Security readout for executives and security teams
Plain-English summary
CVE-2021-31664 is a reported buffer overflow in RIOT-OS 2021.01 before commit 44741ff99f7a71df45420635b238b9c22093647a. The stated impact is possible disclosure of sensitive information. The public bundle does not provide CVSS scoring, affected device models, or operational exploit details.
Executive priority
Prioritize inventory and vendor confirmation rather than emergency response unless RIOT-OS 2021.01 is present in business-critical or externally exposed devices. Severity is not scored in the provided sources, so business urgency depends on confirmed deployment and device role.
Technical view
The CVE record describes a buffer overflow in RIOT-OS 2021.01 before a specific upstream commit. Available sources identify sensitive information disclosure as the impact, but do not specify the vulnerable component, attack preconditions, CWE, CVSS vector, or exploit method.
Likely exposure
Exposure is most likely in embedded, IoT, or firmware projects that directly include RIOT-OS 2021.01 code before the referenced commit. The bundle does not identify downstream vendors, packaged products, CPEs, or exact version ranges beyond that RIOT-OS commit boundary.
Exploitation context
The source bundle does not show CISA KEV inclusion and provides no evidence of active exploitation. Public references are the CVE record, CVE JSON, a RIOT-OS pull request, and the fixing commit reference.
Researcher notes
Evidence is sparse. The CVE states buffer overflow and information disclosure, but the bundle does not include CVSS, CWE, attack vector, exploitability, or detailed affected component data. Analysis should remain tied to the RIOT-OS 2021.01 pre-commit boundary.
Mitigation direction
- Inventory products and firmware that include RIOT-OS 2021.01.
- Update RIOT-OS code to include commit 44741ff99f7a71df45420635b238b9c22093647a or later.
- For vendor-managed devices, request firmware status and remediation guidance from the vendor.
- Treat unpatchable affected devices as higher risk until vendor guidance is available.
Validation and detection
- Check SBOMs, build manifests, and firmware source for RIOT-OS 2021.01.
- Compare embedded RIOT-OS source against commit 44741ff99f7a71df45420635b238b9c22093647a.
- Review vendor advisories for downstream products using RIOT-OS.
- Confirm remediation by verifying the fixed commit is present in deployed firmware.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-31664 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/RIOT-OS/RIOT/pull/15345CVE reference · x_refsource_MISC
- https://github.com/RIOT-OS/RIOT/commit/44741ff99f7a71df45420635b238b9c22093647aCVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.