Vulnerability · Published Nov 9, 2022 · Assigned by CERTVDE
CVE-2021-34566WAGO I/O-Check Service prone to Memory Overflow
Critical 9.1
In plain English
A critical-severity buffer overflow in 750-81xx/xxx-xxxFW from WAGO. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 72% of all known vulnerabilities).
Severity (CVSS 3.1)9.1Critical
Exploit odds (30 days)1.4%top 28.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
In WAGO I/O-Check Service in multiple products an unauthenticated remote attacker can send a specially crafted packet containing OS commands to crash the iocheck process and write memory resulting in loss of integrity and DoS.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| WAGO | 750-81xx/xxx-xxxFW | FW1 – through FW18 Patch 2 |
| WAGO | 750-82xx/xxx-xxx | FW1 – through FW18 Patch 2 |
| WAGO | 752-8303/8000-0002 | FW1 – through FW18 Patch 2 |
| WAGO | 762-4xxx | FW1 – through FW18 Patch 2 |
| WAGO | 762-5xxx | FW1 – through FW18 Patch 2 |
| WAGO | 762-6xxx | FW1 – through FW18 Patch 2 |
Weakness: CWE-120 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H