CVE-2021-34595
8.1 · HIGHOverview
CVE-2021-34595 is a high-severity vulnerability affecting wago 750-823_firmware. It was published on October 26, 2021 and has a CVSS 3.1 base score of 8.1 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from wago. Update 750-823_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| wago | 750-823_firmware | >= 0, < fw10 | Affected |
| wago | 750-829_firmware | >= 0, < fw17 | Affected |
| wago | 750-831_firmware | >= 0, < fw17 | Affected |
| wago | 750-832_firmware | >= 0, < fw10 | Affected |
| wago | 750-852_firmware | >= 0, < fw17 | Affected |
| wago | 750-862_firmware | >= 0, < fw10 | Affected |
| wago | 750-880_firmware | >= 0, < fw17 | Affected |
| wago | 750-881_firmware | >= 0, < fw17 | Affected |
| wago | 750-882_firmware | >= 0, < fw17 | Affected |
| wago | 750-885_firmware | >= 0, < fw17 | Affected |
Frequently Asked Questions
What is CVE-2021-34595?
CVE-2021-34595 is a high-severity vulnerability affecting wago 750-823_firmware. It was published on October 26, 2021 and has a CVSS 3.1 base score of 8.1 (HIGH).
How severe is CVE-2021-34595?
This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-34595?
Check the references section for vendor advisories and patches from wago. Update 750-823_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-34595?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-34595 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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