CVE-2022-43648

Adjacent-network code execution via unchecked heap copy

Published Mar 29, 2023 · Updated Feb 12, 2025

Heap-based buffer overflow in D-Link DIR-3040 1.20B03 allows network-adjacent attackers to execute code through MiniDLNA requests. MiniDLNA copies attacker-controlled data into a heap buffer without first validating its length. No authentication or user interaction is required, and successful exploitation runs code in the MiniDLNA service context.

CVSS severity8.8
High
EPSS probability0.92%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in D-Link DIR-3040 1.20B03 allows network-adjacent attackers to execute code through MiniDLNA requests. MiniDLNA copies attacker-controlled data into a heap buffer without first validating its length. No authentication or user interaction is required, and successful exploitation runs code in the MiniDLNA service context.

The record

CVE
CVE-2022-43648
Published
Mar 29, 2023
Updated
Feb 12, 2025
Vendor
D-Link
Product
DIR-3040
Classifications
CWE-122, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 29, 2023CVE 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=1.20B03

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

D-Link · DIR-3040version=1.20B03

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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1210Exploitation of Remote Services

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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