CVE-2026-5815 | D-Link DIR-645 1.01/1.02/1.03 /cgi-bin/hedwig.cgi hedwigcgi_main stack-based overflow

VDB-356263 · CVE-2026-5815 · GCVE-100-356263 D-LINK DIR-645 1.01/1.02/1.03 /CGI-BIN/HEDWIG.CGI HEDWIGCGI_MAIN STACK-BASED OVERFLOW HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 8.0 $0-$5k 1.45+ Summaryinfo A vulnerability was found in D-Link DIR-645 1.01/1.02/1.03. It has been classified as critical. The affected element is the function hedwigcgi_main of the file /cgi-bin/hedwig.cgi. This manipulation causes stack-based overflow. This vulnerability only affects products that are no longer supported by the maintainer. This vulnerability appears as CVE-2026-5815. The attack may be initiated remotely. In addition, an exploit is available. Detailsinfo A vulnerability was found in D-Link DIR-645 1.01/1.02/1.03. It has been declared as critical. Affected by this vulnerability is the function hedwigcgi_main of the file /cgi-bin/hedwig.cgi. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is 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). As an impact it is known to affect confidentiality, integrity, and availability. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-5815. The exploitation appears to be easy. The attack can be launched remotely. Technical details and also a public exploit are known. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/08/2026). It is possible to download the exploit 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 Type Router Operating System Vendor D-Link Name DIR-645 Version 1.01 1.02 1.03 License commercial Support end of life 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 04/08/2026 Advisory disclosed 04/08/2026 +0 days VulDB entry created 04/08/2026 +0 days VulDB entry last update Sourcesinfo Vendor: dlink.com Advisory: github.com Status: Not defined CVE: CVE-2026-5815 (🔒) GCVE (CVE): GCVE-0-2026-5815 GCVE (VulDB): GCVE-100-356263 scip Labs: https://www.scip.ch/en/?labs.20161013 Entryinfo Created: 04/08/2026 17:35 Changes: 04/08/2026 17:35 (57) Complete: 🔍 Submitter: Pers1st Cache ID: 99:573:101 Submitinfo Accepted Submit #788298: D-Link DIR-645 1.01–1.03 Stack-based Buffer Overflow (by Pers1st) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸