Security readout for executives and security teams
Plain-English summary
This is a Microsoft Edge for Android spoofing issue where critical browser UI information can be misrepresented. The business risk is user trust: people may see misleading security or identity cues. The public bundle names an official Microsoft advisory and patch, but does not provide exploit details.
Executive priority
Prioritize normal mobile browser patching. Escalate if Edge for Android is widely deployed in managed fleets or used for sensitive workflows, because spoofed browser signals can undermine user decisions.
Technical view
CVE-2026-0391 is a CWE-451 UI misrepresentation flaw in Microsoft Edge (Chromium-based) for Android. CVSS 3.1 is 6.5 with network attack vector, high complexity, no privileges required, no user interaction, unchanged scope, high confidentiality impact, and low integrity impact.
Likely exposure
Exposure is most relevant to Android devices where Microsoft Edge is installed. The bundle lists Microsoft Edge (Chromium-based) version 1.0.0.0 but provides no CPEs or detailed affected-version range.
Exploitation context
The bundle does not show active exploitation. KEV is false and the CVSS exploit maturity is unproven. Treat this as a patch-management issue, not confirmed incident activity.
Researcher notes
Public evidence is sparse. The sources identify CWE-451, Android Edge, network reachability, and official remediation, but do not include root-cause detail, proof-of-concept status, or precise affected-version ranges beyond the bundle entry.
Mitigation direction
- Apply the Microsoft advisory patch or update guidance for CVE-2026-0391.
- Inventory Android devices with Microsoft Edge installed.
- Use MDM or managed app stores to enforce Edge updates.
- Monitor Microsoft’s advisory for affected-version or remediation changes.
Validation and detection
- Confirm Edge for Android exists in mobile asset inventory.
- Compare installed Edge versions with the Microsoft CVE advisory.
- Verify managed devices received the patched application version.
- Document exceptions for unmanaged or unreachable Android devices.
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-451: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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-2026-0391 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
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C
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:H/PR:N/UI:N/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C2.24.2microsoftVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C
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
- Microsoft Edge (Chromium-based) for Android Spoofing VulnerabilityCVE reference, microsoft · vendor-advisory, patch
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.
User Interface (UI) Misrepresentation of Critical Information
User Interface (UI) Misrepresentation of Critical Information represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.