cbcvebase.
CVE-2024-8129
published 2024-08-24

CVE-2024-8129: A vulnerability, which was classified as critical, was found in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, DNS-323…

PriorityP277critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
22.85%
97.5th percentile
A vulnerability, which was classified as critical, was found in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, DNS-323, DNS-325, DNS-326, DNS-327L, DNR-326, DNS-340L, DNS-343, DNS-345, DNS-726-4, DNS-1100-4, DNS-1200-05 and DNS-1550-04 up to 20240814. Affected is the function cgi_s3_modify of the file /cgi-bin/s3.cgi of the component HTTP POST Request Handler. The manipulation of the argument f_job_name leads to command injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. NOTE: This vulnerability only affects products that are no longer supported by the maintainer. NOTE: Vendor was contacted early and confirmed that the product is end-of-life. It should be retired and replaced.

Affected

20 ranges
VendorProductVersion rangeFixed in
d-linkdnr-202l——
d-linkdnr-322l——
d-linkdnr-326——
d-linkdns-1100-4——
d-linkdns-120——
d-linkdns-1200-05——
d-linkdns-1550-04——
d-linkdns-315l——
d-linkdns-320——
d-linkdns-320l——
d-linkdns-320lw——
d-linkdns-321——
d-linkdns-323——
d-linkdns-325——
d-linkdns-326——
d-linkdns-327l——
d-linkdns-340l——
d-linkdns-343——
d-linkdns-345——
d-linkdns-726-4——

Detection & IOCsextracted from sources · hover to see the quote

path/cgi-bin/s3.cgi
snort
alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS D-Link s3.cgi Multiple Parameters Command Injection Attempt (CVE-2024-8129, CVE-2024-8130)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:15; content:"/cgi-bin/s3.cgi"; fast_pattern; http.request_body; pcre:"/f_(?:job_name|a_key)\x3d[^\x26]*?(?:(?:\x3b|%3[Bb])|(?:\x0a|%0[Aa])|(?:\x60|%60)|(?:\x7c|%7[Cc])|(?:\x24|%24))+/"; reference:cve,2024-8129; reference:cve,2024-8130; classtype:attempted-admin; sid:2065116; rev:1; metadata:affected_product D_Link, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_10_09, cve CVE_2024_8129_CVE_2024_8130, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_10_09, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)
  • →Detect HTTP POST requests targeting /cgi-bin/s3.cgi with command injection characters (;, newline, backtick, pipe, $) in the f_job_name or f_a_key POST body parameters
  • →The vulnerable function is cgi_s3_modify in /cgi-bin/s3.cgi; the injection point is the f_job_name argument via HTTP POST ↗
  • →Traffic is expected in plaintext (no TLS); deploy detection at perimeter and internal network boundaries
  • →Attack maps to MITRE ATT&CK T1190 (Exploit Public-Facing Application) under tactic TA0001 (Initial Access)
  • ·All affected D-Link devices (DNS-120, DNR-202L, DNS-315L, DNS-320/320L/320LW/321/323/325/326/327L, DNR-322L/326, DNS-340L/343/345/726-4/1100-4/1200-05/1550-04) are end-of-life and will not receive patches; the only remediation is device retirement/replacement ↗
  • ·The Snort/Suricata rule (sid:2065116) also covers the related CVE-2024-8130 (f_a_key parameter); both CVEs share the same rule and detection logic

CVSS provenance

nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv4.05.3MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/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
nvdv2.06.5MEDIUMAV:N/AC:L/Au:S/C:P/I:P/A:P
Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.