Security readout for executives and security teams
Plain-English summary
CVE-2021-35085 is a Qualcomm Snapdragon flaw where management frame receive handling may overrun a buffer. The documented impact is denial of service, not data theft or code execution. Business urgency is moderate because exploitation requires local low-privileged access, but affected Snapdragon components appear across mobile, compute, automotive, connectivity, and IoT products.
Executive priority
Handle through normal vulnerability management, with priority raised for safety, uptime, or fleet-managed environments. The main business risk is device disruption, not confirmed compromise or data exposure, and remediation depends heavily on OEM firmware availability.
Technical view
The CVE describes a possible buffer overflow caused by missing buffer length checks during management frame Rx handling. CVSS 3.1 is 5.5 with AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H, indicating local low-privileged exploitation and high availability impact only. The source bundle does not provide CWE, fixed firmware versions, or exploit details.
Likely exposure
Exposure is likely in devices using the listed Qualcomm Snapdragon, QCA, WCN, SDX, SA, and related components. Real exposure depends on exact hardware, firmware lineage, and whether the device OEM or vendor delivered Qualcomm's May 2022 security bulletin fixes.
Exploitation context
The bundle does not show CISA KEV listing or any cited active exploitation. The CVSS vector indicates local access with low privileges, no user interaction, and availability-only impact. Treat exploit status as unconfirmed based on the provided evidence.
Researcher notes
Evidence is limited to the CVE record, CVE List entry, and Qualcomm bulletin reference. No exploit code, active exploitation, CWE, or fixed version detail is provided in the bundle. Validation should focus on asset matching and vendor firmware provenance.
Mitigation direction
- Inventory devices using listed Qualcomm Snapdragon and connectivity components.
- Check Qualcomm and OEM guidance for CVE-2021-35085 update availability.
- Apply vendor firmware or security updates that include the May 2022 Qualcomm bulletin fixes.
- Prioritize availability-sensitive mobile, automotive, compute, and IoT deployments.
- Limit untrusted local access on affected devices until patched.
Validation and detection
- Map hardware identifiers against the affected component list in the CVE bundle.
- Confirm OEM firmware release notes reference CVE-2021-35085 or Qualcomm May 2022 fixes.
- Verify deployed firmware or security patch levels after remediation.
- Document devices where vendor fix status is unavailable or unsupported.
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-2021-35085 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
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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:L/UI:N/S:U/C:N/I:N/A:H1.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.qualcomm.com/company/product-security/bulletins/may-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.