CVE-2020-18734
A stack buffer overflow in /ddsi/q_bitset.h of Eclipse IOT Cyclone DDS Project v0.1.0 causes the...
A stack buffer overflow in /ddsi/q_bitset.h of Eclipse IOT Cyclone DDS Project v0.1.0 causes the DDS subscriber server to crash.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
A stack buffer overflow in /ddsi/q_bitset.h of Eclipse IOT Cyclone DDS Project v0.1.0 causes the DDS subscriber server to crash.
- Record
CVE-2020-18734- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-787
- Updated
- 2026-11-02
CVE List No score
A stack buffer overflow in /ddsi/q_bitset.h of Eclipse IOT Cyclone DDS Project v0.1.0 causes the DDS subscriber server to crash.
- Record
CVE-2020-18734- Updated
- 2026-11-02
EUVDEUVD-2020-10651 No score
A stack buffer overflow in /ddsi/q_bitset.h of Eclipse IOT Cyclone DDS Project v0.1.0 causes the DDS subscriber server to crash.
- Record
EUVD-2020-10651- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-276f-9fcq-7wmm No score
A stack buffer overflow in /ddsi/q_bitset.h of Eclipse IOT Cyclone DDS Project v0.1.0 causes the...
A stack buffer overflow in /ddsi/q_bitset.h of Eclipse IOT Cyclone DDS Project v0.1.0 causes the DDS subscriber server to crash.
- Record
GHSA-276f-9fcq-7wmm- Weakness
- CWE-787
- Updated
- 2026-11-02
OSV
A stack buffer overflow in /ddsi/q_bitset.h of Eclipse IOT Cyclone DDS Project v0.1.0 causes the DDS subscriber server to crash.
- Record
CVE-2020-18734- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2020-18734
A stack buffer overflow in /ddsi/q_bitset.h of Eclipse IOT Cyclone DDS Project v0.1.0 causes the DDS subscriber server to crash.
- Record
UBUNTU-CVE-2020-18734- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
cycloneddsUbuntu:22.04:LTS |
All versions, plus listed versions 0.7.0-70.8.1-40.8.1-4build10.8.1-50.8.2-10.8.2-40.8.2-5 |
None known |
cycloneddsUbuntu:24.04:LTS |
All versions, plus listed versions 0.10.3-20.10.4-10.10.4-1.10.10.4-1.1build10.10.4-1.1build20.10.4-1.1build3 |
None known |
cycloneddsUbuntu:25.10 |
All versions, plus listed versions 0.10.5-1 |
None known |
cycloneddsUbuntu:26.10 |
All versions, plus listed versions 0.10.5-1build10.10.5-1build2 |
None known |
cycloneddsUbuntu:26.04:LTS |
All versions, plus listed versions 0.10.5-10.10.5-1build1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-18734 is a high vulnerability (CVSS 7.5) in Eclipse Cyclone Data Distribution Service, published August 23, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.86%, the 79th percentile. No source names a fixed version.