CVE-2023-29916Network attack vector

Service interruption via UpdateWanParams stack overflow

Published Apr 21, 2023 · Updated Feb 5, 2025

Stack-based buffer overflow in H3C Magic R200 firmware R200V100R004 allows remote authenticated users to interrupt service. The UpdateWanParams handler at /goform/aspForm mishandles request data until its stack buffer overflows, but the public report does not identify the triggering field or copy operation. Administrative access to the network interface is required, and the published impact is limited to service interruption rather than data disclosure or modification.

CVSS severity4.9
Medium
EPSS probability0.79%
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 H3C Magic R200 firmware R200V100R004 allows remote authenticated users to interrupt service. The UpdateWanParams handler at /goform/aspForm mishandles request data until its stack buffer overflows, but the public report does not identify the triggering field or copy operation. Administrative access to the network interface is required, and the published impact is limited to service interruption rather than data disclosure or modification.

The record

CVE
CVE-2023-29916
Published
Apr 21, 2023
Updated
Feb 5, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1499.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 21, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 5, 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

4.9NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
4.9CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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