CVE-2025-7945: A vulnerability was found in D-Link DIR-513 up to 20190831. It has been declared as critical. This vulnerability affects the function formSetWanDhcpplus of the…

PriorityP265high8.8CVSS 3.1

AVNACLPRLUINSUCHIHAH

EPSS

4.45%

90.3th percentile

A vulnerability was found in D-Link DIR-513 up to 20190831. It has been declared as critical. This vulnerability affects the function formSetWanDhcpplus of the file /goform/formSetWanDhcpplus. The manipulation of the argument curTime leads to buffer overflow. The attack can be initiated remotely. This vulnerability only affects products that are no longer supported by the maintainer.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
d-link	dir-513	—	—

Detection & IOCsextracted from sources · hover to see the quote

path/goform/formSetWanDhcpplus↗

urlhttps://github.com/LYN1ng/D-linkdir513

commandPOST /goform/formSetWanDhcpplus

snort

alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS D-Link formSetWanDhcpplus curTime Parameter Buffer Overflow Attempt (CVE-2025-7945)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:26; content:"/goform/formSetWanDhcpplus"; fast_pattern; http.request_body; content:"curTime|3d|"; pcre:"/^[^\x26$]{100,}(?:\x26|$)/R"; reference:url,github.com/LYN1ng/D-linkdir513; reference:cve,2025-7945; classtype:web-application-attack; sid:2063685; rev:1; metadata:affected_product D_Link, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_07_23, cve CVE_2025_7945, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_07_23, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)

→Exploit is delivered via HTTP POST to the exact URI /goform/formSetWanDhcpplus (URI length is exactly 26 bytes); match on this URI with bsize:26 to avoid false positives.
→The overflow payload is carried in the POST body as the curTime parameter (URL-encoded '=' is 0x3d); look for 'curTime=' followed by 100 or more non-ampersand characters to identify a buffer overflow attempt.
→Traffic is plaintext HTTP (not TLS); deploy detection at the network perimeter and internally on segments hosting D-Link DIR-513 devices.
→Attack maps to MITRE ATT&CK T1190 (Exploit Public-Facing Application) under tactic TA0001 (Initial Access); correlate with other exploitation attempts against network equipment.

·The vulnerability only affects D-Link DIR-513 firmware up to 20190831, a product that is end-of-life and will receive no vendor patch; affected devices should be isolated or replaced. ↗

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvdv4.08.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/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

nvdv2.09.0CRITICALAV:N/AC:L/Au:S/C:C/I:C/A:C

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