Out-of-bounds Read in Wago 750-8100
CVE-2021-34567
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 and an limited out-of-bounds read.
Vulnerability class: Buffer Overflow
EPSS: 0.008 (51.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H.
Affected products
- Wago 750-8100
- Wago 750-8100_firmware — versions 18
- Wago 750-8101
- Wago 750-8101\/025-000
- Wago 750-8101\/025-000_firmware — versions 18
- Wago 750-8101_firmware — versions 18
- Wago 750-8102
- Wago 750-8102\/025-000
- Wago 750-8102\/025-000_firmware — versions 18
- Wago 750-8102_firmware — versions 18
Weakness classification (CWE)
Public proof-of-concept exploits
References
- info@cert.vde.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-34567?
- CVE-2021-34567 is a high-severity vulnerability in Wago 750-8100, classified under Out-of-bounds Read. CVSS score: 8.2/10. Published 2022-11-09.
- How severe is CVE-2021-34567?
- High severity. CVSS v3 base score is 8.2 out of 10.
- Is CVE-2021-34567 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.