CVE-2021-34567: wago 750-8100_firmware Out-of-bounds Read
CVSS: 8.2v3.1HighModified
Published 09-11-2022Last modified 01-05-2025
Vulnerability summary
CVE-2021-34567 is a high (CVSS 8.2) Out-of-bounds Read vulnerability in wago 750-8100_firmware. EPSS estimates a 0.86% chance of exploitation in the next 30 days, higher than 57.7% of scored vulnerabilities.
CVSS score
8.2/10
010
High · v3.1 (CVE.org)EPSS score
0.86%
0%100%
Low · +0.03 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 09-11-2022PublishedVulnerability first disclosed.
- 01-05-2025Last modifiedVulnerability information updated.
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 and an limited out-of-bounds read.
CVSS metrics
2 scores · 2 sources · 1 versionHigh 8.2Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:HSourcesAll 2 agree
- NVDNIST8.2HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
EPSS trend
Probability
0.86%
Chance of exploitation in the next 30 days
Percentile
58%
Versus all other CVEs
30-day change
+0.03 pp
From 0.82% on 20-09-2026
20-09-202620-10-2026
EPSS score0.86%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Wago55 products
- 750-8100_firmware< 18 | 18 | 18:patch_1 | 18:patch_2
- 750-8101_firmware< 18 | 18 | 18:patch_1 | 18:patch_2
- 750-8101\/025-000_firmware< 18 | 18 | 18:patch_1 | 18:patch_2
- 750-8102_firmware< 18 | 18 | 18:patch_1 | 18:patch_2
- 750-8102\/025-000_firmware< 18 | 18 | 18:patch_1 | 18:patch_2
1 vendor · 55 products
References
1 links- cert.vde.com/en/advisories/VDE-2020-036/Vendor Advisory