D-Link DAP-1620 Authentication storage mod_graph_auth_uri_handler stack-based overflow

published 2025-03-22 19 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-7274

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 8.8%; EPSS 8.8% chance of exploitation in 30 days, percentile 95%
public exploits: 0; none known

A vulnerability has been found in D-Link DAP-1620 1.03 and classified as critical. This vulnerability affects the function mod_graph_auth_uri_handler of the file /storage of the component Authentication Handler. The manipulation leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: total
Assessed: 19 mo ago (2025-03-24)

Exploit prediction

8.85% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

witty-maiasaura-083.notion.site https://witty-maiasaura-083.notion.site/D-link-DAP-1620-mod_graph_auth_uri_handler-Vulnerability-1afb2f2a6361809ea7f2dc4df3b85f1f referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
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:N/SI:N/SA:N
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	2.0	10.0	AV:N/AC:L/Au:N/C:C/I:C/A:C
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:N/SI:N/SA:N/E:X/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

Affected products

D-Link DAP-1620

Classification

Weakness

CWE-121 Stack-based Buffer Overflow
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-787 Out-of-bounds Write

References

witty-maiasaura-083.notion.site /D-link-DAP-1620-mod_graph_auth_uri_handler-Vulnerability-1afb2f2a6361809ea7f2dc4df3b85f1f
exploit, third-party-advisory
vuldb.com /?id.300622
vdb-entry, technical-description, third-party-advisory
vuldb.com /?ctiid.300622
signature, permissions-required, vdb-entry
vuldb.com /?submit.518969
third-party-advisory, vdb-entry
dlink.com /
product

Sources

CVE List CVE-2025-2620
NVD CVE-2025-2620

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary