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CVE-2018-8531

35
FAUCET Score

CVE-2018-8531 is a remote code execution vulnerability in the Azure IoT Hub Device Client SDK when using the MQTT protocol, specifically due to memory corruption. This flaw impacts the Azure IoT Edge and the C# Software Development Kit. With a CVSS score of 8.8 (High), it poses a significant risk, allowing unauthenticated attackers to achieve full compromise (confidentiality, integrity, availability) with low attack complexity, though user interaction is required. There is no evidence of active exploitation, nor are public exploits like Metasploit or ExploitDB available, and community discussion and media coverage have been minimal.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:microsoft:azure_internet_of_things_edge:-:*:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:microsoft:csharp_software_development_kit:*:*:*:*:*:azure_internet_of_things:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
15.19%
Probability of exploitation in next 30 days
EPSS Percentile
96.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.1519 is in the 96th percentile among its peer group of 14,848 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 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Hub Device Client SDK for Azure IoT
View patch
microsoftpatch availablevia msrc
Product: Azure IoT Edge
View patch

Vendor Advisories (1)

microsoft2018-Oct/CVE-2018-8531Important

Azure IoT Device Client SDK Memory Corruption Vulnerability

Oct 9, 2018

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2018-8531
PatchVendor Advisory
securityfocus.com / bid/105472
Third Party AdvisoryVDB Entry