Security readout for executives and security teams
Plain-English summary
CVE-2021-35079 is a Qualcomm Snapdragon Telephony service permission-validation flaw. A third-party application may access a telephony API without proper validation. The source description says information disclosure, while the CVSS vector records high availability impact, so the exact impact needs vendor clarification.
Executive priority
Treat this as a moderate fleet hygiene issue, not an emergency based on current evidence. Prioritize asset identification and OEM patch tracking for Qualcomm-based mobile, IoT, and embedded devices.
Technical view
The issue affects multiple Qualcomm Snapdragon Compute, Connectivity, Consumer IoT, Industrial IoT, and Mobile chipsets. The published CVSS 3.1 score is 6.2 with local attack vector, low complexity, no privileges, no user interaction, unchanged scope, and high availability impact.
Likely exposure
Exposure is most likely in phones, connected devices, IoT systems, or embedded products built on listed Qualcomm components and allowing third-party applications or app-like code paths to interact with telephony services.
Exploitation context
The source bundle does not show CISA KEV listing or public active exploitation. The CVSS vector indicates local access, not remote network exploitation. No exploit details are provided in the cited sources.
Researcher notes
The public record has an impact inconsistency: the description says information disclosure, but the CVSS vector shows availability impact only. Do not assume exploitability beyond local third-party application context without vendor or OEM detail.
Mitigation direction
- Check Qualcomm’s May 2022 security bulletin and OEM advisories for applicable fixes.
- Inventory devices using the listed Snapdragon chipsets or modules.
- Apply OEM firmware or security updates when available for affected devices.
- Restrict untrusted third-party app installation on exposed device fleets.
- Prioritize managed mobile, IoT, and embedded devices with telephony capabilities.
Validation and detection
- Map device models to Qualcomm chipsets listed in CVE-2021-35079.
- Confirm installed firmware patch level against Qualcomm and OEM bulletins.
- Review mobile-device-management records for third-party app exposure.
- Check whether affected devices expose or use Telephony service APIs.
- Track exceptions where OEM patch availability is unclear.
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-2021-35079 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
- 6.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/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:N/UI:N/S:U/C:N/I:N/A:H2.53.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.2MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/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.