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CVE-2021-26429

24
FAUCET Score

CVE-2021-26429 is an Elevation of Privilege vulnerability affecting Microsoft Azure Sphere. It carries a CVSS score of 7.8 (High), indicating a local attack with low complexity that could lead to high impact on confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code, the vulnerability has received some community discussion and media coverage, suggesting it is a known issue within the cybersecurity landscape.

Impacted Technologies

VendorProductVersion(s)CPE
>= 20.00, < 21.07CPE match
cpe:2.3:a:microsoft:azure_sphere:*:*:*:*:*:*:*:*
< 21.07CPE matchmatch criteria
cpe:2.3:a:microsoft:azure_sphere:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.7HIGH

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

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
LOW
Exploitability Score
1.1
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.48%
Probability of exploitation in next 30 days
EPSS Percentile
38.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0048 is in the 79th percentile among its peer group of 17,070 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Azure SphereFixed in: 21.07

Vendor Advisories (1)

microsoft2021-Aug/CVE-2021-26429Important

Azure Sphere Elevation of Privilege Vulnerability

Aug 10, 2021

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2021-26429
PatchVendor Advisory