Eclipse TinyDTLS through 0.9-rc1 relies on the rand function in the C library, which…
Priority LOW 35CWE-338Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-326.
Summary
Eclipse TinyDTLS through 0.9-rc1 relies on the rand function in the C library, which makes it easier for remote attackers to compute the master key and then decrypt DTLS traffic.
Why it matters now
EPSS 0.01045 64th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Eclipse Foundation | Eclipse TinyDTLS | up to 0.9-rc1 | — | No fix listed | CNA |
- Eclipse TinyDTLS VendorEclipse Foundation Affected up to 0.9-rc1 Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:eclipse:tinydtls:*:*:*:*:*:*:*:* | up to 0.8.2 | Vulnerable | Eclipse Foundation |
| cpe:2.3:a:eclipse:tinydtls:0.9:rc1:*:*:*:*:*:* | 0.9 rc1 | Vulnerable | Eclipse Foundation |
- cpe:2.3:a:eclipse:tinydtls:*:*:*:*:*:*:*:* Versions up to 0.8.2 Vulnerable ·Eclipse Foundation
- cpe:2.3:a:eclipse:tinydtls:0.9:rc1:*:*:*:*:*:* Versions 0.9 rc1 Vulnerable ·Eclipse Foundation
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-34430
- 2026-10-03 Alias added: GHSA-ffg3-3xwj-f92r
References
More Eclipse Foundation Tinydtls vulnerabilities
- TI-2017-04927 Eclipse tinydtls 0.8.2 for Eclipse IoT allows remote attackers to cause a denial of… CVSS 3.0HIGH 7.5
Sources
- CVE-2021-34430 · CVE Program
- CVE-2021-34430 · NVD
- FIRST EPSS
- GHSA-ffg3-3xwj-f92r · GitHub Advisory Database · CC BY 4.0
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