PatchTheCVECVE-2021-33889: OpenThread wpantund through 2021-07-02 has a stack-based Buffer Overflow because of an inconsistency in the in
CVE-2021-33889 is a medium-severity flaw (CVSS 6.8) affecting wpantund. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
OpenThread wpantund through 2021-07-02 has a stack-based Buffer Overflow because of an inconsistency in the integer data type for metric_len.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.8 (Medium) |
| Attack vector | Physical |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 74%) |
| CISA exploited list | No |
| Weakness | CWE-787 |
| Published | 2021-07-02 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-33889?
wpantund: upgrade to newer than 2021-07-02. Exact commands for each OS are on this page.
Is CVE-2021-33889 being exploited?
CVE-2021-33889 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-33889 affect?
CVE-2021-33889 affects wpantund. Severity is medium (CVSS 6.8). OpenThread wpantund through 2021-07-02 has a stack-based Buffer Overflow because of an inconsistency in the integer data type for metric_len.
How urgent is CVE-2021-33889?
Priority 30/100. No elevated risk signals yet.
Related CVEs
- CVE-2020-8916 MEDIUM 5.0 UPGRADE A memory leak in Openthread's wpantund versions up to commit 0e5d1601febb869f583e944785e5685c6c747be7, when us