CVE-2022-40740Network attack vector

Administrator command execution via unfiltered authentication field

Published Jan 3, 2023 · Updated Apr 10, 2025

Command injection in Realtek GPON router SDK 1.9 allows remote authenticated users to execute arbitrary system commands through its web interface. The authentication field accepts the && separator, concatenates attacker-controlled commands, and neither validates field format nor filters illegal characters. Administrator access is required; exploitation permits credential-file destruction, arbitrary device manipulation, and service interruption.

CVSS severity7.2
High
EPSS probability1.47%
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 Realtek GPON router SDK 1.9 allows remote authenticated users to execute arbitrary system commands through its web interface. The authentication field accepts the && separator, concatenates attacker-controlled commands, and neither validates field format nor filters illegal characters. Administrator access is required; exploitation permits credential-file destruction, arbitrary device manipulation, and service interruption.

The record

CVE
CVE-2022-40740
Published
Jan 3, 2023
Updated
Apr 10, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, CWE-20, T1059
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 3, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 10, 2025Record 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 privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.2TWCERT/CCCVSS:3.1/AV:N/AC:L/PR:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-20Improper Input Validation
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

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Your stack

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