CVE-2026-12496 PUBLISHED

Loytec LINX firmware: Unauthenticated stored XSS in OPC XML-DA server

Assigner: NCSC.ch
Reserved: 17.06.2026 Published: 24.07.2026 Updated: 24.07.2026

Stored Cross-Site Scripting (CWE-79) in the OPC XML-DA server statistics in Loytec LIP-ME201C, L-INX, L-GATE, L-ROC, L-IOB, L-DALI, L-VIS and L-PAD through 8.4.16 on LINX-A64 allows an unauthenticated remote attacker to execute arbitrary JavaScript in an administrator's browser (session hijacking, credential theft, device reconfiguration) via a crafted User-Agent header in a POST /da request.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 8.7

Product Status

Vendor Loytec
Product LIP-ME20xC
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)
Vendor Loytec
Product L-INX
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)
Vendor Loytec
Product L-GATE
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)
Vendor Loytec
Product L-ROC
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)
Vendor Loytec
Product L-IOB
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)
Vendor Loytec
Product L-DALI
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)
Vendor Loytec
Product L-VIS
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)
Vendor Loytec
Product L-PAD
Versions Default: unaffected
  • affected from 0 to 8.4.16 (incl.)

Solutions

Upgrade to firmware version 8.4.18.

Credits

  • Daniel Hulliger, armasuisse CYD Campus finder
  • Damian Pfammatter, armasuisse CYD Campus finder

References

Problem Types

  • CWE-79 Improper neutralization of input during web page generation ('cross-site scripting') CWE
  • CWE-116 Improper encoding or escaping of output CWE

Impacts

  • CAPEC-592 Stored XSS