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CVE-2018-8253

20
FAUCET Score

CVE-2018-8253 is an elevation of privilege vulnerability in Microsoft Cortana that allows arbitrary website browsing from the lock screen, affecting Windows 10 and Windows Server 2016. It has a medium severity CVSS score of 4.6, indicating a physical attack vector with low complexity, potentially leading to high confidentiality impact without requiring user interaction. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion, though it received limited media coverage at the time of its disclosure.

Impacted Technologies

VendorProductVersion(s)CPE
1607CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

4.6MEDIUM

CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
0.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.78%
Probability of exploitation in next 30 days
EPSS Percentile
76.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0178 is in the 98th percentile among its peer group of 1,532 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Windows 10 Version 1607 for 32-bit Systems
View patch
microsoftpatch availablevia msrc
Product: Windows 10 Version 1607 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2016
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2016 (Server Core installation)
View patch

Vendor Advisories (1)

microsoft2018-Aug/CVE-2018-8253Important

Microsoft Cortana Elevation of Privilege Vulnerability

Aug 14, 2018

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2018-8253
PatchVendor Advisory
securityfocus.com / bid/105009
Third Party AdvisoryVDB Entry
securitytracker.com / id/1041477
Third Party AdvisoryVDB Entry