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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.008 (55.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: +0.000
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
- cert.vde.com/en/advisories/VDE-2020-036/ (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.