CVE-2023-44808Network attack vector

Remote code execution via stack overflow

Published Oct 16, 2023 · Updated Sep 16, 2024

A stack overflow in D-Link DIR-820L 1.05B03 allows remote attackers to execute code through network requests. The sub_4507CC function mishandles input in a stack buffer, allowing an out-of-bounds write; public records do not disclose the specific request parameter or endpoint. The condition is unauthenticated and network reachable, and successful exploitation can compromise router confidentiality, integrity, and availability.

CVSS severity9.8
Critical
EPSS probability0.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A stack overflow in D-Link DIR-820L 1.05B03 allows remote attackers to execute code through network requests. The sub_4507CC function mishandles input in a stack buffer, allowing an out-of-bounds write; public records do not disclose the specific request parameter or endpoint. The condition is unauthenticated and network reachable, and successful exploitation can compromise router confidentiality, integrity, and availability.

The record

CVE
CVE-2023-44808
Published
Oct 16, 2023
Updated
Sep 16, 2024
Vendor
D-Link
Product
D-Link DIR-820L
Classifications
CWE-787, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 16, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=1.05b03

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

D-Link · D-Link DIR-820Lversion=1.05b03

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
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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