CVE-2023-44421

Root code execution via unsanitized PPPoE username

Published May 3, 2024 · Updated Aug 2, 2024

Command injection in D-Link DIR-X3260 1.02B02 and earlier allows remote authenticated users on the local network to execute code as root. The SetTriggerPPPoEValidate handler in prog.cgi passes an unvalidated, user-controlled username string into a system call. Access to HNAP on LAN-side ports 80 or 443 is required, and the paired authentication flaw removes the login barrier.

CVSS severity8.0
High
EPSS probability1.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in D-Link DIR-X3260 1.02B02 and earlier allows remote authenticated users on the local network to execute code as root. The SetTriggerPPPoEValidate handler in prog.cgi passes an unvalidated, user-controlled username string into a system call. Access to HNAP on LAN-side ports 80 or 443 is required, and the paired authentication flaw removes the login barrier.

The record

CVE
CVE-2023-44421
Published
May 3, 2024
Updated
Aug 2, 2024
Vendor
D-Link
Product
DIR-X3260
Classifications
CWE-78, T1059
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. May 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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=1.02B02
  2. Affected versionversion=1.04b01

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

D-Link · DIR-X3260version=1.02B02; version=1.04b01

Published CVSS scores

8.0NIST NVDCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.0Zero Day InitiativeCVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/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.

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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)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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