CVE-2022-25597

Unauthenticated command execution via LPD metacharacters

Published Apr 7, 2022 · Updated Sep 16, 2024

OS command injection in the RT-AC86U LPD service on firmware 3.0.0.4.386.45956 allows remote attackers on the LAN to execute commands. The LPD request handler fails to filter shell metacharacters from user-controlled printer-service requests before command execution. Access requires local-network reachability to the LPD service; successful exploitation grants arbitrary command execution and can terminate the service.

CVSS severity8.8
High
EPSS probability0.85%
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 the RT-AC86U LPD service on firmware 3.0.0.4.386.45956 allows remote attackers on the LAN to execute commands. The LPD request handler fails to filter shell metacharacters from user-controlled printer-service requests before command execution. Access requires local-network reachability to the LPD service; successful exploitation grants arbitrary command execution and can terminate the service.

The record

CVE
CVE-2022-25597
Published
Apr 7, 2022
Updated
Sep 16, 2024
Vendor
ASUSTeK Computer Inc.
Product
RT-AC86U
Classifications
CWE-78, T1059
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 7, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record 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=3.0.0.4.386.45956

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

ASUSTeK Computer Inc. · RT-AC86Uversion=3.0.0.4.386.45956

Published CVSS scores

8.8TWCERT/CCCVSS:3.1/AV:A/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

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

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