How severe is CVE-2023-39665?

CVE-2023-39665 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-39665 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-39665?

CVE-2023-39665 affects Dlink Dir-868l Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-39665?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-39665 published?

CVE-2023-39665 was published on 2023-08-18 and last updated on 2026-06-17.

CVE-2023-39665

CVE-2023-39665 is a critical-severity vulnerability in Dlink Dir-868l Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Dlink Dir-868l Firmware
Published: 2023-08-18
Last modified: 2026-06-17

Description

D-Link DIR-868L fw_revA_1-12_eu_multi_20170316 was discovered to contain a buffer overflow via the acStack_50 parameter.

Frequently asked questions

What is CVE-2023-39665?: D-Link DIR-868L fw_revA_1-12_eu_multi_20170316 was discovered to contain a buffer overflow via the acStack_50 parameter.
How severe is CVE-2023-39665?: CVE-2023-39665 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-39665 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-39665?: CVE-2023-39665 affects Dlink Dir-868l Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-39665?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-39665 published?: CVE-2023-39665 was published on 2023-08-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:dlink:dir-868l_firmware:1.12_eu_multi_20170316:*:*:*:*:*:*:*

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