Security readout for executives and security teams
Plain-English summary
CVE-2026-21635 affects Ubiquiti UniFi Connect EV Station Lite devices running v1.5.2 and earlier. A nearby attacker within Wi-Fi range may be able to use the WiFi AutoLink feature even when the device was adopted only through Ethernet. The risk is localized but could expose sensitive information.
Executive priority
Treat as a targeted, location-dependent issue. Prioritize sites where EV chargers are accessible to the public or untrusted visitors. Confirm firmware status and follow Ubiquiti’s advisory, but this does not currently indicate emergency internet-wide exploitation.
Technical view
The issue is classified as improper access control (CWE-284). CVSS 3.1 is 5.3, with adjacent-network access, high attack complexity, no privileges, no user interaction, and high confidentiality impact. The public description limits the scenario to EV Station Lite v1.5.2 and earlier using WiFi AutoLink after Ethernet-only adoption.
Likely exposure
Exposure is likely limited to organizations with UniFi Connect EV Station Lite devices on v1.5.2 or earlier where attackers can get within Wi-Fi range. Internet exposure is not indicated by the CVSS vector or description.
Exploitation context
No active exploitation is stated in the provided sources, and the CVE is not listed as KEV in the source bundle. The attack is adjacent-network and high-complexity, which reduces broad exploitation likelihood but still matters for public, shared, or poorly controlled parking environments.
Researcher notes
Public data is sparse. The CVE description identifies the feature, access condition, affected version ceiling, CWE, and CVSS vector, but does not provide technical root cause details or a named fixed version in the supplied bundle.
Mitigation direction
- Review Ubiquiti Security Advisory Bulletin 059 for vendor-confirmed remediation guidance.
- Inventory EV Station Lite deployments and identify devices running v1.5.2 or earlier.
- Limit physical and Wi-Fi proximity access around deployed charging equipment where feasible.
- Avoid assuming Ethernet-only adoption disables all Wi-Fi-related risk until vendor guidance is applied.
Validation and detection
- Confirm EV Station Lite model and firmware version in UniFi management interfaces.
- Check whether devices were adopted via Ethernet and whether WiFi AutoLink is available or enabled.
- Compare findings against Ubiquiti Security Advisory Bulletin 059.
- Monitor vendor advisory updates for corrected versions or configuration mitigations.
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-2026-21635 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
- Medium
- CVSS
- 5.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
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.
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:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N1.63.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source materials
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.