Security readout for executives and security teams
Plain-English summary
CVE-2026-58300 is an information disclosure issue in Microsoft Edge for Android. A local, unauthorized attacker could use absolute path traversal to access information on the device. Public data points to a Microsoft advisory and an available remediation, but the provided sources do not specify detailed fixed version information.
Executive priority
Treat as a routine but timely mobile-app update issue. The main business risk is local data exposure on Android devices using Edge, especially in managed environments with sensitive data. No evidence of active exploitation is provided.
Technical view
The vulnerability is classified as CWE-36: Absolute Path Traversal. CVSS 3.1 is 6.2, with local attack vector, low complexity, no privileges, no user interaction, and high confidentiality impact. Integrity and availability are not affected. The listed affected product is Microsoft Edge (Chromium-based) for Android.
Likely exposure
Exposure is likely limited to Android devices with vulnerable Microsoft Edge for Android installed. The bundle lists version 1.0.0.0, but fixed-version detail is not included. Organizations managing Android fleets should verify installed Edge versions against Microsoft guidance.
Exploitation context
No active exploitation is indicated in the provided sources, and the CVE is not marked KEV. The attack is local, not network-based, and appears focused on information disclosure rather than device takeover or service disruption.
Researcher notes
The public bundle is sparse. It identifies path traversal, local attack vector, high confidentiality impact, and Microsoft as the remediation source. Do not assume broader Android, Chromium, or desktop Edge impact from these sources alone.
Mitigation direction
- Review Microsoft’s MSRC advisory for the current fixed version and update guidance.
- Update Microsoft Edge for Android through the approved enterprise or app-store channel.
- Prioritize managed Android devices handling sensitive business or regulated data.
- Monitor Microsoft guidance for any revised affected-version or exploitation information.
Validation and detection
- Inventory Android devices with Microsoft Edge installed.
- Compare installed Edge versions against Microsoft’s advisory and enterprise app records.
- Confirm devices receive mobile app updates through MDM or app-store controls.
- Document exceptions where Edge 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.
CWE-36: 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 lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-58300 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
- 6.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/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:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C2.53.6microsoftVulnerability scoring details
Base CVSS 3.1 score
6.2MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/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 for Android 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.