What is CVE-2016-5101?

CVE-2016-5101 is a high-severity vulnerability in Microsoft Windows, classified under Improper Access Control. CVSS score: 8.8/10. Published 2016-06-29.

How severe is CVE-2016-5101?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Microsoft Windows

CVE-2016-5101

Unspecified vulnerability in Opera Mail before 2016-02-16 on Windows allows user-assisted remote attackers to execute arbitrary code via a crafted e-mail message.

Published 2016-06-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.030 (86.7th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 86.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.029 · newest: 0.030 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

www.opera.com/blogs/security/2016/02/opera-12-and-opera-mail-security-update/ (Vendor Advisory)
www.securityfocus.com/bid/91507 (vdb-entry)

Frequently asked questions

What is CVE-2016-5101?: CVE-2016-5101 is a high-severity vulnerability in Microsoft Windows, classified under Improper Access Control. CVSS score: 8.8/10. Published 2016-06-29.
How severe is CVE-2016-5101?: High severity. CVSS v3 base score is 8.8 out of 10.