CVE-2022-42496Public exploitNetwork attack vector

Remote command execution via crafted filename

Published Dec 5, 2022 · Updated Apr 24, 2025

OS command injection in kujirahand Nako3edit 3.3.74 and earlier allows remote attackers to execute arbitrary commands via the file parameter. The editor accepts shell metacharacters in the filename and passes the value to OS command execution without neutralizing them. The request requires an appkey, but the upstream issue states that the short key was susceptible to brute-force discovery; commands run with the editor process's privileges.

CVSS severity9.8
Critical
EPSS probability2.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

OS command injection in kujirahand Nako3edit 3.3.74 and earlier allows remote attackers to execute arbitrary commands via the file parameter. The editor accepts shell metacharacters in the filename and passes the value to OS command execution without neutralizing them. The request requires an appkey, but the upstream issue states that the short key was susceptible to brute-force discovery; commands run with the editor process's privileges.

The record

CVE
CVE-2022-42496
Published
Dec 5, 2022
Updated
Apr 24, 2025
Vendor
kujirahand
Product
Nako3edit
Classifications
CWE-78, CAPEC-88, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 5, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=v3.3.74 and earlier

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

kujirahand · Nako3editversion=v3.3.74 and earlier

Published CVSS scores

9.8GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.8JPCERT/CC and IPAAV:N/AC:M/Au:N/C:P/I:P/A:P
8.1JPCERT/CC and IPACVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CAPEC-88OS Command Injection
T1059Command and Scripting Interpreter

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo