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CVE-2026-21528

22
FAUCET Score

CVE-2026-21528 is a medium-severity vulnerability affecting Microsoft Azure IoT Explorer, allowing unauthorized information disclosure due to unrestricted IP address binding. This network-based attack requires no user interaction and has low attack complexity, potentially leading to limited confidentiality and integrity impacts. While not currently exploited in the wild and lacking public exploit code, it has garnered significant community discussion and media coverage, indicating awareness of its potential.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.15.13CPE matchmatch criteria
cpe:2.3:a:microsoft:azure_iot_explorer:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.51%
Probability of exploitation in next 30 days
EPSS Percentile
40.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0051 is in the 26th percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

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

Remediation

Patch Available

Vendor Patches (2)

microsoftpatch availablevia msrc
Product: Azure IoT ExplorerFixed in: 0.15.13
View patch
microsoftvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

microsoft2026-Feb/CVE-2026-21528Important

Azure IoT Explorer Information Disclosure Vulnerability

Feb 10, 2026

References

msrc.microsoft.com / update-guide/vulnerability/CVE-2026-21528
Vendor Advisory