CVE-2025-12209: o3 Buffer Overflow — Exploit

Description

A vulnerability was determined in Tenda O3 1.0.0.10(2478). Affected is the function SetValue/GetValue of the file /goform/setDhcpConfig. Executing a manipulation of the argument dhcpEn can lead to stack-based buffer overflow. The attack may be performed from remote. The exploit has been publicly disclosed and may be utilized.

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CVSS v3.1 Score

8.8

HIGH

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

Weakness Type (CWE)

CWE-119 Buffer Overflow

CWE-121 CWE-121

Affected Products

Vendor	Product	Versions
tenda	o3_firmware1.0.0.10\(2478\)	All
tenda	o3	All

References

Exploits

https://github.com/noahze01/IoT-vulnerable/blob/main/Tenda/O3v2.0/setDhcpConfig.md https://github.com/noahze01/IoT-vulnerable/blob/main/Tenda/O3v2.0/setDhcpConfig.md

Other References

https://vuldb.com/?ctiid.329879 https://vuldb.com/?id.329879 https://vuldb.com/?submit.673263 https://www.tenda.com.cn/

Frequently Asked Questions

What is CVE-2025-12209? +

A vulnerability was determined in Tenda O3 1.0.0.10(2478). Affected is the function SetValue/GetValue of the file /goform/setDhcpConfig. Executing a manipulation of the argument dhcpEn can lead to stack-based buffer overflow. The attack may be performed from remote. The exploit has been publicly disclosed and may be utilized. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2025-12209? +

CVE-2025-12209 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-12209? +

CVE-2025-12209 affects products from tenda, specifically: o3, o3_firmware1.0.0.10\(2478\). Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-12209? +

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.

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