CVE-2022-25064Known exploitationPublic exploitNetwork attack vector

Unauthenticated command execution via crafted IPv6 address

Published Feb 25, 2022 · Updated Jul 9, 2026

OS command injection in TP-Link TL-WR840N(ES) firmware 6.20_180709 allows remote attackers to execute arbitrary commands. The /cgi?2&2 handler passes the X_TP_ExternalIPv6Address request value to oal_wan6_setIpAddr without neutralizing shell metacharacters. No authentication or user interaction is required, and successful injection runs attacker-supplied OS commands on the router.

CVSS severity9.8
Critical
EPSS probability36.47%
Next 30 days · Sep 16, 2026
Known exploitationReported
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 TP-Link TL-WR840N(ES) firmware 6.20_180709 allows remote attackers to execute arbitrary commands. The /cgi?2&2 handler passes the X_TP_ExternalIPv6Address request value to oal_wan6_setIpAddr without neutralizing shell metacharacters. No authentication or user interaction is required, and successful injection runs attacker-supplied OS commands on the router.

The record

CVE
CVE-2022-25064
Published
Feb 25, 2022
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 25, 2022CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

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 exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1190Exploit Public-Facing Application

Public exploit references

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

Reported exploitation

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