CVE-2026-4184
Remote stack-based buffer overflow in D-Link DIR-816 CGI enables RCE.
Is CVE-2026-4184 being exploited?
Not confirmed. CVE-2026-4184 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 1.2% probability of exploitation in the next 30 days.
How severe is CVE-2026-4184?
CVE-2026-4184 is rated High with a CVSS score of 8.9. 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-2026-4184?
Not known from our data. No patch reference has been recorded for CVE-2026-4184, 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-2026-4184 affect?
CVE-2026-4184 affects D-Link DIR-816 (firmware 1.10CNB05), GoAhead CGI form2Wl5BasicSetup.cgi. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-4184?
Isolate/replace device; disable remote admin; upgrade to supported hardware
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution via crafted pskValue in GoAhead CGI; attacker could gain control of the router.
Monitor only
- affected1.10CNB05
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.