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TI-2026-04160 Aliases CVE-2026-4769GHSA-2r6r-vgg5-p59v

Unauthenticated Access to Internal Diagnostic Interface

Priority MEDIUM 49CWE-912Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00757 55th percentileScored 2026-11-07
Fix Fixed 0765-110x/0100-0000 (WAGO): 1.2.1.1000765-120x/0100-0000 (WAGO): 1.2.7.100+6 more products

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
WAGO0765-110x/0100-00001.0.0.0 to before 1.2.1.1001.2.1.100Patch availableCNA
WAGO0765-120x/0100-00001.0.0.0 to before 1.2.7.1001.2.7.100Patch availableCNA
WAGO0765-150x/0100-00001.0.0.0 to before 1.2.7.1031.2.7.103Patch availableCNA
WAGO0765-2101/0100-00001.0.0.0 to before 1.2.1.1021.2.1.102Patch availableCNA
WAGO0765-2102/0100-00001.0.0.0 to before 1.2.5.1011.2.5.101Patch availableCNA
WAGO0765-410x/0100-00001.0.0.0 to before 1.2.1.1001.2.1.100Patch availableCNA
WAGO0765-420x/0100-00001.0.0.0 to before 1.2.7.1001.2.7.100Patch availableCNA
WAGO0765-450x/0100-00001.0.0.0 to before 1.2.7.1031.2.7.103Patch availableCNA
  • 0765-110x/0100-0000 VendorWAGO Affected 1.0.0.0 to before 1.2.1.100 Fixed in 1.2.1.100 Patch available CNA
  • 0765-120x/0100-0000 VendorWAGO Affected 1.0.0.0 to before 1.2.7.100 Fixed in 1.2.7.100 Patch available CNA
  • 0765-150x/0100-0000 VendorWAGO Affected 1.0.0.0 to before 1.2.7.103 Fixed in 1.2.7.103 Patch available CNA
  • 0765-2101/0100-0000 VendorWAGO Affected 1.0.0.0 to before 1.2.1.102 Fixed in 1.2.1.102 Patch available CNA
  • 0765-2102/0100-0000 VendorWAGO Affected 1.0.0.0 to before 1.2.5.101 Fixed in 1.2.5.101 Patch available CNA
  • 0765-410x/0100-0000 VendorWAGO Affected 1.0.0.0 to before 1.2.1.100 Fixed in 1.2.1.100 Patch available CNA
  • 0765-420x/0100-0000 VendorWAGO Affected 1.0.0.0 to before 1.2.7.100 Fixed in 1.2.7.100 Patch available CNA
  • 0765-450x/0100-0000 VendorWAGO Affected 1.0.0.0 to before 1.2.7.103 Fixed in 1.2.7.103 Patch available CNA

Remediation

  • Fix · CNA 0765-110x/0100-0000 (WAGO) Fixed in 1.2.1.100
  • Fix · CNA 0765-120x/0100-0000 (WAGO) Fixed in 1.2.7.100
  • Fix · CNA 0765-150x/0100-0000 (WAGO) Fixed in 1.2.7.103
  • Fix · CNA 0765-2101/0100-0000 (WAGO) Fixed in 1.2.1.102
  • Fix · CNA 0765-2102/0100-0000 (WAGO) Fixed in 1.2.5.101
  • Fix · CNA 0765-410x/0100-0000 (WAGO) Fixed in 1.2.1.100
  • Fix · CNA 0765-420x/0100-0000 (WAGO) Fixed in 1.2.7.100
  • Fix · CNA 0765-450x/0100-0000 (WAGO) Fixed in 1.2.7.103

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-4769
  2. 2026-10-03 Alias added: GHSA-2r6r-vgg5-p59v

References

Other 1

  • TI-2023-01594 WAGO: WBM Command Injection in multiple products CVSS 3.1CRITICAL 9.8
  • TI-2020-06893 eap.c in pppd in ppp 2.4.2 through 2.4.8 has an rhostname buffer overflow in the eap_request and eap_response functions. CVSS 3.1CRITICAL 9.8
  • TI-2018-09314 An issue was discovered on WAGO e!DISPLAY 762-3000 through 762-3003 devices with firmware… CVSS 3.1HIGH 8.8
  • TI-2025-18921 Unauthenticated File Read via Web Interface CVSS 3.1MEDIUM 4.9
  • TI-2026-18391 Stack Overflow via Oversized Cookie Fields in lighttpd CVSS 3.1CRITICAL 9.8
  • TI-2026-18390 Stack Overflow via SESSIONID Cookie in lighttpd CVSS 3.1CRITICAL 9.8
See all 145 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences