CVE-2025-3820: tenda i24_firmware

Vulnerability summary

CVE-2025-3820 is a high (CVSS 9.0) vulnerability in tenda i24_firmware. EPSS estimates a 12.69% chance of exploitation in the next 30 days, higher than 96.2% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 19-04-2025
   PublishedVulnerability first disclosed.
2. 21-04-2025
   Last modifiedVulnerability information updated.

Description

A vulnerability was found in Tenda W12 and i24 3.0.0.4(2887)/3.0.0.5(3644) and classified as critical. Affected by this issue is the function cgiSysUplinkCheckSet of the file /bin/httpd. The manipulation of the argument hostIp1/hostIp2 leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public 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).