Intel

CVE-2026-50748

unifi_access: Improper Input Validation (CVE-2026-50748)

criticalEPSS 1.6%

Affected

  • ui/unifi_access lt *..4.2.29

Description

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

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

Affected products

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

uiunifi_access
4.2.29fixed from 4.2.29

Metrics

XIEM Effective CVSS
9.9
Source: nvd-v3
EPSS percentile
75.5 %
High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
KEV status
—
Show all metrics
Severity
critical
Priority score
116.32
Exploit maturity
no public PoC known
CVSS v3
9.9
EPSS score
1.6 %
Moderate — model estimates 1-10% exploitation likelihood.
Published
2026-07-02 15:17 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

Reanalysis & status changes

Chronological NVD audit events for this CVE — reanalyses, CVSS updates, CPE diffs.

  1. Reanalysis2026-08-17 15:12 UTC· nvd@nist.gov
    • CPE Configuration: OR *cpe:2.3:a:ui:unifi_access_application:*:*:*:*:*:*:*:* versions up to (excluding) 4.2.29 → OR *cpe:2.3:a:ui:unifi_access:*:*:*:*:*:*:*:* versions up to (excluding) 4.2.29
  2. Initial Analysis2026-07-09 13:21 UTC· nvd@nist.gov
    • CPE Configuration: OR *cpe:2.3:a:ui:unifi_access_application:*:*:*:*:*:*:*:* versions up to (excluding) 4.2.29
    • Reference Type: HackerOne: https://community.ui.com/releases/Security-Advisory-Bulletin-066-066/984eceb3-49c8-4227-942d-671c289b3afc Types: Vendor Advisory
  3. CVE Modified2026-07-02 17:17 UTC· 134c704f-9b21-4f2e-91b3-4a467353bcc0
    • SSVC: {"id":"CVE-2026-50748","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalI…
  4. New CVE Received2026-07-02 15:17 UTC· support@hackerone.com
    • Affected: UniFi Access Application
    • Description: A malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability found in UniFi Access Application to execute a Command Injection on the host device.
    • CVSS V3.1: AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
    • CWE: CWE-20

Linked advisories