CVE-2018-8253 — An elevation of privilege vulnerability exists when Microsoft Cortana allows arb

An elevation of privilege vulnerability exists when Microsoft Cortana allows arbitrary website browsing on the lockscreen, aka "Microsoft Cortana Elevation of Privilege Vulnerability." This affects Windows Server 2016, Windows 10.

01What is this vulnerability?

An elevation of privilege vulnerability exists when Microsoft Cortana allows arbitrary website browsing on the lockscreen, aka "Microsoft Cortana Elevation of Privilege Vulnerability." This affects Windows Server 2016, Windows 10.

02Affected products

Vendor	Product	Versions
Microsoft	Windows Server 2016	(Server Core installation)
Microsoft	Windows 10	Version 1607 for 32-bit Systems, Version 1607 for x64-based Systems

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2018-08-15T17:00:00.000Z
• Last modified: 2024-08-05T06:46:13.802Z

09References

• www.securitytracker.com — http://www.securitytracker.com/id/1041477
• portal.msrc.microsoft.com — https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8253
• www.securityfocus.com — http://www.securityfocus.com/bid/105009