CVE-2023-39668Network attack vector

Service disruption via inet_ntoa buffer overflow

Published Aug 18, 2023 · Updated Oct 7, 2024

Buffer overflow in D-Link DIR-868L firmware fw_revA_1-12_eu_multi_20170316 allows remote attackers to corrupt memory via crafted input. The inet_ntoa() function processes the param_2 value without adequate bounds handling, allowing oversized data to overrun a buffer. The CVSS assessment models unauthenticated network access with no user interaction and high confidentiality, integrity, and availability impact; the public record does not document a safer trigger or confirmed exploitation outcome.

CVSS severity9.8
Critical
EPSS probability1.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in D-Link DIR-868L firmware fw_revA_1-12_eu_multi_20170316 allows remote attackers to corrupt memory via crafted input. The inet_ntoa() function processes the param_2 value without adequate bounds handling, allowing oversized data to overrun a buffer. The CVSS assessment models unauthenticated network access with no user interaction and high confidentiality, integrity, and availability impact; the public record does not document a safer trigger or confirmed exploitation outcome.

The record

CVE
CVE-2023-39668
Published
Aug 18, 2023
Updated
Oct 7, 2024
Vendor
D-Link
Product
DIR-868L
Classifications
CWE-120, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 18, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 7, 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=fw_revA_1-12_eu_multi_20170316

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

D-Link · DIR-868Lversion=fw_revA_1-12_eu_multi_20170316

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic 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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