CVE-2019-25651

Status: Awaiting AnalysisCritical (9)—

Ubiquiti UniFi Network Controller prior to 5.10.12 (excluding 5.6.42), UAP FW prior to 4.0.6, UAP-AC, UAP-AC v2, and UAP-AC Outdoor FW prior to 3.8.17, USW FW prior to 4.0.6, USG FW prior to 4.4.34 uses AES-CBC encryption for device-to-controller communication, which contains cryptographic weaknesses that allow attackers to recover encryption keys from captured traffic. Attackers with adjacent network access can capture sufficient encrypted traffic and exploit AES-CBC mode vulnerabilities to derive the encryption keys, enabling unauthorized control and management of network devices.

CVSS

Version: 4.0
Vector: CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Base score: 9

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.08%
Percentile among all scored CVEs: 0
Score date: 10/5/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1210 Exploitation of Remote Serviceslateral movement75 %
Primary impactT1556 Modify Authentication Processdefense impairment · persistence · credential access70 %
Secondary impactT1098 Account Manipulationpersistence · privilege escalation65 %
Secondary impactT1565.001 Stored Data Manipulationimpact60 %

AV:A (red adyacente) sin privilegios ni interacción dicta T1210. AES-CBC débil permite recuperar claves y controlar dispositivos (T1556: modificación de autenticación/autorización); acceso a cuentas (T1098) y manipulación de datos de configuración (T1565.001).

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Restrict File and Directory Permissions Privileged Account Management User Account Management Operating System Configuration Network Segmentation Multi-factor Authentication

Affected technologies (5)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

UI — UAP^AI UI — UAP AC^AI UI — Unifi Network Controller^AI UI — USG^AI UI — USW^AI

CWEs

CWE-327

References

Raw JSON (NVD)

Show

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  "published": "2026-03-27T22:16:19.107",
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    }
  ],
  "lastModified": "2026-06-17T02:32:53.510",
  "sourceIdentifier": "disclosure@vulncheck.com"
}