Login Request a demo
High severity · published Oct 26, 2021
CVE-2021-34595
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,…
8.1
CVSS
0.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 58% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
7F
750-8202 Firmware · Wago
before fw20 · source: NVD
7F
750-8203 Firmware · Wago
before fw20 · source: NVD
7F
750-8204 Firmware · Wago
before fw20 · source: NVD
7F
750-8206 Firmware · Wago
before fw20 · source: NVD
7F
750-8207 Firmware · Wago
before fw20 · source: NVD
7F
750-8208 Firmware · Wago
before fw20 · source: NVD
7F
750-8210 Firmware · Wago
before fw20 · source: NVD
7F
750-8211 Firmware · Wago
before fw20 · source: NVD
7F
750-8212 Firmware · Wago
before fw20 · source: NVD
7F
750-8213 Firmware · Wago
before fw20 · source: NVD
7F
750-8214 Firmware · Wago
before fw20 · source: NVD
7F
750-8216 Firmware · Wago
before fw20 · source: NVD
Affected product
CO
Codesys
Codesys
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-34595
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-34595
Vendor Advisory
https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16878&token=e5644ec405590e66aefa62304cb8632df9fc9e9c&download=
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