CVE-2026-4769

criticalpriority · track · 0EPSS 0.008 · 55 %ileDEEU
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.76% (55th) EPSS
CVSS 9.8 · critical
Is it mine?
24 products
Check your exposure
Who says so?
3 sources
cnnvd · enisa_euvd · wago_psirt

EPSS · scored 2026-10-22

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.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • Fixedwago_psirt

    Update to the listed fixed versions of the affected firmwares: | Fixed Version | Product Name | | ------------- | ------------------------------------ | | 1.2.1.100 | I/O System Field 0765-110x/0100-0000 | | 1.2.7.100 | I/O System Field 0765-120x/0100-0000 | | 1.2.7.103 | I/O System Field 0765-150x/0100-0000 | | 1.2.1.102 | I/O System Field 0765-2101/0100-0000 | | 1.2.5.101 | I/O System Field 0765-2102/0100-0000 | | 1.2.1.100 | I/O System Field 0765-410x/0100-0000 | | 1.2.7.100 | I/O System Field 0765-420x/0100-0000 | | 1.2.7.103 | I/O System Field 0765-450x/0100-0000 |

02

cvss

Technical severity, 0–10. One row per scoring source.

9.8
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 8.1–9.8

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · info@cert.vde.comexploitability 3.9 · impact 5.9
v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · WAGO PSIRT DE
v4.09.3criticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:Nsecondary · ENISA EU
v4.09.3criticalCVSS: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:Xsecondary · info@cert.vde.com
v4.08.1highCVSS: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:U/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:Xsecondary · CVSS-BT (t0sche)
03

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-912USCWE-912US
05

affected products (24)

Products and version ranges known to be affected.

showing 20 of 24
06

advisories (1)

Vendor and ecosystem advisories describing this.

  • VDE-2026-031WAGO: Early-Boot Diagnostic Exposure in WAGO System I/O Field Devices2026-07-13csaf · wago_psirtDE

    Certain devices in the WAGO System I/O Field series enable an internal diagnostic capability during the initial stages of system startup. This behavior, which is not part of the publicly documented feature set, briefly allows access to system functions before the main operating environment becomes fully active. Under specific conditions, this could permit interactions with system components that are normally protected during regular operation.

07

also known as (3)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdwago_psirtNVDCVE.orgMITRE
published 2026-07-13modified 2026-07-13
09

references (3)

External citations — patches, advisories, analysis.

scry

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