D-Link DIR-600L HNAP cgibin hnap_main stack-based overflow

published 2026-11-15 10h ago modified 2026-11-15 9h ago also EUVD-2026-125951

cvss: 10.0; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: —; no EPSS score yet
public exploits: 0; none known

A flaw has been found in D-Link DIR-600L 2.17b02. Affected by this issue is the function hnap_main of the file htdocs/cgibin of the component HNAP Handler. Executing a manipulation can lead to stack-based buffer overflow. The attack can be executed remotely. The exploit has been published and may be used.

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Exploits and checks

github.com https://github.com/ruanyi101/router-firmware-security-advisories/blob/main/router-firmware-GitHub-advisories/advisories/D-Link-DIR-600L-HNAP-SOAPAction.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	10.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
CNA	3.1	10.0	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
CNA	3.0	10.0	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
CNA	2.0	10.0	AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
CNA	4.0	9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD	3.1	10.0	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CNA	2.0	10.0	AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

D-Link DIR-600L

Classification

Weakness

CWE-121 Stack-based Buffer Overflow
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

github.com /ruanyi101/router-firmware-security-advisories/blob/main/router-firmware-GitHub-advisories/advisories/D-Link-D
exploit
vuldb.com /vuln/437417
vdb-entry, technical-description
vuldb.com /vuln/437417/cti
signature, permissions-required
vuldb.com /cve/CVE-2026-129354
third-party-advisory
vuldb.com /submit/1043526
third-party-advisory
dlink.com /
product

Sources

CVE List CVE-2026-129354
NVD CVE-2026-129354

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