CVE-2023-26616Public exploitNetwork attack vector

Service interruption via oversized parental-control URL

Published Jun 29, 2023 · Updated Nov 27, 2024

Stack overflow in D-Link DIR-823G 1.02B05 allows remote attackers to interrupt router service through crafted parental-control URL data. SetParentsControlInfo uses each URL parameter's own string length as the copy limit instead of enforcing the destination buffer's capacity. No authentication or user interaction is required, and the public proof of concept demonstrates the overflow without establishing code execution.

CVSS severity9.8
Critical
EPSS probability1.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack overflow in D-Link DIR-823G 1.02B05 allows remote attackers to interrupt router service through crafted parental-control URL data. SetParentsControlInfo uses each URL parameter's own string length as the copy limit instead of enforcing the destination buffer's capacity. No authentication or user interaction is required, and the public proof of concept demonstrates the overflow without establishing code execution.

The record

CVE
CVE-2023-26616
Published
Jun 29, 2023
Updated
Nov 27, 2024
Vendor
D-Link
Product
DIR-823G
Classifications
CWE-120, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 27, 2024Record 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=1.02B05

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

D-Link · DIR-823Gversion=1.02B05

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499Endpoint Denial of Service

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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