Vulnerability · Published Apr 8, 2026 · Assigned by VulDB
CVE-2026-5815D-Link DIR-645 hedwig.cgi hedwigcgi_main stack-based overflow
High 8.8
In plain English
A high-severity stack buffer overflow in DIR-645 from D-Link. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.7%top 46.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A vulnerability was detected in D-Link DIR-645 1.01/1.02/1.03. Impacted is the function hedwigcgi_main of the file /cgi-bin/hedwig.cgi. The manipulation results in stack-based buffer overflow. The attack can be launched remotely. The exploit is now public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.
Affected products (as reported)
Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
References
- VDB-356263 | D-Link DIR-645 hedwig.cgi hedwigcgi_main stack-based overflow vdb-entry, technical-description
- VDB-356263 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #788298 | D-Link DIR-645 1.01–1.03 Stack-based Buffer Overflow third-party-advisory
- https://github.com/Pers1st0/CVE/blob/main/stack-based%20buffer%20overflow%20vulnerability%20exists%20in%20the%20hedwig.cgi%20of%20D-Link%20DIR-645.md related
- https://github.com/Pers1st0/CVE/blob/main/stack-based%20buffer%20overflow%20vulnerability%20exists%20in%20the%20hedwig.cgi%20of%20D-Link%20DIR-645.md#poc exploit
- https://www.dlink.com/ product