CVE-2026-116776

7.0 HIGH 0.2% exploit odds Fix listed Memory safety

What it is

USB Test is a lightweight Windows CLI utility for verifying sector integrity and detecting overreported capacity on USB flash drives. Prior to version 1.1.5, getSectorSize() in USB Test/src/driveinfo.cpp trusts DISK_GEOMETRY.BytesPerSector returned by IOCTL_DISK_GET_DRIVE_GEOMETRY without checking whether the call succeeded or enforcing size bounds. USB Test/src/drivetest.cpp uses the value for division and to size a heap buffer before memcpy(buffer.data(), &sector, 8), so a physically connected malicious USB storage device can report a value below eight bytes and cause repeated out-of-bounds writes, or report zero and cause a divide-by-zero denial of service when a user starts a drive test. The heap corruption can crash the elevated application and may permit arbitrary code execution. This issue is fixed in version 1.1.5.

At a glance

Exploitability: Can be exploited with physical access with an admin-level account, but needs a user to act. High risk of data tampering, service disruption.
Exploit odds: 0.2% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-10-26 21:53 UTC ReservedThe CVE id was reserved by its CNA
2026-10-28 16:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-11-04 23:10 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.2% in the next 30 days (EPSS).
Severity: 7.0 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2026-10-28 16:17 UTC
Last modified: 2026-11-04 23:10 UTC
Exploit probability: 0.2% · EPSS, next 30 days
Weakness: CWE-122
Record status: Awaiting Analysis

Attack profile CVSS 4.0 · 7.0

Attack vector: Physical
Complexity: Low
Attack requirements: None
Privileges needed: High
User interaction: Passive
Confidentiality: None
Integrity: High
Availability: High

Raw 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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-116776.md and follow it. Check whether this project is affected by CVE-2026-116776. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record