CVE-2026-5211 | D-Link DNS-1550-04 up to 20260205 /cgi-bin/app_mgr.cgi UPnP_AV_Server_Path_Del f_dir stack-based overflow

VDB-354347 · CVE-2026-5211 · GCVE-100-354347 D-LINK DNS-1550-04 UP TO 20260205 /CGI-BIN/APP_MGR.CGI UPNP_AV_SERVER_PATH_DEL F_DIR STACK-BASED OVERFLOW HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 8.0 $0-$5k 1.43+ Summaryinfo A vulnerability 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 20260205. It has been rated as critical. This issue affects the function UPnP_AV_Server_Path_Del of the file /cgi-bin/app_mgr.cgi. The manipulation of the argument f_dir leads to stack-based overflow. This vulnerability is uniquely identified as CVE-2026-5211. The attack is possible to be carried out remotely. Moreover, an exploit is present. Detailsinfo A vulnerability 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 20260205. It has been rated as critical. This issue affects the function UPnP_AV_Server_Path_Del of the file /cgi-bin/app_mgr.cgi. The manipulation of the argument f_dir with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is confidentiality, integrity, and availability. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-5211. The exploitation is known to be easy. The attack may be initiated remotely. Technical details as well as a public exploit are known. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/31/2026). The exploit is available at github.com. It is declared as proof-of-concept. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Vendor D-Link Name DNR-202L DNR-322L DNR-326 DNS-120 DNS-315L DNS-320 DNS-320L DNS-320LW DNS-321 DNS-323 DNS-325 DNS-326 DNS-327L DNS-340L DNS-343 DNS-345 DNS-726-4 DNS-1100-4 DNS-1200-05 DNS-1550-04 Version 20260205 License commercial Website Vendor: https://www.dlink.com/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 8.8 VulDB Meta Temp Score: 8.0 VulDB Base Score: 8.8 VulDB Temp Score: 8.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Stack-based overflow CWE: CWE-121 / CWE-119 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Access: Public Status: Proof-of-Concept Download: 🔒 Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 03/31/2026 Advisory disclosed 03/31/2026 +0 days VulDB entry created 03/31/2026 +0 days VulDB entry last update Sourcesinfo Vendor: dlink.com Advisory: github.com Status: Not defined CVE: CVE-2026-5211 (🔒) GCVE (CVE): GCVE-0-2026-5211 GCVE (VulDB): GCVE-100-354347 scip Labs: https://www.scip.ch/en/?labs.20161013 Entryinfo Created: 03/31/2026 12:34 Changes: 03/31/2026 12:34 (56) Complete: 🔍 Submitter: Ziyue Xie Cache ID: 99:55B:101 Submitinfo Accepted Submit #780434: D-Link DNS-120/202L/315L/320/320L/320LW/321/322L/323/325/326/327L/326/340L/343/345/726-4/1100-4/1200-05/1550-04 up to 20260205 Stack-based Buffer Overflow (by Ziyue Xie) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸