CVE-2023-38928Public exploitNetwork attack vector

Unauthenticated command execution via CGI password injection

Published Aug 7, 2023 · Updated Oct 11, 2024

Command injection in NETGEAR R7100LG firmware 1.0.0.78 allows remote attackers to execute commands through a crafted CGI password. The usb_remote_invite.cgi handler sends the password value to FUN_00077d70 and FUN_00077ea8, which use it as an externally controlled format string. Network reachability to the CGI endpoint is sufficient, and successful exploitation executes commands with the router service's privileges.

CVSS severity9.8
Critical
EPSS probability1.48%
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 NETGEAR R7100LG firmware 1.0.0.78 allows remote attackers to execute commands through a crafted CGI password. The usb_remote_invite.cgi handler sends the password value to FUN_00077d70 and FUN_00077ea8, which use it as an externally controlled format string. Network reachability to the CGI endpoint is sufficient, and successful exploitation executes commands with the router service's privileges.

The record

CVE
CVE-2023-38928
Published
Aug 7, 2023
Updated
Oct 11, 2024
Vendor
NETGEAR
Product
Nighthawk AC1900 4G LTE Modem Router (R7100LG)
Classifications
CWE-77, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 11, 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=1.0.0.78

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NETGEAR · Nighthawk AC1900 4G LTE Modem Router (R7100LG)version=1.0.0.78

Published CVSS scores

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1190Exploit Public-Facing Application

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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