---
title: "CVE-2026-116776: USB Test - Buffer Overflow"
description: "USB Test < 1.1.5 contains a heap buffer overflow caused by trusting DISK_GEOMETRY.BytesPerSector without validation in getSectorSize(), letting physically connected malicious USB devices cause denial of service or arbitrary code execution, exploit requires physical USB device connection."
url: https://panop.io/threat-heartbeat/CVE-2026-116776/
---

# CVE-2026-116776 USB Test - Buffer Overflow

USB Test < 1.1.5 contains a heap buffer overflow caused by trusting DISK\_GEOMETRY.BytesPerSector without validation in getSectorSize(), letting physically connected malicious USB devices cause denial of service or arbitrary code execution, exploit requires physical USB device connection.

CVSS base score 7.0 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-116776)

## Details

Type

Buffer Overflow

Impact

Remote Code Execution, Denial Of Service

CVSS vector

CVSS:4.0/AV:P/AC:L/AT:N/PR:H/UI:P/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

28 October 2026

Updated

29 October 2026

Weakness

[CWE-122](https://cwe.mitre.org/data/definitions/122.html)

## Vendor fix

Update to version 1.1.5 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-2026-116776](https://nvd.nist.gov/vuln/detail/CVE-2026-116776)
- [https://github.com/n-romanovich/usb-test/commit/5b6caac844461024520b02337d3a541fbe128f89](https://github.com/n-romanovich/usb-test/commit/5b6caac844461024520b02337d3a541fbe128f89)
- [https://github.com/n-romanovich/usb-test/releases/tag/release-v1.1.5](https://github.com/n-romanovich/usb-test/releases/tag/release-v1.1.5)
- [https://github.com/n-romanovich/usb-test/security/advisories/GHSA-cfrv-c9q2-7cr3](https://github.com/n-romanovich/usb-test/security/advisories/GHSA-cfrv-c9q2-7cr3)

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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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