---
title: "CVE-2026-92154: F´ (F Prime) - Data Tampering & Denial of Service"
description: "F´ (F Prime) < 4.2.0 contains a file integrity loss vulnerability caused by improper offset and size validation in Svc::FileUplink handleDataPacket, letting attackers write beyond declared upload size, exploit requires crafted file-uplink DATA packet."
url: https://panop.io/threat-heartbeat/CVE-2026-92154/
---

# CVE-2026-92154 F´ (F Prime) - Data Tampering & Denial of Service

F´ (F Prime) < 4.2.0 contains a file integrity loss vulnerability caused by improper offset and size validation in Svc::FileUplink handleDataPacket, letting attackers write beyond declared upload size, exploit requires crafted file-uplink DATA packet.

CVSS base score 8.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-92154)

## Details

Type

Data Tampering

Impact

Data Tampering, Denial Of Service

CVSS vector

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

Published

14 October 2026

Updated

15 October 2026

Weakness

[CWE-190](https://cwe.mitre.org/data/definitions/190.html)

## Vendor fix

Update to version 4.2.0 or later.

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-2026-92154](https://nvd.nist.gov/vuln/detail/CVE-2026-92154)
- [https://github.com/nasa/fprime/pull/4919](https://github.com/nasa/fprime/pull/4919)
- [https://github.com/nasa/fprime/security/advisories/GHSA-wx8q-q5gx-f54p](https://github.com/nasa/fprime/security/advisories/GHSA-wx8q-q5gx-f54p)
- [https://github.com/nasa/fprime/commit/cacdd555456bd83ab395b521d56c0330470ea798](https://github.com/nasa/fprime/commit/cacdd555456bd83ab395b521d56c0330470ea798)

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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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