CVE-2026-4529Public exploitNetwork attack vector

Authenticated HTTP-service crash via unbounded SOAP copy

Published Mar 21, 2026 · Updated Mar 21, 2026

Stack-based buffer overflow in the SOAP handler in D-Link DHP-1320 1.00WWB04 allows remote authenticated users to crash the HTTP service. The redirect_count_down_page function uses unbounded sprintf and strcpy calls to place SOAP-controlled data and NVRAM values into a fixed 1,024-byte stack buffer. A valid HNAP1 SOAP action, a negative Content-Length value, and an oversized request body are required; the published proof of concept demonstrates immediate process termination.

CVSS severity8.8
High
EPSS probability0.65%
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 the SOAP handler in D-Link DHP-1320 1.00WWB04 allows remote authenticated users to crash the HTTP service. The redirect_count_down_page function uses unbounded sprintf and strcpy calls to place SOAP-controlled data and NVRAM values into a fixed 1,024-byte stack buffer. A valid HNAP1 SOAP action, a negative Content-Length value, and an oversized request body are required; the published proof of concept demonstrates immediate process termination.

The record

CVE
CVE-2026-4529
Published
Mar 21, 2026
Updated
Mar 21, 2026
Vendor
D-Link
Product
DHP-1320
Classifications
CWE-121, CWE-119, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 21, 2026Record 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=1.00WWB04

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

D-Link · DHP-1320version=1.00WWB04

Published CVSS scores

7.4VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C
8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1499.004Application or System Exploitation

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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