CVE-2026-12496CWE-116CWE-79

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

High · published July 24, 2026

CVSS v4.0
8.7
EPSS
1%
Percentile
48.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
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
EPSS
0.00606 · 48.3th percentile
Weaknesses
CWE-116 · Improper Encoding or Escaping of Output; CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-07-24T13:57Z
EPSS history
Timeline
  • 24 JUL 13:57Z
    Loytec LINX firmware: Unauthenticated stored XSS in OPC XML-DA server
    cvelistv5