CVE-2026-63586
Command injection in device web UI allows unauthenticated remote root execution.
Is CVE-2026-63586 being exploited?
Not confirmed. CVE-2026-63586 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 0.52% probability of exploitation in the next 30 days.
How severe is CVE-2026-63586?
CVE-2026-63586 is rated Critical with a CVSS score of 9.3. 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-2026-63586?
Yes. A fix has been recorded for CVE-2026-63586. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-63586 affect?
CVE-2026-63586 affects Embedded devices using modified uhttpd, Routers and network gateways with CGI shell scripts, Network appliances with web management UI. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-63586?
Isolate devices, block web UI access, apply vendor patch when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated remote command execution as root via crafted HTTP Basic username; full device compromise and persistence.
Immediate action required
- affected>= 1.52 and < 1.57
- affected>= 1.67 and < 1.74
- affected>= 1.67 and < 1.74
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.