CVE-2026-94089Public exploitNetwork attack vector

Unauthenticated CGI crash via unchecked credential copy

Published Sep 20, 2026 · Updated Sep 20, 2026

Stack-based buffer overflow in D-Link DIR-868L 2.01b05 allows remote attackers to crash its authentication CGI via a crafted request. The webfa_authentication.cgi handler passes the unauthenticated id value to strcpy without a length check, overwriting the stack through the saved return address. No authentication or user interaction is required; the public proof of concept demonstrates CGI-process termination and return-address control.

CVSS severity10.0
Critical
EPSS probability0.98%
Next 30 days · Oct 20, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in D-Link DIR-868L 2.01b05 allows remote attackers to crash its authentication CGI via a crafted request. The webfa_authentication.cgi handler passes the unauthenticated id value to strcpy without a length check, overwriting the stack through the saved return address. No authentication or user interaction is required; the public proof of concept demonstrates CGI-process termination and return-address control.

The record

CVE
CVE-2026-94089
Published
Sep 20, 2026
Updated
Sep 20, 2026
Vendor
D-Link
Product
DIR-868L
Classifications
CWE-121, CWE-119, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 20, 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=2.01b05

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

D-Link · DIR-868Lversion=2.01b05

Published CVSS scores

10.0VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
10.0VulDBAV:N/AC:L/Au:N/C:C/I:C/A:C
10.0VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
10.0VulDBCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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