CVE-2025-3538Public exploit

Code execution via unbounded callback copy

Published Apr 13, 2025 · Updated Apr 14, 2025

Stack-based buffer overflow in D-Link DI-8100 16.07.26A1 allows remote attackers to crash jhttpd or execute code via auth.asp. The auth_asp function passes the attacker-controlled callback value to sprintf for copying into stack buffer v65 when usr and pwd are empty, without a length bound. A local-network position is required, but authentication is not; demonstrated return-address control supports a crash, while code execution remains theoretical.

CVSS severity8.8
High
EPSS probability13.19%
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 attackers to crash jhttpd or execute code via auth.asp. The auth_asp function passes the attacker-controlled callback value to sprintf for copying into stack buffer v65 when usr and pwd are empty, without a length bound. A local-network position is required, but authentication is not; demonstrated return-address control supports a crash, while code execution remains theoretical.

The record

CVE
CVE-2025-3538
Published
Apr 13, 2025
Updated
Apr 14, 2025
Vendor
D-Link
Product
DI-8100
Classifications
CWE-787, CWE-119, CWE-121, T1190
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 13, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 14, 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 vectoradjacent
Required privilegesunauthenticated

What is affected?

D-Link · DI-8100version=16.07.26A1

Published CVSS scores

8.3VulDBAV:A/AC:L/Au:N/C:C/I:C/A:C
8.8VulDBCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.7VulDBCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-121Stack-based Buffer Overflow
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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