CVE-2026-4769
Unauthenticated Access to Internal Diagnostic Interface
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.
INFO
Published Date :
July 13, 2026, 8:16 a.m.
Last Modified :
July 13, 2026, 8:16 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-4769
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | 270ccfa6-a436-4e77-922e-914ec3a9685c | ||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | CRITICAL | 270ccfa6-a436-4e77-922e-914ec3a9685c | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Disable undocumented diagnostic features.
- Implement strict authentication controls.
- Apply vendor security patches promptly.
- Monitor system startup for anomalies.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-4769.
| URL | Resource |
|---|---|
| https://www.certvde.com/en/advisories/VDE-2026-031/ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-4769 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-4769
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-4769 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-4769 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Jul. 13, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'WAGO', 'product': '0765-110x/0100-0000', 'versions': [{'status': 'affected', 'version': '1.0.0.0', 'lessThan': '1.2.1.100', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'WAGO', 'product': '0765-120x/0100-0000', 'versions': [{'status': 'affected', 'version': '1.0.0.0', 'lessThan': '1.2.7.100', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'WAGO', 'product': '0765-150x/0100-0000', 'versions': [{'status': 'affected', 'version': '1.0.0.0', 'lessThan': '1.2.7.103', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'WAGO', 'product': '0765-2101/0100-0000', 'versions': [{'status': 'affected', 'version': '1.0.0.0', 'lessThan': '1.2.1.102', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'WAGO', 'product': '0765-2102/0100-0000', 'versions': [{'status': 'affected', 'version': '1.0.0.0', 'lessThan': '1.2.5.101', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'WAGO', 'product': '0765-410x/0100-0000', 'versions': [{'status': 'affected', 'version': '1.0.0.0', 'lessThan': '1.2.1.100', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'WAGO', 'product': '0765-420x/0100-0000', 'versions': [{'status': 'affected', 'version': '1.0.0.0', 'lessThan': '1.2.7.100', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}, {'vendor': 'WAGO', 'product': '0765-450x/0100-0000', 'versions': [{'status': 'affected', 'version': '1.0.0.0', 'lessThan': '1.2.7.103', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V4.0 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 Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-912 Added Reference https://www.certvde.com/en/advisories/VDE-2026-031/