CVE-2023-41221

mediumpriority · track · 27EPSS 0.009 · 59 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.87% (59th) EPSS

CVSS 6.8 · medium

Is it mine?

3 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-28

D-Link DIR-3040 prog.cgi SetWLanRadioSecurity 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-21621.

cvss

Technical severity, 0–10. One row per scoring source.

6.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.16.8mediumCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 0.9 · impact 5.9

v3.06.8mediumCVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.06.8mediumCVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hsecondary · zdi-disclosures@trendmicro.comexploitability 0.9 · impact 5.9

v3.16.8mediumAV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.16.2mediumCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimaryCWE-121USCWE-121US

affected products (3)

Products and version ranges known to be affected.

D-Link DIR-3040≤ 120B03enisa_euvdEU
D-Link Corp. DIR-3040≤ 1.20B03 Beta-Hotfixfstec_bduRU
dlink dir-3040 firmware≤ 1.20b03nvdUScpe:2.3:o:dlink:dir-3040_firmware:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-2291D-LINK DIR-3040: Mehrere Schwachstellen ermöglichen CodeausführungDeutsch2023-09-07csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen im D-LINK Routermodell DIR-3040 ausnutzen, um beliebigen Programmcode auszuführen.

also known as (6)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd cert_bund NVD CVE.org MITRE

published 2024-05-03modified 2026-06-17

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+16135 more

references (7)

External citations — patches, advisories, analysis.

scry

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