v3
7.5
EPSS
0.0265
EPSS Percentile
83.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-755
Status
published
Products (15)
codesys/plcwinnt
< 2.4.7.56
codesys/runtime_toolkit
< 2.4.7.56
wago/750-8202_firmware
< fw20
wago/750-8203_firmware
< fw20
wago/750-8204_firmware
< fw20
wago/750-8206_firmware
< fw20
wago/750-8207_firmware
< fw20
wago/750-8208_firmware
< fw20
wago/750-8210_firmware
< fw20
wago/750-8211_firmware
< fw20
... and 5 more
Published
Oct 26, 2021
Tracked Since
Feb 18, 2026