Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-5211— D-Link DNS-1550-04 app_mgr.cgi UPnP_AV_Server_Path_Del stack-based overflow

Quick assessment

Affected
D-Link DNS-120
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

D-Link DNS-120等都是中国友讯（D-Link）公司的产品。D-Link DNS-120是一个网络存储适配器。D-Link DNR-202L是一个网络视频摄像机。D-Link DNS-315L是一个网络附加存储器。 D-Link多款产品存在安全漏洞，该漏洞源于对文件/cgi-bin/app_mgr.cgi中参数f_dir的错误操作导致栈缓冲区溢出。以下产品和版本受到影响：DNS-120 20260205及之前版本、DNR-202L 20260205及之前版本、DNS-315L 20260205及

CVSS 8.8 · High EPSS 0.70% · P50
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-5211

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
D-Link DNS-1550-04 app_mgr.cgi UPnP_AV_Server_Path_Del stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw has been 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 20260205. This vulnerability affects the function UPnP_AV_Server_Path_Del of the file /cgi-bin/app_mgr.cgi. Executing a manipulation of the argument f_dir can lead to stack-based buffer overflow. The attack can be executed remotely. The exploit has been published and may be used.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
多款D-Link产品安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
D-Link DNS-120等都是中国友讯（D-Link）公司的产品。D-Link DNS-120是一个网络存储适配器。D-Link DNR-202L是一个网络视频摄像机。D-Link DNS-315L是一个网络附加存储器。 D-Link多款产品存在安全漏洞，该漏洞源于对文件/cgi-bin/app_mgr.cgi中参数f_dir的错误操作导致栈缓冲区溢出。以下产品和版本受到影响：DNS-120 20260205及之前版本、DNR-202L 20260205及之前版本、DNS-315L 20260205及
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
D-Link DNS-120 20260205 -
D-Link DNR-202L 20260205 -
D-Link DNS-315L 20260205 -
D-Link DNS-320 20260205 -
D-Link DNS-320L 20260205 -
D-Link DNS-320LW 20260205 -
D-Link DNS-321 20260205 -
D-Link DNR-322L 20260205 -
D-Link DNS-323 20260205 -
D-Link DNS-325 20260205 -
D-Link DNS-326 20260205 -
D-Link DNS-327L 20260205 -
D-Link DNR-326 20260205 -
D-Link DNS-340L 20260205 -
D-Link DNS-343 20260205 -
D-Link DNS-345 20260205 -
D-Link DNS-726-4 20260205 -
D-Link DNS-1100-4 20260205 -
D-Link DNS-1200-05 20260205 -
D-Link DNS-1550-04 20260205 -

II. Public POCs for CVE-2026-5211

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 127157 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-5211

请登录查看更多情报信息。

Security Blog Posts for CVE-2026-5211 (1)

Vendor Pages for CVE-2026-5211 (1)

Same Patch Batch · D-Link · 2026-03-31 · 5 CVEs total

CVE-2026-5212 8.8 HIGH D-Link DNS-1550-04 webdav_mgr.cgi Webdav_Upload_File stack-based overflow
CVE-2026-5213 8.8 HIGH D-Link DNS-1550-04 account_mgr.cgi cgi_adduser_to_session stack-based overflow
CVE-2026-5214 8.8 HIGH D-Link DNS-1550-04 account_mgr.cgi cgi_addgroup_get_group_quota_minsize stack-based overfl
CVE-2026-5215 4.3 MEDIUM D-Link DNS-1550-04 network_mgr.cgi cgi_get_ipv6 access control

IV. Related Vulnerabilities

Same product: DNS-120
Same vendor: D-Link
Same weakness: CWE-121

V. Comments for CVE-2026-5211

No comments yet

Leave a comment