Security readout for executives and security teams
Plain-English summary
CVE-2021-35108 is a Qualcomm Snapdragon hardware/firmware permission-checking flaw. If an attacker has physical access, affected devices may allow non-secure read and write access to protected resources, creating confidentiality, integrity, and availability risk.
Executive priority
Treat this as a moderate hardware-platform risk. It is not evidenced as remotely exploited, but affected mobile or connectivity devices with physical exposure should be inventoried and updated through OEM channels.
Technical view
The issue involves improper checking of the AP-S lock bit when verifying secure resource group permissions in listed Snapdragon Connectivity and Snapdragon Mobile components. CVSS 3.1 is 6.8 with physical attack vector, low complexity, no privileges, no user interaction, and high CIA impact.
Likely exposure
Exposure is likely limited to devices using the listed Qualcomm parts, including SD 8 Gen1 5G, SM7450, SM8475 variants, WCD937x/WCD938x, WCN6750/WCN685x/WCN7851, and WSA883x components. Actual risk depends on device model and OEM firmware status.
Exploitation context
The source bundle does not show CISA KEV listing or any cited active exploitation. The CVSS vector indicates physical access is required, so internet-scale remote exploitation is not supported by the provided evidence.
Researcher notes
Public detail is sparse. The provided sources identify the permission-checking flaw, affected Qualcomm products, CVSS vector, and vendor bulletin reference, but do not provide exploit details, proof of active exploitation, or standalone remediation instructions.
Mitigation direction
- Identify devices containing the listed Qualcomm Snapdragon chipsets or connectivity components.
- Check Qualcomm and OEM security bulletins for the August 2022 fix status.
- Apply vendor-provided firmware or security updates where available.
- Prioritize shared, field-deployed, or physically accessible devices.
- Escalate unsupported affected devices for replacement or compensating physical controls.
Validation and detection
- Map device inventory to chipset and component identifiers listed in the advisory.
- Verify OEM firmware build levels against vendor security bulletin guidance.
- Confirm whether affected models received August 2022 or later security updates.
- Review high-risk deployments where attackers may gain physical device access.
- Document unsupported devices and compensating controls for risk acceptance.
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-2021-35108 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
- 6.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H0.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.8MediumVector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.qualcomm.com/company/product-security/bulletins/august-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.