CVE-2025-4544Public exploitNetwork attack vector

Authenticated service crash via unbounded sprintf copy

Published May 11, 2025 · Updated May 12, 2025

Stack-based buffer overflow in D-Link DI-8100 16.07.26A1 allows remote authenticated users to crash jhttpd via crafted HTTP parameters. The ddos_asp handler copies attacker-controlled def_* values into a stack-local buffer with sprintf and no length bound. Administrative session access to /ddos.asp is required; the demonstrated consequence is a service crash, while command execution is unverified.

CVSS severity7.2
High
EPSS probability10.90%
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 D-Link DI-8100 16.07.26A1 allows remote authenticated users to crash jhttpd via crafted HTTP parameters. The ddos_asp handler copies attacker-controlled def_* values into a stack-local buffer with sprintf and no length bound. Administrative session access to /ddos.asp is required; the demonstrated consequence is a service crash, while command execution is unverified.

The record

CVE
CVE-2025-4544
Published
May 11, 2025
Updated
May 12, 2025
Vendor
D-Link
Product
DI-8100
Classifications
CWE-787, CWE-121, CWE-119
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 11, 2025CVE publishedPublication date reported by the CVE source.
  2. May 12, 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?

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

  1. Affected versionversion=16.07.26A1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

D-Link · DI-8100version=16.07.26A1

Published CVSS scores

6.8VulDBAV:N/AC:H/Au:M/C:C/I:C/A:C
6.6VulDBCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
7.5VulDBCVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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
CWE-121Stack-based Buffer Overflow
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer

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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