What is CVE-2017-8582?

CVE-2017-8582 is a medium-severity vulnerability in Microsoft Windows 10, classified under Information Disclosure. CVSS score: 5.9/10. Published 2017-07-11.

How severe is CVE-2017-8582?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Is CVE-2017-8582 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Information disclosure in Microsoft Windows 10

CVE-2017-8582

HTTP.sys in Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allows an information disclosure vulnerability when the component improperly handles objects in memory, aka "Https.sys Information Disclosure Vulnerability".

Vulnerability class: Information Disclosure

Published 2017-07-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.083 (94.8th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.083 · newest: 0.083 · change: 0.000

Affected products

Microsoft Windows 10 — versions 1511, 1607, 1703
Microsoft Windows 7
Microsoft Windows 8.1
Microsoft Windows Rt 8.1
Microsoft Windows Server 2008 — versions r2
Microsoft Windows Server 2012 — versions r2
Microsoft Windows Server 2016
Microsoft Corporation Windows Server 2008 Sp2 And R2 Sp1, 7 8.1, 2012 Gold R2, Rt 10 Gold, 1511, 1607, 1703, 2016 — versions HTTP.sys

Weakness classification (CWE)

CWE-200 — Information Disclosure

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

www.securityfocus.com/bid/99429 (VDB Entry, Third Party Advisory, vdb-entry)
www.securitytracker.com/id/1038863 (VDB Entry, Third Party Advisory, vdb-entry)
portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2017-8582 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2017-8582?: CVE-2017-8582 is a medium-severity vulnerability in Microsoft Windows 10, classified under Information Disclosure. CVSS score: 5.9/10. Published 2017-07-11.
How severe is CVE-2017-8582?: Medium severity. CVSS v3 base score is 5.9 out of 10.
Is CVE-2017-8582 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.