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CVE-2019-9750

23
FAUCET Score

CVE-2019-9750 describes a critical Distributed Denial of Service (DDoS) vulnerability in IoTivity versions up to 1.3.1, stemming from a mishandled "4.01 Unauthorized" CoAP server response. This flaw allows attackers to spoof source IP addresses and amplify UDP-based traffic by a factor of six, leading to significant denial of service. With a CVSS score of 9.1 (CRITICAL), the vulnerability is network-exploitable with low complexity and no user interaction, posing high impacts to integrity and availability. Despite its severity, there is no known active exploitation, publicly available exploit code, or significant community discussion, and the vendor has no plans to fix it due to migration to IoTivity Lite.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.3.1CPE matchmatch criteria
cpe:2.3:a:iotivity:iotivity:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.1CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.33%
Probability of exploitation in next 30 days
EPSS Percentile
68.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0133 is in the 55th percentile among its peer group of 36,835 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.

References

jira.iotivity.org / browse/IOT-3267
ExploitIssue TrackingThird Party Advisory