Vulnerability · Published Jul 24, 2026 · Assigned by NCSC.ch

CVE-2026-12496Loytec LINX firmware: Unauthenticated stored XSS in OPC XML-DA server

High 8.7

In plain English

A high-severity cross-site scripting in L-DALI from Loytec. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities).

Severity (CVSS 4.0)8.7High

Exploit odds (30 days)0.6%top 50.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Loytec	LIP-ME20xC	0 – through 8.4.16
Loytec	L-INX	0 – through 8.4.16
Loytec	L-GATE	0 – through 8.4.16
Loytec	L-ROC	0 – through 8.4.16
Loytec	L-IOB	0 – through 8.4.16
Loytec	L-DALI	0 – through 8.4.16
Loytec	L-VIS	0 – through 8.4.16
Loytec	L-PAD	0 – through 8.4.16

Weakness: CWE-79, CWE-116 · 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

References

https://www.loytec.com/support/product-security/advisories/8522-dibt-cve-20260526-0004-unauthenticated-stored-xxs-in-opc-xml-da-server-statistics-high vendor-advisory