CVE-2026-76651 Pre-Authentication Multipart Boundary Buffer Overflow in HTTP Service in TP-Link TL-WR841N
Remote unauthenticated attackers can trigger a buffer overflow in the HTTP service via crafted multipart requests, causing memory corruption and undefined behavior.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-76651?
CVE-2026-76651 is a medium-severity memory corruption vulnerability in TP-Link System Inc. TL-WR841N v14, published on 28 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A buffer overflow vulnerability exists in the embedded HTTP service in TL-WR841N v14 when processing multipart/form-data requests. Insufficient validation of an attacker-controlled boundary parameter may allow a remote unauthenticated attacker to submit a crafted request that corrupts memory by overwriting data beyond the bounds of an internal buffer.
Successful exploitation may result in modification or corruption of process memory, potentially leading to undefined application behavior. Arbitrary code execution, information disclosure, and denial-of-service conditions have not been demonstrated.
Weakness: CWE-120
Which versions are affected by CVE-2026-76651?
How do I fix CVE-2026-76651?
No fix has been published for CVE-2026-76651 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-76651 being exploited?
There is no known exploitation of CVE-2026-76651 in the wild and no public exploit code.
Sources
Also known as GHSA-wqxh-m9g7-9pc2.