CVE-2025-53888

CRITICAL

RIOT-OS <= 2025.04 - Buffer Overflow in l2filter_add() Function

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2025-53888. PoCs published by namberino.

AI-analyzed exploit summary The repository provides detailed technical analysis of CVE-2025-46176 and CVE-2025-52079, including firmware extraction, hardcoded credentials, and improper access control in D-Link routers. It includes screenshots and step-by-step breakdowns of the vulnerabilities but lacks functional exploit code.

Description

RIOT-OS, an operating system that supports Internet of Things devices, has an ineffective size check implemented with `assert()` can lead to buffer overflow in versions up to and including 2025.04. Assertions are usually compiled out in production builds. If assertions are the only defense against untrusted inputs, the software may be exposed to attacks that utilize the lack of proper input checks. In the `l2filter_add()` function shown below, `addr_len` is checked using an assertion and is subsequently used as an argument in a `memcpy()` call. When assertions are disabled, there would be no size check for `addr_len`. As a consequence, if an attacker were to provide an `addr_len` value larger than `CONFIG_L2FILTER_ADDR_MAXLEN`, they can trigger a buffer overflow and write past the `list[i].addr` buffer. If the unchecked input is attacker-controlled, the impact of the buffer overflow can range from a denial of service to arbitrary code execution. Commit f6f7de4ccc107c018630e4c15500825caf02e1c2 contains a patch for the vulnerability.

Exploits (1)

github WRITEUP
by namberino · poc
https://github.com/namberino/cve/tree/main/CVE-2025-53888

The repository provides detailed technical analysis of CVE-2025-46176 and CVE-2025-52079, including firmware extraction, hardcoded credentials, and improper access control in D-Link routers. It includes screenshots and step-by-step breakdowns of the vulnerabilities but lacks functional exploit code.

Classification
Writeup 100%
Attack Type
Auth Bypass
Complexity
Moderate
Reliability
Reliable
Target: D-Link DIR-605L v2.13B01, DIR-816L v2.06B01, DIR-820L 1.06B02
No auth needed
Prerequisites: Firmware access · Network access to the device
devstral-2 · analyzed Feb 27, 2026 Full analysis →

Scores

CVSS v3 9.8
EPSS 0.0068
EPSS Percentile 47.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-120
Status published
Products (1)
riot-os/riot < 2025.04
Published Jul 18, 2025
Tracked Since Feb 18, 2026