CVE-2022-41140

Root code execution via unchecked stack concatenation

Published Jan 26, 2023 · Updated Apr 1, 2025

Stack-based buffer overflow in prog.cgi on affected D-Link routers allows remote attackers to execute arbitrary code as root via HTTP. The CGI binary passes crafted HTTP-request data to strcat(), which appends it without a length check into a 512-byte stack buffer. Attackers need network adjacency to reach the LAN-side lighttpd service on TCP port 80, but authentication and user interaction are not required.

CVSS severity8.8
High
EPSS probability1.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in prog.cgi on affected D-Link routers allows remote attackers to execute arbitrary code as root via HTTP. The CGI binary passes crafted HTTP-request data to strcat(), which appends it without a length check into a 512-byte stack buffer. Attackers need network adjacency to reach the LAN-side lighttpd service on TCP port 80, but authentication and user interaction are not required.

The record

CVE
CVE-2022-41140
Published
Jan 26, 2023
Updated
Apr 1, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-121, CWE-787, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 1, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8Zero Day InitiativeCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:A/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

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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-787Out-of-bounds Write
T1210Exploitation of Remote Services

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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