CVE-2022-1262Public exploitNetwork attack vector

Root command execution via unneutralized client secret

Published Apr 11, 2022 · Updated Aug 2, 2024

Command injection in D-Link router firmware allows remote authenticated users to execute arbitrary shell commands as root through the CLI. The /bin/protest binary incorporates the -client_secret value supplied through the telnet-accessible /bin/cli interface without neutralizing shell separators. Exploitation requires administrator-derived telnet credentials and, on the demonstrated DIR-2640 setup, telnet enabled through a modified configuration; successful injection grants root control.

CVSS severity7.8
High
EPSS probability2.21%
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 D-Link router firmware allows remote authenticated users to execute arbitrary shell commands as root through the CLI. The /bin/protest binary incorporates the -client_secret value supplied through the telnet-accessible /bin/cli interface without neutralizing shell separators. Exploitation requires administrator-derived telnet credentials and, on the demonstrated DIR-2640 setup, telnet enabled through a modified configuration; successful injection grants root control.

The record

CVE
CVE-2022-1262
Published
Apr 11, 2022
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 11, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.2NIST National Vulnerability DatabaseAV:L/AC:L/Au:N/C:C/I:C/A:C
7.8NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell

Public exploit references

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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