Security readout for executives and security teams
Plain-English summary
CVE-2026-45495 is a high-severity Microsoft Edge vulnerability that could let an attacker run code after a user interacts with malicious content. Successful exploitation could compromise information, alter data, or disrupt the device. The supplied evidence does not identify the vulnerable browser component or describe the required interaction.
Executive priority
Treat this as a high-priority browser patching issue because exploitation could provide broad device compromise after user interaction. Promptly establish the actual affected build range, measure deployment exposure, and enforce Microsoft’s update. Escalate urgency if Microsoft or KEV later reports active exploitation.
Technical view
The CVSS 3.1 score is 8.8: network-accessible, low complexity, no privileges required, but user interaction is required. Successful exploitation reportedly enables code execution with high confidentiality, integrity, and availability impact. The listed CWEs are broad, and the sources provide no root-cause, attack-path, sandbox-boundary, or fixed-build details.
Likely exposure
Exposure likely concerns Microsoft Edge users who interact with attacker-controlled content while running an affected build. However, the supplied version value, 1.0.0.0, is insufficient for dependable inventory matching. Confirm affected and fixed Edge versions directly in Microsoft’s advisory before determining organisational exposure.
Exploitation context
The bundle marks this CVE as absent from KEV and the CVSS vector reports unproven exploit maturity. No supplied source supports active exploitation. This does not prove exploitation is impossible or absent; current threat status should be monitored through Microsoft and authoritative vulnerability catalogues.
Researcher notes
The record supplies a title, CVSS vector, broad CWE mappings, and one questionable affected-version value, but no technical root cause, vulnerable component, proof of concept, exploitation telemetry, or fixed build. Avoid deriving exploitability beyond the vector. Vendor build information is necessary for reliable detection and remediation validation.
Mitigation direction
- Review Microsoft’s advisory for confirmed affected and fixed Edge builds.
- Update Edge to Microsoft’s supported patched release where applicable.
- Prioritise managed endpoints used for web browsing or handling untrusted links.
- Use browser update enforcement and compliance policies to reduce patch delays.
- Monitor Microsoft guidance for additional mitigations or exploitation updates.
Validation and detection
- Inventory deployed Edge versions across managed endpoints.
- Compare installed builds with Microsoft’s authoritative affected and fixed version ranges.
- Verify browser update policies are enabled and successfully applying updates.
- Confirm patched builds through endpoint-management or software-inventory telemetry.
- Recheck Microsoft and KEV sources for updated exploitation information.
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-119: 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 lookupCWE-20: 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 lookupCWE-35: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. 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 lookupCWE-94: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-45495 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
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/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:H/I:H/A:H/E:U/RL:O/RC:C2.85.9microsoftVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/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) Remote Code Execution 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.