---
title: "CVE-2026-117609: rtl_433 - Buffer Overflow"
description: "rtl_433 through 25.12 contains a stack-based buffer overflow caused by improper handling of more than seven valid Manchester-coded words in proflame2_mc(), letting nearby attackers hijack control flow via crafted OOK radio signals or signal files, exploit requires proximity to transmit crafted signals."
url: https://panop.io/threat-heartbeat/CVE-2026-117609/
---

# CVE-2026-117609 rtl\_433 - Buffer Overflow

rtl\_433 through 25.12 contains a stack-based buffer overflow caused by improper handling of more than seven valid Manchester-coded words in proflame2\_mc(), letting nearby attackers hijack control flow via crafted OOK radio signals or signal files, exploit requires proximity to transmit crafted signals.

CVSS base score 7.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.35% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-117609)

## Details

Type

Buffer Overflow

Impact

Remote Code Execution, Denial Of Service

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Published

28 October 2026

Updated

29 October 2026

Weakness

[CWE-121](https://cwe.mitre.org/data/definitions/121.html)

## Vendor fix

Update rtl\_433 to a version later than 25.12 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-117609](https://nvd.nist.gov/vuln/detail/CVE-2026-117609)
- [https://github.com/merbanan/rtl\_433/commit/f35183aaf1d2d905d422fd70bcae4eb7349d6186](https://github.com/merbanan/rtl_433/commit/f35183aaf1d2d905d422fd70bcae4eb7349d6186)
- [https://github.com/merbanan/rtl\_433/issues/3739](https://github.com/merbanan/rtl_433/issues/3739)
- [https://github.com/merbanan/rtl\_433/pull/3740](https://github.com/merbanan/rtl_433/pull/3740)
- [https://www.vulncheck.com/advisories/rtl-433-through-25.12-stack-based-buffer-overflow-via-proflame-2-decoder](https://www.vulncheck.com/advisories/rtl-433-through-25.12-stack-based-buffer-overflow-via-proflame-2-decoder)
- [https://github.com/merbanan/rtl\_433](https://github.com/merbanan/rtl_433)
- [https://github.com/merbanan/rtl\_433/blob/25.12/src/devices/proflame2.c#L46-L95](https://github.com/merbanan/rtl_433/blob/25.12/src/devices/proflame2.c#L46-L95)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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