Widely deployed UniFi network infrastructure; crypto flaw enables key recovery and device takeover.
CVE-2019-25651
AES-CBC flaw lets attackers recover keys and control UniFi devices.
Is CVE-2019-25651 being exploited?
Not confirmed. CVE-2019-25651 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 0.08% probability of exploitation in the next 30 days.
How severe is CVE-2019-25651?
CVE-2019-25651 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-2019-25651?
Yes. A fix has been recorded for CVE-2019-25651. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2019-25651 affect?
CVE-2019-25651 affects Ubiquiti UniFi Network Controller < 5.10.12 (excluding 5.6.42), UAP FW < 4.0.6, UAP-AC, UAP-AC v2, and 3 further products or versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2019-25651?
Update to latest controller/firmware; rotate keys.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Adjacent attacker can recover keys from traffic and take over UniFi network devices.
Patch when possible
- affected< 5.6.42
- affected>= 5.6.43 and < 5.10.12
- affected< 3.8.17
- affected< 4.0.6
- affected< 4.4.34
- affected< 4.0.6
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.