CVE-2025-12686
RCE via unchecked input size in Synology BeeStation AdminCenter.
Is CVE-2025-12686 being exploited?
Not confirmed. CVE-2025-12686 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 2.8% probability of exploitation in the next 30 days.
How severe is CVE-2025-12686?
CVE-2025-12686 is rated Critical. 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-2025-12686?
Yes. A fix has been recorded for CVE-2025-12686. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2025-12686 affect?
CVE-2025-12686 affects Synology BeeStation OS AdminCenter (pre-1.3.2-65648). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2025-12686?
Patch to 1.3.2-65648+; restrict AdminCenter access.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution on affected NAS; attacker can run arbitrary commands.
Immediate action required
- affected>= 1.3 and < 1.3.2-65648
- affected>= 1.2 and < 1.3.2-65648
- affected>= 1.1 and < 1.3.2-65648
- affected>= 1.0 and < 1.3.2-65648
- affected< 1.0
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.