CVE-2025-0492Network attack vector

Unauthenticated router crash via null dereference

Published Jan 15, 2025 · Updated Feb 12, 2025

NULL pointer dereference in FUN_00412244 in D-Link DIR-823X 240126 and 240802 allows remote attackers to crash the router. The public record identifies FUN_00412244 but does not disclose the request field or invalid pointer operation that reaches the dereference. No authentication or user interaction is required, and successful exploitation interrupts the router's service without reported data disclosure or modification.

CVSS severity8.7
High
EPSS probability1.87%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in FUN_00412244 in D-Link DIR-823X 240126 and 240802 allows remote attackers to crash the router. The public record identifies FUN_00412244 but does not disclose the request field or invalid pointer operation that reaches the dereference. No authentication or user interaction is required, and successful exploitation interrupts the router's service without reported data disclosure or modification.

The record

CVE
CVE-2025-0492
Published
Jan 15, 2025
Updated
Feb 12, 2025
Vendor
D-Link
Product
DIR-823X
Classifications
CWE-404, CWE-476, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 12, 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=240126
  2. Affected versionversion=240802

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

D-Link · DIR-823Xversion=240126; version=240802

Published CVSS scores

8.7VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.8VulDBAV:N/AC:L/Au:N/C:N/I:N/A:C
7.5VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

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

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-404Improper Resource Shutdown or Release
CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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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