Security readout for executives and security teams
Plain-English summary
A flaw in Microsoft Edge can let a remote, unauthenticated attacker bypass an unspecified browser security feature after user interaction. Expected impact is limited exposure or modification of information, with no availability impact identified. The supplied evidence does not establish active exploitation.
Executive priority
Schedule prompt remediation through normal browser patching processes. The moderate severity, required user interaction, and limited stated impact do not indicate an emergency based on supplied evidence. Escalate deployment priority where Edge is widely used for sensitive workflows or browser updates are delayed.
Technical view
CVE-2026-45492 is an improper input validation issue (CWE-20) in Chromium-based Microsoft Edge. CVSS 3.1 rates it 5.4: network-accessible, low complexity, no privileges required, user interaction required, unchanged scope, low confidentiality and integrity impact, and no availability impact.
Likely exposure
Endpoints running affected Microsoft Edge builds may be exposed when users interact with attacker-controlled network content. The bundle lists version 1.0.0.0 but provides no reliable affected-build range or fixed version, so organizations should verify applicability through Microsoft's advisory and endpoint browser inventory.
Exploitation context
The CVSS vector records exploit maturity as unproven, and the CVE is not listed as KEV in the supplied bundle. No cited evidence supports active exploitation. Exploitation requires user interaction, although neither the required interaction nor the bypassed security feature is described.
Researcher notes
The record identifies CWE-20 but does not describe the vulnerable component, validation failure, bypassed control, triggering interaction, affected build range, or fixed build. The supplied version value appears insufficient for practical scoping. Avoid inferring exploitability beyond the CVSS vector and vendor description.
Mitigation direction
- Apply the Microsoft Edge security update identified in Microsoft's advisory.
- Ensure managed Edge installations receive and restart into approved security updates.
- Review Microsoft's advisory for affected and fixed build information absent from this bundle.
- Prioritize systems handling sensitive browser-based workflows if immediate organization-wide deployment is impractical.
Validation and detection
- Inventory installed Edge versions across managed endpoints.
- Compare deployed versions with Microsoft's current affected and fixed build guidance.
- Confirm update policies are enabled and devices completed the required browser restart.
- Monitor security tooling for unusual browser activity without treating it as proof of this CVE.
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-20: Exact CWE lookup
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Open ATT&CK lookupCVE-2026-45492 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) Security Feature Bypass 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.