Security readout for executives and security teams
Plain-English summary
CVE-2021-24100 is a Microsoft Edge for Android information disclosure issue. It is rated medium, but the CVSS vector indicates potential high confidentiality impact if the required local access, low privileges, and user interaction conditions are met.
Executive priority
Treat as a moderate mobile-browser confidentiality risk. Prioritize managed Android fleets and users handling sensitive data, but do not escalate as an emergency without exploitation evidence.
Technical view
The CVSS 3.1 vector is AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N, meaning exploitation is local, low complexity, requires low privileges and user interaction, and affects confidentiality only. The bundle names Microsoft Edge for Android but does not provide affected build ranges.
Likely exposure
Exposure is limited to Android devices with Microsoft Edge for Android installed. The source bundle does not identify specific vulnerable versions, so organizations need inventory and vendor-version checks to confirm scope.
Exploitation context
The bundle does not show CISA KEV listing or active exploitation evidence. The CVSS temporal metric lists proof-of-concept maturity, but no exploit details are provided here.
Researcher notes
Evidence is sparse. MSRC and CVE metadata identify product, class, severity, and CVSS conditions, but not vulnerable version ranges, exposed data type, root cause, or detailed remediation text in the provided bundle.
Mitigation direction
- Apply Microsoft Edge for Android updates from official app sources.
- Use MDM to enforce managed app updates for Edge on Android.
- Check MSRC for fixed build or version guidance.
- Remove Edge from unmanaged Android devices if it is not required.
- Track mobile browser update compliance until exposure is closed.
Validation and detection
- Inventory Android devices with Microsoft Edge installed.
- Compare installed Edge versions against Microsoft guidance.
- Confirm app update enforcement through MDM reporting.
- Review whether affected devices are managed or personally owned.
- Document devices that cannot be updated promptly.
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.
CVE-2021-24100 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 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N/E:P/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.
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:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C1.33.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-24100CVE reference · x_refsource_MISC
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.