CVE-2025-45865

TOTOLINK A3002R v4.0.0-B20230531.1404 was discovered to contain a buffer overflow via the dnsaddr parameter in the formDhcpv6s interface

Critical · published May 13, 2025

CVSS v3.1
9.8
EPSS
1%
Percentile
49.6
In the wild
Unconfirmed
What it is

🚨 A buffer overflow in the TOTOLINK A3002R could turn your network into an attacker's playground! 🔥 Think of the dnsaddr parameter as a cup that keeps overflowing, spilling everything inside when too much liquid is added — the router can't handle it, and everything goes awry. Just like a waiter needs to manage their trays, this parameter needs careful handling to prevent a disaster! An attacker exploiting this vulnerability could potentially compromise the entire router, gaining unauthorized access to connected devices and sensitive information. This kind of breach could lead to devastating data loss or network hijacking — a nightmare scenario for anyone relying on their network!

Put simply

Think of the dnsaddr parameter as a cup that keeps overflowing, spilling everything inside when too much liquid is added — the router can't handle it, and everything goes awry. Just like a waiter needs to manage their trays, this parameter needs careful handling to prevent a disaster! This buffer overflow in TOTOLINK A3002R v4.0.0-B20230531.1404 allows attackers to exploit the dnsaddr parameter on the formDhcpv6s interface, leading to potential remote code execution or denial of service.

What to do

An attacker exploiting this vulnerability could potentially compromise the entire router, gaining unauthorized access to connected devices and sensitive information. This kind of breach could lead to devastating data loss or network hijacking — a nightmare scenario for anyone relying on their network! Immediately patch your router to the latest firmware version 4.0.0-B20230531.1405 or later to close this vulnerability. Additionally, review your network configurations and ensure that proper access controls are in place to safeguard against unauthorized access. You've got this! Take action now, and you'll have your network safer in no time! 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00631 · 49.6th percentile
Published
2025-05-13T00:00Z
EPSS history
Timeline
  • 13 MAY 00:00Z
    TOTOLINK A3002R v4.0.0-B20230531.1404 was discovered to contain a buffer overflow via the dnsaddr parameter in the formDhcpv6s interface
    cvelistv5