Intel

CVE-2026-77535

UniFi: Improper Input Validation (CVE-2026-77535)

criticalEPSS 1.3%

Affected

  • Ubiquiti/UniFi = OS..OS

Description

A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi Network Application to execute a Command Injection on an adopted device.

Source: BSI WID PortalBSI CSAFNVD (NIST)cvelistv5CVE.org (MITRE)

Affected products

The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

UbiquitiUniFi
OS

Metrics

XIEM Effective CVSS
9.1
Source: cna-v3
EPSS percentile
69.5 %
High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
KEV status
—
Show all metrics
Severity
critical
Priority score
111.19
Exploit maturity
no public PoC known
CVSS v3
9.1
EPSS score
1.3 %
Moderate — model estimates 1-10% exploitation likelihood.
Published
2026-08-26 10:16 UTC
CWE
CWE-20

Weakness classes (CWE)

  • CWE-20Class

    Improper Input Validation

    The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

    cwe.mitre.org →

References & sources