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Fencer Vulns
medium 5.3

CVE-2016-3388 json

Microsoft Internet Explorer 10 and 11 and Microsoft Edge do not properly restrict access to private namespaces, which allows remote attacke…

published 2016-10-14 10 y ago modified 2026-06-17 4 mo ago also EUVD-2016-4416

cvss
5.3
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
27.6%
EPSS 27.6% chance of exploitation in 30 days, percentile 98%
public exploits
1
Exploit-DB

Summary

Microsoft Internet Explorer 10 and 11 and Microsoft Edge do not properly restrict access to private namespaces, which allows remote attackers to gain privileges via unspecified vectors, aka "Microsoft Browser Elevation of Privilege Vulnerability," a different vulnerability than CVE-2016-3387.

Timeline

  1. Published
  2. First public exploit (EDB-40606)

Exploit prediction

27.59% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-40606 Microsoft Windows Edge/Internet Explorer - Isolated Private Namespace Insecure DACL Privilege Escalation (MS16-118) local, 2016-10-20

CVSS scores

assigned by version score vector
NVD 3.0 5.3 CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
NVD 2.0 2.6 AV:N/AC:H/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.