How severe is CVE-2023-41218?

CVE-2023-41218 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-41218 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-41218?

CVE-2023-41218 affects Dlink Dir-3040 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-41218?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2023-41218 have an EU (EUVD) identifier?

Yes. CVE-2023-41218 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-45735.

When was CVE-2023-41218 published?

CVE-2023-41218 was published on 2024-05-03 and last updated on 2026-06-17.

CVE-2023-41218

CVE-2023-41218 is a medium-severity vulnerability in Dlink Dir-3040 Firmware with a CVSS 3.x base score of 6.8. 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-787.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-45735
Weakness: CWE-787
Affected product: Dlink Dir-3040 Firmware
Published: 2024-05-03
Last modified: 2026-06-17

Description

D-Link DIR-3040 prog.cgi SetWan3Settings Stack-Based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DIR-3040 routers. Authentication is required to exploit this vulnerability. The specific flaw exists within the prog.cgi binary, which handles HNAP requests made to the lighttpd webserver listening on TCP ports 80 and 443. The issue results from the lack of proper validation of a user-supplied string before copying it to a fixed-size stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-21618.

Frequently asked questions

What is CVE-2023-41218?: D-Link DIR-3040 prog.cgi SetWan3Settings Stack-Based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DIR-3040 routers. Authentication is required to exploit this vulnerability. The specific flaw exists within the prog.cgi binary, which handles HNAP requests made to the lighttpd webserver listening on TCP ports 80 and 443. The issue results from the lack of proper validation of a user-supplied string before copying it to a fixed-size stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-21618.
How severe is CVE-2023-41218?: CVE-2023-41218 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-41218 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-41218?: CVE-2023-41218 affects Dlink Dir-3040 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-41218?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-41218 have an EU (EUVD) identifier?: Yes. CVE-2023-41218 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-45735.
When was CVE-2023-41218 published?: CVE-2023-41218 was published on 2024-05-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:dlink:dir-3040_firmware:*:*:*:*:*:*:*:*

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