Security readout for executives and security teams
Plain-English summary
This Qualcomm Snapdragon issue could weaken key generation when PRNG output is read without proper buffer validation. For affected devices, that can threaten confidentiality and integrity of security functions that depend on strong keys. The source rates it critical, but the bundle does not show active exploitation or name fixed versions.
Executive priority
Treat this as a high-priority supply-chain firmware issue. The business risk is strongest where affected Qualcomm-based devices handle authentication, encrypted communications, or sensitive operational data. Prioritize inventory and OEM patch confirmation before assuming exposure is resolved.
Technical view
CVE-2021-30339 affects multiple Qualcomm Snapdragon connectivity, mobile, wearable, industrial IoT, wired infrastructure, networking, audio, and Wi-Fi components. CVSS 3.1 is 9.0 with local attack vector, low complexity, no privileges, no user interaction, changed scope, and high confidentiality and integrity impact.
Likely exposure
Exposure is limited to products containing the listed Qualcomm parts, including Snapdragon mobile platforms and WCN/QCA/WCD/WSA components. Organizations may encounter it through phones, embedded systems, IoT, wearables, or network equipment supplied by OEMs.
Exploitation context
The source bundle does not identify known exploitation, and KEV status is false. The CVSS vector indicates local access is required, but no privileges or user interaction are needed. Public sources provided do not include exploit details, affected firmware versions, or fixed build identifiers.
Researcher notes
Evidence is incomplete. The bundle provides affected component names, a Qualcomm bulletin reference, and CVSS data, but no CWE, root-cause depth, fixed versions, exploitability write-up, or patch matrix. Avoid asserting exploitability beyond local, unauthenticated, no-interaction conditions from the CVSS vector.
Mitigation direction
- Identify devices using the listed Qualcomm Snapdragon, QCA, WCN, WCD, or WSA components.
- Check Qualcomm's April 2022 bulletin and the relevant OEM advisory for available firmware updates.
- Apply OEM firmware or platform security updates when available for affected models.
- Prioritize devices protecting sensitive communications, credentials, or regulated data.
- Monitor Qualcomm and OEM security bulletins for clarified fixed versions or compensating guidance.
Validation and detection
- Map hardware inventory and SBOM data against the affected component list.
- Confirm device firmware or security patch levels against Qualcomm and OEM advisories.
- Review mobile, IoT, and network equipment procurement records for listed Qualcomm parts.
- Track exceptions where OEMs have not published patched firmware or status.
- Document whether each affected asset is patched, unsupported, or awaiting vendor guidance.
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-2021-30339 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
- Critical
- CVSS
- 9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N2.55.8Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9CriticalVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.qualcomm.com/company/product-security/bulletins/april-2022-bulletinCVE 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.