Security readout for executives and security teams
Plain-English summary
This Microsoft Edge vulnerability may allow unintended disclosure and limited modification of information. Its CVSS score is 4.8, indicating moderate severity. Exploitation requires high complexity, but the supplied vector indicates no privileges or user interaction are required. The source bundle does not establish widespread exposure or active exploitation.
Executive priority
Treat this as a routine but time-bound browser patching priority. Confirm exposure and complete normal update deployment promptly. Escalation beyond standard vulnerability-management timelines is not supported by the supplied evidence unless Microsoft guidance or internal telemetry reveals greater exposure.
Technical view
CVE-2024-21423 affects Microsoft Edge (Chromium-based) and is classified as CWE-693, failure of a protection mechanism. The CVSS 3.1 vector indicates network reachability, high attack complexity, no required privileges or interaction, unchanged scope, low confidentiality and integrity impact, and no availability impact.
Likely exposure
Organizations using Microsoft Edge (Chromium-based) may be exposed. The bundle lists version 1.0.0 but provides no complete affected-version range, deployment conditions, or fixed release. Exposure decisions should therefore be based on Microsoft’s current advisory and verified endpoint inventory.
Exploitation context
The CVE is not listed as CISA KEV in the supplied bundle. No cited source here establishes active exploitation, public exploit availability, or observed attacks. Although the vector indicates no user interaction, high attack complexity reduces practical exploitability relative to simpler network flaws.
Researcher notes
The bundle provides only a generic title, CVSS vector, CWE-693 classification, and vendor reference. It does not describe the vulnerable component, disclosure mechanism, prerequisites beyond CVSS, affected-version boundaries, indicators, or fixed build. Detailed root-cause or exploitability conclusions would be speculative.
Mitigation direction
- Review Microsoft’s advisory for authoritative affected and fixed Edge versions.
- Deploy the vendor-provided Edge security update across affected endpoints.
- Use browser management controls to keep Edge updates current.
- Reduce unsupported or unmanaged Edge installations until their status is verified.
Validation and detection
- Inventory installed Microsoft Edge versions across managed endpoints.
- Compare deployed versions with Microsoft’s current affected and fixed-version guidance.
- Confirm the security update installed successfully on representative and high-risk systems.
- Re-scan the fleet for outdated or unmanaged Edge installations.
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-693: 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-2024-21423 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
- 4.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/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:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C2.22.5microsoftVulnerability scoring details
Base CVSS 3.1 score
4.8MediumVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/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) Information Disclosure 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.
Protection Mechanism Failure
Protection Mechanism Failure represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.