CVE-2023-33630Public exploitNetwork attack vector

Root code execution via EditvsList stack overflow

Published May 31, 2023 · Updated Jan 16, 2025

Stack overflow in H3C Magic R300 firmware R300-2100MV100R004 allows remote authenticated users to crash its management web process. The EditvsList handler passes the param value to getElement, which accepts up to 64 bytes, then stores the result in a 20-byte local buffer. Administrator access to the router web interface is required; a crafted POST crashes the service, and the disclosure states that a custom exploit grants a root shell.

CVSS severity7.2
High
EPSS probability0.93%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack overflow in H3C Magic R300 firmware R300-2100MV100R004 allows remote authenticated users to crash its management web process. The EditvsList handler passes the param value to getElement, which accepts up to 64 bytes, then stores the result in a 20-byte local buffer. Administrator access to the router web interface is required; a crafted POST crashes the service, and the disclosure states that a custom exploit grants a root shell.

The record

CVE
CVE-2023-33630
Published
May 31, 2023
Updated
Jan 16, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1190
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 31, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 16, 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

7.2CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
7.2NVDCVSS: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.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
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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