CVE-2023-39750Network attack vector

Unauthenticated device halt via IPv6 parameter overflow

Published Aug 21, 2023 · Updated Oct 7, 2024

Buffer overflow in D-Link DAP-2660 firmware 1.13 allows remote attackers to halt the device via a crafted POST request to /bsc_ipv6. The /bsc_ipv6 handler processes the f_ipv6_enable parameter without enforcing its destination buffer's bounds. No authentication or user interaction is required, and the documented consequence is a device halt rather than code execution.

CVSS severity9.8
Critical
EPSS probability14.10%
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 DAP-2660 firmware 1.13 allows remote attackers to halt the device via a crafted POST request to /bsc_ipv6. The /bsc_ipv6 handler processes the f_ipv6_enable parameter without enforcing its destination buffer's bounds. No authentication or user interaction is required, and the documented consequence is a device halt rather than code execution.

The record

CVE
CVE-2023-39750
Published
Aug 21, 2023
Updated
Oct 7, 2024
Vendor
D-Link
Product
DAP-2660
Classifications
CWE-120, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 21, 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=1.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

D-Link · DAP-2660version=1.13

Published CVSS scores

9.8NIST NVDCVSS: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.

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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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499.004Application or System Exploitation

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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