CVE-2026-3809: Tenda FH1202 NatSaticSetting fromNatStaticSetting stack-based overflow

Vulnerability summary

CVE-2026-3809 is a high (CVSS 9.0) vulnerability in tenda fh1202_firmware. EPSS estimates a 1.05% chance of exploitation in the next 30 days, higher than 63.9% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 09-03-2026
   PublishedVulnerability first disclosed.
2. 10-03-2026
   Last modifiedVulnerability information updated.

Description

A flaw has been found in Tenda FH1202 1.2.0.14(408). The impacted element is the function fromNatStaticSetting of the file /goform/NatSaticSetting. Executing a manipulation of the argument page can lead to stack-based buffer overflow. The attack may be launched remotely. The exploit has been published and may be used.

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
• CWE-121Stack-based Buffer OverflowA 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).