CVE-2026-7247Public exploitNetwork attack vector

Persistent service crash via unbounded Name copy

Published Apr 28, 2026 · Updated Apr 28, 2026

Stack-based buffer overflow in D-Link DI-8100 16.07.26A1 allows remote authenticated users to crash its HTTP service via a crafted Name parameter. The file_exten_asp CGI handler passes Name directly to sprintf without validating its length when opt is add or mod, overwriting its stack buffer and control data. A valid administrative session and remote access to file_exten.asp are required; the demonstrated crash persists until the device is rebooted.

CVSS severity7.2
High
EPSS probability0.72%
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 its HTTP service via a crafted Name parameter. The file_exten_asp CGI handler passes Name directly to sprintf without validating its length when opt is add or mod, overwriting its stack buffer and control data. A valid administrative session and remote access to file_exten.asp are required; the demonstrated crash persists until the device is rebooted.

The record

CVE
CVE-2026-7247
Published
Apr 28, 2026
Updated
Apr 28, 2026
Vendor
D-Link
Product
DI-8100
Classifications
CWE-120, CWE-119, T1210
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 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=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

7.3VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
7.2VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
8.3VulDBAV:N/AC:L/Au:M/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.

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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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1210Exploitation of Remote Services

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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