CVE-2023-27852Public exploit

Code execution via oversized CGI JSON bodies

Published Mar 10, 2023 · Updated Feb 27, 2025

Buffer overflow in NETGEAR RAX30 firmware before 1.0.10.94 allows remote attackers on the local network to execute arbitrary code. The reset_pwd.cgi, tm_block.cgi, and rex_cgi handlers parse JSON request bodies beyond a 4,097-byte buffer boundary, causing an overflow and segmentation fault. Wi-Fi credentials or Ethernet access is required; two handlers need no administrator login, while reliable code execution requires chaining another flaw to overcome ASLR.

CVSS severity9.8
Critical
EPSS probability0.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
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

Buffer overflow in NETGEAR RAX30 firmware before 1.0.10.94 allows remote attackers on the local network to execute arbitrary code. The reset_pwd.cgi, tm_block.cgi, and rex_cgi handlers parse JSON request bodies beyond a 4,097-byte buffer boundary, causing an overflow and segmentation fault. Wi-Fi credentials or Ethernet access is required; two handlers need no administrator login, while reliable code execution requires chaining another flaw to overcome ASLR.

The record

CVE
CVE-2023-27852
Published
Mar 10, 2023
Updated
Feb 27, 2025
Vendor
NETGEAR
Product
RAX30
Classifications
CWE-120, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 27, 2025Record 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=prior to V1.0.10.94

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

NETGEAR · RAX30version=prior to V1.0.10.94

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS: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.

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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1210Exploitation of Remote Services

Public exploit references

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

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