Vulnerability · Published Sep 14, 2026 · Assigned by VulDB
CVE-2026-90693D-Link DIR-878 WAN Settings SetWan3Settings stack-based overflow
Critical 9.9
In plain English
A critical-severity stack buffer overflow in DIR-878 from D-Link. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities).
Severity (CVSS 3.1)9.9Critical
Exploit odds (30 days)0.9%top 39.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A flaw has been found in D-Link DIR-878 120B05. This impacts the function SetWan3Settings of the component WAN Settings. This manipulation of the argument Primary/Secondary causes stack-based buffer overflow. Remote exploitation of the attack is possible.
Affected products (as reported)
Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:X/RL:X/RC:R
References
- VDB-403226 | D-Link DIR-878 WAN Settings SetWan3Settings stack-based overflow vdb-entry, technical-description
- VDB-403226 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- CVE-2026-90693 | CVE Analysis and Report third-party-advisory
- Submit #915573 | D-Link Router FW120B05_decode Memory Corruption third-party-advisory
- https://github.com/Amalll-Sec/router-vulnerability-research/blob/main/advisories/d-link/dir-878/SetWan3Settings/README.md related
- https://www.dlink.com/ product