cbcvebase.
CVE-2025-4544
published 2025-05-11

CVE-2025-4544: A vulnerability was found in D-Link DI-8100 up to 16.07.26A1 and classified as critical. This issue affects some unknown processing of the file /ddos.asp of…

PriorityP260high7.2CVSS 3.1
AVNACLPRHUINSUCHIHAH
EPSS
7.43%
93.7th percentile
A vulnerability was found in D-Link DI-8100 up to 16.07.26A1 and classified as critical. This issue affects some unknown processing of the file /ddos.asp of the component jhttpd. The manipulation of the argument def_max/def_time/def_tcp_max/def_tcp_time/def_udp_max/def_udp_time/def_icmp_max leads to stack-based buffer overflow. The attack may be initiated remotely. The complexity of an attack is rather high. The exploitation is known to be difficult.

Affected

2 ranges
VendorProductVersion rangeFixed in
d-linkdi-8100——
dlinkdi-8100_firmware<= 16.07.26a1—

Detection & IOCsextracted from sources · hover to see the quote

path/ddos.asp↗
snort
alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS D-Link DI-8100 ddos.asp multiple parameters Buffer Overflow Attempt (CVE-2025-4544)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/ddos.asp?"; fast_pattern; startswith; pcre:"/^(?:def_max|def_time|def_tcp_max|def_tcp_time|def_udp_max|def_udp_time|def_icmp_max|def_icmp_time|def_other_max|def_other_time|maclist|reconn_en|reconn_limit)\x3d[^\x26$]{100,}(?:\x26|$)/R"; reference:url,github.com/Yhuanhuan01/DI-8100_Vulnerability_Report/blob/main/Vulnerability_Report.md; reference:cve,2025-4544; classtype:web-application-attack; sid:2062263; rev:2; metadata:affected_product D_Link, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_05_12, cve CVE_2025_4544, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, updated_at 2025_05_13, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)
  • →Exploit targets HTTP GET requests to /ddos.asp on D-Link DI-8100 (jhttpd component). Look for any of the vulnerable parameters (def_max, def_time, def_tcp_max, def_tcp_time, def_udp_max, def_udp_time, def_icmp_max, def_icmp_time, def_other_max, def_other_time, maclist, reconn_en, reconn_limit) with values of 100 or more characters, indicative of a stack-based buffer overflow attempt.
  • →Attack is initiated remotely via HTTP GET to the device's web management interface (jhttpd). Traffic is expected in plaintext (not TLS). Deploy detection at the network perimeter and internally.
  • →MITRE ATT&CK mapping: Initial Access (TA0001) via Exploit Public-Facing Application (T1190). Classify detections as web-application-attack / Major severity.
  • ·Affected versions are D-Link DI-8100 up to and including 16.07.26A1. The vulnerability is in the jhttpd component processing /ddos.asp. Exploitation complexity is rated high, but remote exploitation without authentication is possible.
  • ·The Snort/Suricata rule (sid:2062263, rev:2) was updated on 2025-05-13. Ensure your ruleset is current to capture the latest revision.

CVSS provenance

nvdv3.17.2HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
nvdv4.07.5HIGHCVSS:4.0/AV:N/AC:H/AT:N/PR:H/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
nvdv2.06.8MEDIUMAV:N/AC:H/Au:M/C:C/I:C/A:C
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