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Vulnerability record · CVE-2021-34568 · published 9 November 2022

CVE-2021-34568: Wago 750-8100 firmware allocation without limits vulnerability

Wago · 750 8100 Firmware

In WAGO I/O-Check Service in multiple products an unauthenticated remote attacker can send a specially crafted packet containing OS commands to provoke a denial of service.

7.5 CVSS 3.1 High EPSS 1.1% · top 35.9% CWE-770 · Allocation without limits
7.5CVSS 3.1 base score
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
49Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

In WAGO I/O-Check Service in multiple products an unauthenticated remote attacker can send a specially crafted packet containing OS commands to provoke a denial of service.

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

Affected products

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

References

LinkTags
https://cert.vde.com/en/advisories/VDE-2020-036/ Vendor Advisory
https://cert.vde.com/en/advisories/VDE-2020-036/ Vendor 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 0.86%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 1.1%8.2CVE-2021-34567Wago 750-8100 firmware out-of-bounds read vulnerabilityIn WAGO I/O-Check Service in multiple products an unauthenticated remote attacker can send a specially crafted packet containing OS commands to provo…EPSS 0.82%7.8CVE-2020-12069Pilz pmc vulnerabilityIn CODESYS V3 products in all versions prior V3.5.16.0 containing the CmpUserMgr, the CODESYS Control runtime system stores the online communication …EPSS 0.16%7.5CVE-2022-3281Wago 750-8100 firmware vulnerabilityWAGO Series PFC100/PFC200, Series Touch Panel 600, Compact Controller CC100 and Edge Controller in multiple versions are prone to a loss of MAC-Addre…EPSS 0.73%5.4CVE-2022-22511Wago 750-8100 firmware cross-site scripting vulnerabilityVarious configuration pages of the device are vulnerable to reflected XSS (Cross-Site Scripting) attacks. An authorized attacker with user privileges…EPSS 0.56%8.6CVE-2020-3569Cisco IOS XR DVMRP IGMP packet handling memory exhaustionCisco IOS XR Software mishandles IGMP packets in its Distance Vector Multicast Routing Protocol (DVMRP) feature, allowing crafted traffic to crash th…KEVEPSS 3.3%analysed8.6CVE-2020-3566Cisco IOS XR DVMRP IGMP queue flaw causes memory exhaustionCisco IOS XR Software mishandles queue management for IGMP packets in its DVMRP feature, allowing uncontrolled memory consumption. An unauthenticated…KEVEPSS 3.7%analysed

Source: NIST National Vulnerability Database (record CVE-2021-34568), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.