CVE-2021-38441
Eclipse CycloneDDS Write-what-where Condition
Eclipse CycloneDDS versions prior to 0.8.0 are vulnerable to a write-what-where condition, which may allow an attacker to write arbitrary values in the XML parser.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Eclipse CycloneDDS Write-what-where Condition
Eclipse CycloneDDS versions prior to 0.8.0 are vulnerable to a write-what-where condition, which may allow an attacker to write arbitrary values in the XML parser.
- Record
CVE-2021-38441- CVSS 3.1
- 6.6 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H - Weakness
- CWE-123
- Updated
- 2026-11-02
EUVDEUVD-2021-24893
Eclipse CycloneDDS versions prior to 0.8.0 are vulnerable to a write-what-where condition, which may allow an attacker to write arbitrary values in the XML parser.
- Record
EUVD-2021-24893- CVSS 3.1
- 6.6 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-9v3v-pqhw-3fhr
Eclipse CycloneDDS versions prior to 0.8.0 are vulnerable to a write-what-where condition, which...
Eclipse CycloneDDS versions prior to 0.8.0 are vulnerable to a write-what-where condition, which may allow an attacker to write arbitrary values in the XML parser.
- Record
GHSA-9v3v-pqhw-3fhr- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-123
- Updated
- 2026-11-02
NVD
Eclipse CycloneDDS versions prior to 0.8.0 are vulnerable to a write-what-where condition, which may allow an attacker to write arbitrary values in the XML parser.
- Record
CVE-2021-38441- CVSS 3.1
- 6.6 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-123
- Updated
- 2026-11-02
OSV
Eclipse CycloneDDS versions prior to 0.8.0 are vulnerable to a write-what-where condition, which may allow an attacker to write arbitrary values in the XML parser.
- Record
CVE-2021-38441- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2021-38441
Eclipse CycloneDDS versions prior to 0.8.0 are vulnerable to a write-what-where condition, which may allow an attacker to write arbitrary values in the XML parser.
- Record
DEBIAN-CVE-2021-38441- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-38441
Eclipse CycloneDDS versions prior to 0.8.0 are vulnerable to a write-what-where condition, which may allow an attacker to write arbitrary values in the XML parser.
- Record
UBUNTU-CVE-2021-38441- CVSS 3.1
- 6.6 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
cycloneddsDebian:12 |
before 0.8.1-2 | 0.8.1-2 |
cycloneddsDebian:13 |
before 0.8.1-2 | 0.8.1-2 |
cycloneddsDebian:14 |
before 0.8.1-2 | 0.8.1-2 |
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 |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-38441 is a medium vulnerability (CVSS 6.6) in Eclipse Cyclonedds, published May 5, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.15%, the 82nd percentile. Fixed in cyclonedds 0.8.1-2.