Security readout for executives and security teams
This flaw can cause a Zephyr-based Bluetooth device to hit a divide-by-zero condition when processing an invalid CONNECT_IND interval. The documented impact is limited availability loss, not data theft or code execution. It matters most for products using Zephyr Bluetooth in environments where nearby attackers can send Bluetooth traffic. Exposure is likely limited to embedded, IoT, or product firmware using affected Zephyr RTOS Bluetooth functionality. Systems without Zephyr, without Bluetooth enabled, or not reachable over adjacent Bluetooth range are not indicated as exposed by the sources. Treat this as a targeted availability risk for Bluetooth-enabled Zephyr products, not an enterprise-wide emergency. Prioritize asset identification and vendor firmware status, especially for customer-facing, safety-relevant, or difficult-to-service devices. Mitigation focus: Inventory products and firmware that include Zephyr RTOS Bluetooth components.; Check Zephyr’s advisory for the authoritative fixed version or mitigation guidance.; Update affected firmware when a vendor-supported fix is available..
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
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ATT&CK lookup starting points
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CWE-369: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-3432 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CNA and ADP enrichment extracted from CVE v5
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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:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.3MediumVector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source materials
- CVE List V5 sourceCVE List V5
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.
Divide By Zero
Divide By Zero represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.