CVE-2025-9781: a702r Buffer Overflow (CVSS 8.8)

Description

A vulnerability has been found in TOTOLINK A702R 4.0.0-B20211108.1423. This affects the function sub_4162DC of the file /boafrm/formFilter. Such manipulation of the argument ip6addr leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.

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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-120 CWE-120

Affected Products

Vendor	Product	Versions
totolink	a702r_firmware	All
totolink	a702r	All

References

Other References

https://github.com/rew1X/CVE/blob/main/TOTOLINK/A702R/formFilter/formFilter.md https://github.com/rew1X/CVE/blob/main/TOTOLINK/A702R/formFilter/formFilter.md#poc https://vuldb.com/?ctiid.322083 https://vuldb.com/?id.322083 https://vuldb.com/?submit.640989 https://www.totolink.net/

Frequently Asked Questions

What is CVE-2025-9781? +

A vulnerability has been found in TOTOLINK A702R 4.0.0-B20211108.1423. This affects the function sub_4162DC of the file /boafrm/formFilter. Such manipulation of the argument ip6addr leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2025-9781? +

CVE-2025-9781 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-2025-9781? +

CVE-2025-9781 affects products from totolink, specifically: a702r, a702r_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-9781? +

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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