CVE record · CVE-2017-0263

Use after free in Microsoft Corporation Microsoft Windows

CVSS 7.8 HighCriticalIn CISA KEVEPSS 0.10 · 95th percentile

Critical, because:

In CISA’s KEV catalogue since 10 Feb 2022: it is known to be exploited.
CVSS score 7.8 (7.0 or more) and EPSS 0.10 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

Published by the CVE Program (CNA: microsoft) at 12 May 2017, 14:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Microsoft Corporation	Microsoft Windows	affected 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, 1703, and Windows Server 2016

Identifiers: CVE-2017-0263
CNA: microsoft
Weakness (CWE): CWE-416
Tags: Microsoft Corporation Microsoft Windows
Memory corruption
Published: 12 May 2017
Updated: 21 Oct 2025

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.8	High	3.1	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	ADP (CISA-ADP)

CISA KEV Listed since 10 Feb 2022: known to be exploited.
EPSS 0.10, the 95th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 12 May 2017. New records show when each source confirmed them.

Sources

References from the CNA

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0263 confirm
www.securitytracker.com/id/1038449 vdb-entrysectrack
www.securityfocus.com/bid/98258 vdb-entrybid
xiaodaozhi.com/exploit/117.html
www.exploit-db.com/exploits/44478/ exploitexploit-db

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.