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CVE-2021-42323

17
FAUCET Score

CVE-2021-42323 is an information disclosure vulnerability affecting Microsoft Azure RTOS. With a CVSS score of 3.3 (LOW), it requires local access and user interaction to exploit, potentially leading to limited information disclosure. There is no known public exploit code available, nor is it listed in CISA's KEV catalog, indicating it is not actively exploited. Community discussion and media coverage are minimal, suggesting low current attention.

Impacted Technologies

VendorProductVersion(s)CPE
< 6.1.9CPE matchmatch criteria
cpe:2.3:o:microsoft:azure_real_time_operating_system:*:*:*:*:*:*:*:*
>= 6.0.0, < 6.1.9CPE match
cpe:2.3:a:microsoft:azure_real_time_operating_system:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

3.3LOW

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.8
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.19%
Probability of exploitation in next 30 days
EPSS Percentile
64.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0119 is in the 73rd percentile among its peer group of 577 CVEs.

Social Chatter

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

Media Mentions

The average CVE in this peer group has 0.1 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 Real Time Operating SystemFixed in: 6.1.9

Vendor Advisories (1)

microsoft2021-Nov/CVE-2021-42323Important

Azure RTOS Information Disclosure Vulnerability

Nov 9, 2021

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2021-42323
PatchVendor Advisory