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Vulnerability record · CVE-2023-1620 · published 26 June 2023

CVE-2023-1620: Wago 750-331 firmware vulnerability

Wago · 750 331 Firmware

Multiple WAGO devices in multiple versions may allow an authenticated remote attacker with high privileges to DoS the device by sending a specifically crafted packet to the CODESYS V2 runtime.

4.9 CVSS 3.1 Medium EPSS 0.85% · top 42.6% CWE-1288 · CWE-1288
4.9CVSS 3.1 base score
0.85%EPSS exploitation probability, 30 days
NoNot in CISA KEV
76Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Multiple WAGO devices in multiple versions may allow an authenticated remote attacker with high privileges to DoS the device by sending a specifically crafted packet to the CODESYS V2 runtime.

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

Affected products

76 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://cert.vde.com/en/advisories/VDE-2023-006/ MitigationThird Party Advisory
https://cert.vde.com/en/advisories/VDE-2023-006/ MitigationThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-34569Wago 750-8100 firmware out-of-bounds write vulnerabilityIn WAGO I/O-Check Service in multiple products an attacker can send a specially crafted packet containing OS commands to crash the diagnostic tool an…EPSS 0.87%9.8CVE-2021-30192Wago 750-893 firmware vulnerabilityCODESYS V2 Web-Server before 1.1.9.20 has an Improperly Implemented Security Check.EPSS 1.2%9.8CVE-2021-30190Wago 750-893 firmware missing authentication for critical function vulnerabilityCODESYS V2 Web-Server before 1.1.9.20 has Improper Access Control.EPSS 1.4%9.8CVE-2021-30188Wago 750-893 firmware out-of-bounds write vulnerabilityCODESYS V2 runtime system SP before 2.4.7.55 has a Stack-based Buffer Overflow.EPSS 1.3%9.8CVE-2021-30193Wago 750-893 firmware out-of-bounds write vulnerabilityCODESYS V2 Web-Server before 1.1.9.20 has an Out-of-bounds Write.EPSS 1.2%9.8CVE-2021-30189Wago 750-893 firmware out-of-bounds write vulnerabilityCODESYS V2 Web-Server before 1.1.9.20 has a Stack-based Buffer Overflow.EPSS 1.3%9.1CVE-2021-34566Wago 750-8100 firmware classic buffer overflow vulnerabilityIn WAGO I/O-Check Service in multiple products an unauthenticated remote attacker can send a specially crafted packet containing OS commands to crash…EPSS 1.2%9.1CVE-2021-34584Wago 750-823 firmware vulnerabilityCrafted 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 …EPSS 1.1%

Source: NIST National Vulnerability Database (record CVE-2023-1620), CISA KEV, FIRST EPSS (scores of 2026-10-16). This page is refreshed as NVD updates the record.