CVE-2021-42299

FAUCET Score

CVE-2021-42299 is a security feature bypass vulnerability affecting Microsoft Surface Pro 3 devices and their firmware. This medium-severity vulnerability (CVSS 6.1) allows an attacker with physical access to bypass security features, potentially leading to high integrity impacts and limited confidentiality impacts. While there is no known active exploitation, public exploit code, or KEV listing, the vulnerability has garnered some community discussion and media coverage.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		Range not provided by sourceCPE matchmatch criteria	cpe:2.3:o:microsoft:surface_pro_3_firmware:-:::::::*

CVSS Data

CVSS version used by this source: 3.1

5.6MEDIUM

CVSS:3.1/AV:P/AC:H/PR:L/UI:N/S:C/C:L/I:H/A:N

Attack Vector

PHYSICAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

HIGH

Availability Impact

NONE

Exploitability Score

0.4

Impact Score

4.7

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.73%

Probability of exploitation in next 30 days

EPSS Percentile

50.6%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0073 is in the 89th percentile among its peer group of 1,531 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 (1)

microsoftpatch availablevia nvd_reference

View patch

Vendor Advisories (1)

microsoft2021-Oct/CVE-2021-42299Important

Microsoft Surface Pro 3 Security Feature Bypass Vulnerability

Oct 12, 2021

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2021-42299

PatchVendor Advisory