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CVE-2026-58300 Microsoft CVE debrief

CVE-2026-58300 is an absolute path traversal vulnerability in Microsoft Edge for Android. An unauthorized attacker could exploit this vulnerability to disclose information locally. The vulnerability has a CVSS score of 6.2 and a severity of MEDIUM. This vulnerability affects users of Microsoft Edge for Android. The CVE record was published on 2026-07-03T21:17:05.023Z and has not been modified since then. The NVD entry is currently Analyzed.

Vendor
Microsoft
Product
Microsoft Edge (Chromium-based)
CVSS
MEDIUM 6.2
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-03
Original CVE updated
2026-07-07
Advisory published
2026-07-03
Advisory updated
2026-07-07

Who should care

Users of Microsoft Edge for Android, security teams, and system administrators should be aware of this vulnerability and apply the latest updates to mitigate this vulnerability. This vulnerability could potentially allow unauthorized disclosure of information locally.

Technical summary

CVE-2026-58300 is an absolute path traversal vulnerability in Microsoft Edge for Android. An unauthorized attacker could exploit this vulnerability to disclose information locally. The vulnerability has a CVSS score of 6.2 and a severity of MEDIUM. Affected users should apply the latest updates to Microsoft Edge for Android to mitigate this vulnerability.

Defensive priority

Apply the latest updates to Microsoft Edge for Android to mitigate this vulnerability. Verify the integrity of the system and monitor for suspicious activity.

Recommended defensive actions

  • Apply the latest updates to Microsoft Edge for Android
  • Monitor for suspicious activity
  • Verify the integrity of the system
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record was published on 2026-07-03T21:17:05.023Z and has not been modified since then. The NVD entry is currently Analyzed. This vulnerability affects Microsoft Edge for Android, allowing an unauthorized attacker to disclose information locally. The CVSS score is 6.2 and the severity is MEDIUM. Users should verify the integrity of the system and apply the latest updates to mitigate this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-58300 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-58300

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-58300 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-58300

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.