7.7

CVE-2026-66310: microsoft edge External Control of File Name or Path

CVSS: 7.7v3.1HighAnalyzed
Published 03-08-2026Last modified 08-10-2026
Open JSON

Vulnerability summary

CVE-2026-66310 is a high (CVSS 7.7) External Control of File Name or Path vulnerability in microsoft edge. EPSS estimates a 0.36% chance of exploitation in the next 30 days, higher than 28.8% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.7/10
010
High · v3.1 (CVE.org)
EPSS score
0.36%
0%100%
Low · +0.14 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 03-08-2026
    PublishedVulnerability first disclosed.
  2. 08-10-2026
    Last modifiedVulnerability information updated.

Description

External control of file name or path in Microsoft Edge for Android allows an unauthorized attacker to disclose information locally.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.36%

Chance of exploitation in the next 30 days

Percentile

29%

Versus all other CVEs

30-day change

+0.14 pp

From 0.22% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.36%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Microsoft2 products

1 vendor · 2 products

References

1 links