CVE-2026-16096
Remote stack-based buffer overflow in Shibby Tomato RT-N5x firmware enabling remote RCE.
Is CVE-2026-16096 being exploited?
Not confirmed. CVE-2026-16096 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 0.79% probability of exploitation in the next 30 days.
How severe is CVE-2026-16096?
CVE-2026-16096 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-2026-16096?
Not known from our data. No patch reference has been recorded for CVE-2026-16096, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-16096 affect?
CVE-2026-16096 affects Shibby Tomato 1.28 RT-N5x MIPSR2 Build 124, Routers running Shibby Tomato or compatible MIPSR2 Tomato forks, Home/SOHO routers with affected firmware. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-16096?
Isolate devices, replace Shibby Tomato with maintained FreshTomato or vendor firmware; block WAN management.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution via crafted /proc/webmon_recent_domains input, enabling device compromise and network pivoting.
Immediate action required
- affected1.28 RT-N5x MIPSR2 Build 124
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.