CVE-2026-75118
Pre-auth stack buffer overflow in TP-Link TL-MR100 /cgi/login enabling RCE.
Is CVE-2026-75118 being exploited?
Not confirmed. CVE-2026-75118 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 0.25% probability of exploitation in the next 30 days.
How severe is CVE-2026-75118?
CVE-2026-75118 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-2026-75118?
Yes. A fix has been recorded for CVE-2026-75118. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-75118 affect?
CVE-2026-75118 affects TP-Link TL-MR100 (firmware v3.20), httpd web management /cgi/login. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-75118?
Apply TP-Link firmware update or disable/restrict web management access and block remote admin ports.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated adjacent attacker can trigger stack buffer overflow via /cgi/login to crash httpd or achieve arbitrary code execution.
Immediate action required
- affected< (EU)_1.3.0 Build 260609
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.