CVE-2023-32149

Root code execution via unchecked stack copy

Published May 3, 2024 · Updated Sep 18, 2024

Stack-based buffer overflow in D-Link DIR-2640 firmware 1.11B02 allows network-adjacent attackers to execute code as root. The prog.cgi request handler copies user-supplied web-management data into a fixed-length stack buffer without first validating its length. The management interface listens on TCP port 80 by default, requires no authentication for this path, and successful exploitation grants root-level code execution.

CVSS severity8.8
High
EPSS probability1.24%
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 D-Link DIR-2640 firmware 1.11B02 allows network-adjacent attackers to execute code as root. The prog.cgi request handler copies user-supplied web-management data into a fixed-length stack buffer without first validating its length. The management interface listens on TCP port 80 by default, requires no authentication for this path, and successful exploitation grants root-level code execution.

The record

CVE
CVE-2023-32149
Published
May 3, 2024
Updated
Sep 18, 2024
Vendor
D-Link
Product
DIR-2640
Classifications
CWE-121, T1190
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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=1.11B02 (non-US, CA version)

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

D-Link · DIR-2640version=1.11B02 (non-US, CA version)
D-Link · DIR-2640 Firmwareversion=0 <=1.11b02

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

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
T1190Exploit Public-Facing Application

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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