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CVE-2021-26444

21
FAUCET Score

CVE-2021-26444 is an information disclosure vulnerability affecting Microsoft Azure RTOS. With a CVSS score of 5.5 (Medium), it requires user interaction and local access to exploit, potentially leading to high confidentiality impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion, with only one article from BleepingComputer mentioning it as part of a larger patch Tuesday.

Impacted Technologies

VendorProductVersion(s)CPE
>= 6.0.0, < 6.1.9CPE match
cpe:2.3:a:microsoft:azure_real_time_operating_system:*:*:*:*:*:*:*:*
< 6.1.9CPE matchmatch criteria
cpe:2.3:o: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
1.21%
Probability of exploitation in next 30 days
EPSS Percentile
65.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0121 is in the 76th percentile among its peer group of 5,765 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 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-2021-26444Important

Azure RTOS Information Disclosure Vulnerability

Nov 9, 2021

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2021-26444
PatchVendor Advisory