CVE-2025-14208Known exploitationPublic exploitNetwork attack vector

Authenticated command execution via crafted PPP username

Published Dec 8, 2025 · Updated Dec 8, 2025

Command injection in D-Link DIR-823X 20250416 allows remote authenticated users to execute system commands via a crafted ppp_username value. The sub_415028 handler for /goform/set_wan_settings fails to validate the PPP username before using it in command processing. A valid web-management session and token are required, and successful exploitation runs attacker-supplied commands on the router.

CVSS severity6.3
Medium
EPSS probability3.39%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in D-Link DIR-823X 20250416 allows remote authenticated users to execute system commands via a crafted ppp_username value. The sub_415028 handler for /goform/set_wan_settings fails to validate the PPP username before using it in command processing. A valid web-management session and token are required, and successful exploitation runs attacker-supplied commands on the router.

The record

CVE
CVE-2025-14208
Published
Dec 8, 2025
Updated
Dec 8, 2025
Vendor
D-Link
Product
DIR-823X
Classifications
CWE-77, CWE-74, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 8, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 8, 2025Record updatedLatest update available in the CVE record.
  3. Sep 7, 2026Exploitation reportedShadowserver honeypot exploitation activity

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=20250416

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

D-Link · DIR-823Xversion=20250416

Published CVSS scores

6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
5.3VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

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
Privilegesauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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