Security readout for executives and security teams
Plain-English summary
CVE-2021-35097 is a Qualcomm Snapdragon authentication-bypass flaw tied to signature verification logic. In affected products, a physically present attacker may be able to bypass an authentication check, potentially exposing sensitive data or integrity protections. Business risk is highest for fleets containing Qualcomm-based mobile, IoT, automotive, compute, or connectivity devices.
Executive priority
Treat this as a targeted device-risk issue, not a broad remote emergency. Prioritize asset identification and vendor firmware tracking for Qualcomm-based systems that store sensitive data, support operations, or may be physically accessed outside controlled facilities.
Technical view
The issue is described as improper ordering of signature verification and hashing in a signature verification call. CVSS 3.1 score is 7.3 with physical attack vector, low complexity, no privileges, no user interaction, changed scope, high confidentiality and integrity impact, and no availability impact.
Likely exposure
Exposure is plausible where organizations operate devices or embedded products using the listed Qualcomm Snapdragon, QCA, QCM, QCS, SD, SM, WCD, or WCN components. Actual exposure depends on the exact chipset, firmware branch, OEM integration, and whether vendor guidance has been applied.
Exploitation context
The provided bundle does not show CISA KEV listing or any cited evidence of active exploitation. The CVSS vector requires physical access, which lowers internet-scale risk but matters for stolen devices, field equipment, labs, vehicles, and shared or unmanaged endpoints.
Researcher notes
The source bundle lacks CWE assignment, exploit details, and explicit remediation text beyond Qualcomm’s bulletin reference. Avoid assuming every listed chipset remains vulnerable in all devices; OEM firmware packaging and update adoption are decisive. No active exploitation should be claimed from the provided evidence.
Mitigation direction
- Inventory devices and embedded systems using affected Qualcomm components.
- Check Qualcomm’s August 2022 bulletin and OEM advisories for device-specific guidance.
- Apply OEM firmware or security updates when vendor guidance confirms relevance.
- Restrict physical access to affected or unpatched devices.
- Prioritize high-value mobile, IoT, automotive, and field-deployed assets.
Validation and detection
- Map hardware BOMs and device models to Qualcomm’s affected product list.
- Record firmware versions and OEM security patch levels for candidate devices.
- Confirm whether OEM guidance references CVE-2021-35097 or the August 2022 bulletin.
- Check vulnerability management records for affected Snapdragon-based assets.
- Document exceptions where vendor status or firmware lineage is unknown.
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.
Credential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-35097 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
- High
- CVSS
- 7.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:P/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:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N0.95.8Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.3HighVector: CVSS:3.1/AV:P/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/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.