CVE-2025-4356Public exploitNetwork attack vector

Authenticated memory corruption via oversized request URI

Published May 6, 2025 · Updated May 6, 2025

Stack-based buffer overflow in D-Link DAP-1520 1.10B04_BETA02 allows remote authenticated users to corrupt memory via a long URI. The mod_graph_auth_uri_handler code in mod_graph_auth.so uses sprintf to copy URI-derived data into a stack buffer without a length bound. An authenticated HTTP request with an oversized path can crash the web service and corrupt process memory; code execution is not demonstrated.

CVSS severity8.7
High
EPSS probability1.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stack-based buffer overflow in D-Link DAP-1520 1.10B04_BETA02 allows remote authenticated users to corrupt memory via a long URI. The mod_graph_auth_uri_handler code in mod_graph_auth.so uses sprintf to copy URI-derived data into a stack buffer without a length bound. An authenticated HTTP request with an oversized path can crash the web service and corrupt process memory; code execution is not demonstrated.

The record

CVE
CVE-2025-4356
Published
May 6, 2025
Updated
May 6, 2025
Vendor
D-Link
Product
DAP-1520
Classifications
CWE-119, CWE-121, CWE-787, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 2025CVE publishedPublication date reported by the CVE source.
  2. May 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=1.10B04_BETA02

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

D-Link · DAP-1520version=1.10B04_BETA02

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo