CVE-2022-27004

Unauthenticated command execution via remote6in4 injection

Published Mar 15, 2022 · Updated Sep 12, 2024

Command injection in affected TOTOLINK X5000R and A7000R firmware allows attackers to execute arbitrary commands through a crafted request. The Tunnel 6in4 handler passes the unneutralized remote6in4 parameter into an operating-system command. The request requires no authentication but must originate from an adjacent network; successful exploitation grants command execution on the router.

CVSS severity9.8
Critical
EPSS probability2.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in affected TOTOLINK X5000R and A7000R firmware allows attackers to execute arbitrary commands through a crafted request. The Tunnel 6in4 handler passes the unneutralized remote6in4 parameter into an operating-system command. The request requires no authentication but must originate from an adjacent network; successful exploitation grants command execution on the router.

The record

CVE
CVE-2022-27004
Published
Mar 15, 2022
Updated
Sep 12, 2024
Vendor
TOTOLINK
Product
A7000R Firmware
Classifications
CWE-78, T1059.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 15, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 12, 2024Record 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=9.1.0u.6115_b20201022

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

TOTOLINK · A7000R Firmwareversion=9.1.0u.6115_b20201022
TOTOLINK · TOTOLINK X5000R Firmwareversion=9.1.0u.6118_b20201102

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
8.8CISA-ADPCVSS:3.1/AV:A/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.

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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')
T1059.004Command and Scripting Interpreter: Unix Shell

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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