Security readout for executives and security teams
Plain-English summary
CVE-2026-77557 is a critical access-control flaw in Ubiquiti UniFi Protect AI Key. An attacker able to reach the device over a network may gain higher privileges without credentials or user interaction, potentially compromising its data, configuration, and availability. The supplied evidence does not establish which deployed versions are vulnerable.
Executive priority
Treat as an immediate validation and remediation priority because unauthenticated network access may lead to complete device compromise. Prioritize internet-exposed or broadly reachable AI Keys first. Urgency is driven by technical severity; active exploitation is not established by the supplied evidence.
Technical view
The issue is classified as CWE-284, Improper Access Control. Its CVSS 3.1 score is 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), indicating remote, low-complexity, unauthenticated exploitation with high confidentiality, integrity, and availability impact. Published version information is ambiguous: the bundle lists version "0" while the default status is unaffected.
Likely exposure
Exposure is highest where a UniFi Protect AI Key is reachable from untrusted, guest, broadly accessible, or internet-connected networks. Exact exposure cannot be determined from the supplied version data. Organizations should identify these devices and compare installed versions with Ubiquiti's advisory.
Exploitation context
The source bundle says exploitation requires network access but no privileges or user interaction. CVE-2026-77557 is not listed as KEV in the supplied data, and no cited source establishes active exploitation, public exploit availability, or observed attacks.
Researcher notes
The record supports remote privilege escalation caused by improper access control, but provides no vulnerable function, protocol, attack details, fixed release, or reliable affected-version range. The version value "0" and default-unaffected status require clarification from the vendor advisory. Avoid treating every AI Key release as vulnerable without that confirmation.
Mitigation direction
- Consult Ubiquiti Security Advisory Bulletin 067 for affected and remediated firmware details.
- Apply vendor-recommended remediation after confirming the applicable AI Key version.
- Restrict AI Key network access to trusted administrative and Protect infrastructure networks.
- Avoid exposing the device directly to the public internet or untrusted network segments.
- Increase monitoring until vendor remediation is confirmed.
Validation and detection
- Inventory all UniFi Protect AI Key devices and record installed firmware versions.
- Compare each installed version with Ubiquiti Security Advisory Bulletin 067.
- Verify untrusted networks cannot reach affected devices.
- Confirm vendor-recommended remediation was applied successfully.
- Review device administration and configuration activity for unexplained privilege or settings changes.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-284: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-77557 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9UbiquitiVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://community.ui.com/releases/Security-Advisory-Bulletin-067/fc4a3488-7c43-4628-8bab-f715e96dbfc9CVE reference, Ubiquiti
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Access Control
Improper Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.