Security readout for executives and security teams
Plain-English summary
This Microsoft Edge vulnerability could let malicious web content mislead a user and expose or alter limited information. Exploitation requires user interaction and does not affect availability. The supplied CVSS score is 5.4, making this a moderate business risk rather than an emergency based on current evidence.
Executive priority
Schedule prompt remediation through normal browser-patching operations. Escalate priority for high-exposure users, but current evidence does not justify emergency incident response unless local telemetry indicates attempted exploitation.
Technical view
CVE-2026-45494 is a Chromium-based Edge spoofing issue classified as CWE-79. Its CVSS 3.1 vector indicates network reachability, low complexity, no required privileges, required user interaction, unchanged scope, low confidentiality and integrity impact, and no availability impact.
Likely exposure
Exposure is most relevant where Microsoft Edge users interact with untrusted web content. The bundle lists affected version 1.0.0.0, but provides no supported-build range or deployment detail; administrators should confirm applicability against Microsoft's advisory and their installed Edge builds.
Exploitation context
The bundle does not establish active exploitation. CISA KEV status is false, and the CVSS temporal metric marks exploit maturity as unproven. Successful exploitation requires user interaction; no additional attack prerequisites or observed campaigns are documented in the supplied sources.
Researcher notes
The evidence identifies spoofing, CWE-79, CVSS 5.4, required interaction, and limited confidentiality and integrity impact. It provides no technical root cause, affected build range beyond 1.0.0.0, exploit details, campaign evidence, or explicit fixed version. Consult Microsoft for those specifics.
Mitigation direction
- Review Microsoft's CVE advisory for the applicable patched Edge release.
- Update affected Edge installations through approved enterprise browser-management channels.
- Prioritize systems whose users frequently access untrusted or externally supplied web content.
- Maintain anti-phishing controls because exploitation requires user interaction.
Validation and detection
- Inventory installed Microsoft Edge versions across managed endpoints.
- Compare discovered builds with Microsoft's affected and patched version guidance.
- Confirm browser-management reporting shows successful update deployment.
- Re-scan or re-inventory endpoints after remediation to identify update failures.
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-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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-2026-45494 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
- 5.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/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:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C2.82.5microsoftVulnerability scoring details
Base CVSS 3.1 score
5.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/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) 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.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.