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CVE-2026-4769

CRITICALCVSS 9.8/10EPSS 0.45%

Last modified

CVE-2026-4769 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Certain devices in the WAGO System I/O Field series activate an internal diagnostic capability during the initial startup sequence. This functionality is not formally documented and becomes accessible without authentication for a brief period in the early boot phase. EPSS estimates a 0.45% chance of exploitation in the next 30 days.

Description

Certain devices in the WAGO System I/O Field series activate an internal diagnostic capability during the initial startup sequence. This functionality is not formally documented and becomes accessible without authentication for a brief period in the early boot phase. During this window, an unauthenticated remote attacker can gain access to the internal system processes, resulting in full system compromise.

Metrics

CVSS 3.1
9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0
9.3/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability
0.45%

36.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
WAGO0765-110x/0100-0000>= 1.0.0.0, < 1.2.1.100
WAGO0765-120x/0100-0000>= 1.0.0.0, < 1.2.7.100
WAGO0765-150x/0100-0000>= 1.0.0.0, < 1.2.7.103
WAGO0765-2101/0100-0000>= 1.0.0.0, < 1.2.1.102
WAGO0765-2102/0100-0000>= 1.0.0.0, < 1.2.5.101
WAGO0765-410x/0100-0000>= 1.0.0.0, < 1.2.1.100
WAGO0765-420x/0100-0000>= 1.0.0.0, < 1.2.7.100
WAGO0765-450x/0100-0000>= 1.0.0.0, < 1.2.7.103

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-4769?
Certain devices in the WAGO System I/O Field series activate an internal diagnostic capability during the initial startup sequence. This functionality is not formally documented and becomes accessible without authentication for a brief period in the early boot phase. During this window, an unauthenticated remote attacker can gain access to the internal system processes, resulting in full system compromise.
How severe is CVE-2026-4769?
CVE-2026-4769 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.45% probability of exploitation in the next 30 days.
How do I fix CVE-2026-4769?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST