CVE-2023-27368

Unauthenticated code execution via SOAP header overflow

Published May 3, 2024 · Updated Aug 2, 2024

Stack-based buffer overflow in NETGEAR RAX30 firmware 1.0.9.90_3 allows network-adjacent attackers to execute arbitrary code. The soap_serverd binary copies attacker-controlled SOAP header data into a fixed-length stack buffer without first validating its length. Exploitation requires the WiFi password or an Ethernet connection to the router's network, but no router authentication, and yields code execution.

CVSS severity8.8
High
EPSS probability0.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in NETGEAR RAX30 firmware 1.0.9.90_3 allows network-adjacent attackers to execute arbitrary code. The soap_serverd binary copies attacker-controlled SOAP header data into a fixed-length stack buffer without first validating its length. Exploitation requires the WiFi password or an Ethernet connection to the router's network, but no router authentication, and yields code execution.

The record

CVE
CVE-2023-27368
Published
May 3, 2024
Updated
Aug 2, 2024
Vendor
NETGEAR
Product
RAX30
Classifications
CWE-787, CWE-121, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 3, 2024CVE 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?

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

  1. Affected versionversion=-
  2. Affected versionversion=1.0.9.90_3

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

NETGEAR · RAX30version=-; version=1.0.9.90_3

Published CVSS scores

8.8Zero Day InitiativeCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.8NIST National Vulnerability DatabaseCVSS:3.1/AV:A/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-121Stack-based Buffer Overflow
T1210Exploitation of Remote Services

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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