CVE-2021-34593

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-755

Affected software

No affected versions have been published.

Timeline

Published: Oct 26, 2021
Last modified: Jun 17, 2026
NVD status: Analyzed

Related CVEs from 2021

CVE-2021-345946.5TwinCAT OPC UA Server in TF6100 and TS6100 in product versions before 4.3.48.0 or with TcOpcUaServer versions below 3.2.0.194 are prone to a CVE-2021-345958.1A crafted request with invalid offsets may cause an out-of-bounds read or write access in CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinN CVE-2021-345966.5A crafted request may cause a read access to an uninitialized pointer in CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versio CVE-2021-345977.8Improper Input Validation vulnerability in PC Worx Automation Suite of Phoenix Contact up to version 1.88 could allow an attacker with a man CVE-2021-345987.5In Phoenix Contact FL MGUARD 1102 and 1105 in Versions 1.4.0, 1.4.1 and 1.5.0 the remote logging functionality is impaired by the lack of me CVE-2021-345997.4Affected versions of CODESYS Git in Versions prior to V1.1.0.0 lack certificate validation in HTTPS handshakes. CODESYS Git does not impleme CVE-2021-34609.8The Motorola MH702x devices, prior to version 2.0.0.301, do not properly verify the server certificate during communication with the support CVE-2021-346005.5Telenot CompasX versions prior to 32.0 use a weak seed for random number generation leading to predictable AES keys used in the NFC tags use CVE-2021-346019.8In Bender/ebee Charge Controllers in multiple versions are prone to Hardcoded Credentials. Bender charge controller CC612 in version 5.20.1 CVE-2021-346028.8In Bender/ebee Charge Controllers in multiple versions are prone to Command injection via Web interface. An authenticated attacker could ent CVE-2021-346057.3A zip slip vulnerability in XINJE XD/E Series PLC Program Tool up to version v3.5.1 can provide an attacker with arbitrary file write privil CVE-2021-346067.3A vulnerability exists in XINJE XD/E Series PLC Program Tool in versions up to v3.5.1 that can allow an authenticated, local attacker to loa