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CVE-2021-34430

22
FAUCET Score

CVE-2021-34430 describes a weakness in Eclipse TinyDTLS through version 0.9-rc1, where its reliance on the C library's 'rand' function for key generation allows remote attackers to more easily compute the master key and decrypt DTLS traffic. This vulnerability carries a CVSS score of 7.5 (HIGH), indicating a network-based attack with low complexity that can lead to high confidentiality impact. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.8.2CPE matchmatch criteria
cpe:2.3:a:eclipse:tinydtls:*:*:*:*:*:*:*:*
0.9CPE matchmatch criteria
cpe:2.3:a:eclipse:tinydtls:0.9:rc1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.04%
Probability of exploitation in next 30 days
EPSS Percentile
60.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0104 is in the 37th percentile among its peer group of 51,506 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

bugs.eclipse.org / bugs/show_bug.cgi
ExploitIssue TrackingVendor Advisory