CVE-2025-28221: w6-s Buffer Overflow (CVSS 7.5)

Description

Tenda W6_S v1.0.0.4_510 has a Buffer Overflow vulnerability in the set_local_time function, which allows remote attackers to cause web server crash via parameter time passed to the binary through a POST request.

Is your site exposed to CVE-2025-28221?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-120 CWE-120

Affected Products

Vendor	Product	Versions
tenda	w6-s_firmware	All
tenda	w6-s	All

References

Other References

https://github.com/IdaJea/IOT_vuln_1/blob/master/w6_s_v1.0.0.4/time.pdf

Frequently Asked Questions

What is CVE-2025-28221? +

Tenda W6_S v1.0.0.4_510 has a Buffer Overflow vulnerability in the set_local_time function, which allows remote attackers to cause web server crash via parameter time passed to the binary through a POST request. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-28221? +

CVE-2025-28221 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-28221? +

CVE-2025-28221 affects products from tenda, specifically: w6-s, w6-s_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-28221? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-27820

zlib is a Ruby interface for the zlib compression/decompression library. Versions 3.0.0 and below, 3.1.0, 3.1.1, 3.2.0 and 3.2.1 contain …

CVE-2025-8412

A Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in SUSE Virtual Machine Driver Pack allows an …

CVE-2025-11698

A denial-of-service issue exists in 5380/5480/5580 controllers boot firmware lower than version 1.072. This vulnerability could potentially allow a malicious …

CVE-2025-12012

A denial-of-service issue exists in 5380/5480/5580 controllers. This vulnerability could potentially allow a malicious user to write invalid file data …

CVE-2025-12011

A denial-of-service issue exists in 5370/5570 controllers. This vulnerability could potentially allow a remote user to load an invalid project, …

CVE-2024-13503

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability in Newtec NTC2218, NTC2250, NTC2299 on Linux, PowerPC, ARM …

CVE-2025-28221