CVE-2026-40029

Command execution via shell-expanded LNK path

Published Apr 8, 2026 · Updated Apr 8, 2026

OS command injection in Khyrenz Ltd parseUSBs before 1.9 allows attackers to execute commands through a crafted LNK filename. In parseUSBs.py, the LNK parser path was concatenated into an os.popen shell command, allowing filename metacharacters to introduce additional commands. Exploitation requires a forensic examiner to process a mounted volume containing the crafted file, and injected commands run with the examiner's privileges.

CVSS severity8.5
High
EPSS probability0.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Khyrenz Ltd parseUSBs before 1.9 allows attackers to execute commands through a crafted LNK filename. In parseUSBs.py, the LNK parser path was concatenated into an os.popen shell command, allowing filename metacharacters to introduce additional commands. Exploitation requires a forensic examiner to process a mounted volume containing the crafted file, and injected commands run with the examiner's privileges.

The record

CVE
CVE-2026-40029
Published
Apr 8, 2026
Updated
Apr 8, 2026
Vendor
Khyrenz Ltd
Product
parseUSBs
Classifications
CWE-78, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Khyrenz Ltd · parseUSBsversion=0 <1.9

Published CVSS scores

8.5VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8VulnCheckCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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