CVE-2026-55500
Unauthenticated full DB export/import exposes all credentials and allows takeover.
Is CVE-2026-55500 being exploited?
Not confirmed. CVE-2026-55500 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 0.69% probability of exploitation in the next 30 days.
How severe is CVE-2026-55500?
CVE-2026-55500 is rated Critical with a CVSS score of 9.9. 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-2026-55500?
Yes. A fix has been recorded for CVE-2026-55500. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-55500 affect?
CVE-2026-55500 affects 9Router (< 0.4.80), /api/settings/database endpoint, Self-hosted 9Router instances. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-55500?
Upgrade to 0.4.80; restrict endpoint access and rotate all secrets.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated full DB export/import via /api/settings/database; attackers can exfiltrate credentials, API keys, tokens, or overwrite DB to achieve takeover and disruption.
Immediate action required
- affected< 0.4.80
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.