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Full vulnerability report · 2026
CVE-2026-77533High confidence

Ubiquiti Inc UniFi Protect Application: Improper Input Validation

Ubiquiti Inc · UniFi Protect Application

9.9CriticalCVSS 3.1
Recommended action
Within 7 days

Critical technical severity; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-66378

No EUVD known-exploited evidence

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

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
9.9 · CVSS 3.1
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

Critical technical severity; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
01

What, why and how

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

What

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

Why

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.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

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

Why

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.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Improper Input Validation → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
Low: a basic authenticated account is required
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Changed: exploitation can affect a different security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-20 ↗

CWE-20: 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.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SChangedScope: The attack can affect a component governed by a different security authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkCWE-20
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-66378Official EUVD mapping

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

Official EUVD record
BSI · German · WID-SEC-W-2026-3028Ubiquiti UnifiOS: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Ubiquiti UnifiOS ausnutzen, um beliebigen Programmcode auszuführen, um seine Privilegien zu erhöhen und um Sicherheitsvorkehrungen zu umgehen.

Official advisory
CSIRT Italia · Italian · aggiornamenti-disponibili-per-i-prodotti-ubiquitiAggiornamenti disponibili per i prodotti Ubiquiti

nuova finestra - - CVE-2026-77548 : apre una nuova finestra - - CVE-2026-77547 : apre una nuova finestra - - CVE-2026-77546 : apre una nuova finestra - - CVE-2026-77545 : apre una nuova finestra - - CVE-2026-77543 : apre una nuova finestra - - CVE-2026-77542 : apre una nuova finestra - - CVE-2026-77541 : apre una nuova finestra - - CVE-2026-77540 : apre una nuova finestra - - CVE-2026-77539 : apre una nuova finestra - - CVE-2026-77538 : apre una nuova finestra - - CVE-2026-77537 : apre una nuova finestra - - CVE-2026-77536 : apre una nuova finestra - - CVE-2026-77535 : apre una nuova finestra - - CVE-2026-77534 : apre una nuova finestra - - CVE-2026-77533 : apre una nuova finestra - - CVE-2026-77532 : apre una nuova finestra - - Riferimenti (2) https://uisp.community.ui.com/releases/Security-Advisory-Bulletin-068-068/b95ea5e8-1a80-4ffc-ad42-625eae300cc9 https://community.ui.com/releases/Security-Advisory-Bulletin-067/fc4a3488-7c43-4628-8bab-f715e96dbfc9 Change log Titolo della tabella Versione Note Data 1.0 Pubblicato il 26-08-2026 26/08/2026 Impatto sistemico Alto (66.66) Argomenti Ubiquiti UniFi Data pubblicazione 26/08/26 ore 15:54 Data Ultimo Aggiornamento 26/08/26 ore 15:54 Informazioni su Agenzia per la cybersicurezza nazionale Contatti info@acn.gov.it Denunce, segnalazioni o esposti de

Official advisory
NCSC-NL · Dutch · NCSC-2026-0330Kwetsbaarheden verholpen in UniFi-producten van Ubiquiti

A low-privilege network attacker can exploit an Improper Input Validation vulnerability in the UniFi Protect Application to perform command injection on the host device.

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix not verified
Affected
< 7.2.105
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 26 Aug 2026 · Last source change 26 Aug 2026, 15:46 UTC · CWE-20 · Improper Input Validation

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-26
European sourceENISA EUVD · EUVD-2026-66378
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD not scheduled

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →
  1. BlackTree coverageBlackTree article coverage changed from no BlackTree article to 1 BlackTree article.
    Before
    no BlackTree article
    After
    1 BlackTree article
    BlackTree editorial ↗
  2. ENISA EUVD mappingEUVD-2026-66378 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2026-66378"}
    ENISA EUVD ↗
  3. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2026-66378↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-77533 · cve.blacktree.nl