CVE-2026-12496
Stored XSS in Loytec OPC XML-DA server allows unauthenticated JS execution in admin browser.
Is CVE-2026-12496 being exploited?
Not confirmed. CVE-2026-12496 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.36% probability of exploitation in the next 30 days.
How severe is CVE-2026-12496?
CVE-2026-12496 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-12496?
Yes. A fix has been recorded for CVE-2026-12496. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-12496 affect?
CVE-2026-12496 affects Loytec LIP-ME201C, L-INX (LINX-A64 up to 8.4.16), L-GATE, L-ROC, and 4 further products or versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-12496?
Upgrade affected devices to fixed firmware; restrict admin UI access and sanitize logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attacker injects JS via User-Agent in POST /da, enabling admin session hijack, credential theft, and device reconfiguration.
Immediate action required
- affected<= 8.4.16
- affected<= 8.4.16
- affected<= 8.4.16
- affected<= 8.4.16
- affected<= 8.4.16
- affected<= 8.4.16
- affected<= 8.4.16
- affected<= 8.4.16
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.