CVE-2025-66647 is a critical buffer overflow vulnerability in the IPv6 fragmentation reassembly implementation of RIOT OS v2025.07, an open-source microcontroller operating system for IoT and embedded devices. An attacker can exploit this by sending specially crafted IPv6 packets, leading to memory corruption and potentially remote code execution. With a CVSS score of 9.8 (CRITICAL), this vulnerability is remotely exploitable with low attack complexity and no user interaction required, allowing for full confidentiality, integrity, and availability impact. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion with 10 mentions, indicating awareness. RIOT OS v2025.10 fixes this issue.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 2025.10CPE matchmatch criteria | cpe:2.3:o:riot-os:riot:*:*:*:*:*:*:*:* | ||
2025.10CPE matchmatch criteria | cpe:2.3:o:riot-os:riot:2025.10:rc1:*:*:*:*:*:* | ||
2025.10CPE matchmatch criteria | cpe:2.3:o:riot-os:riot:2025.10:rc2:*:*:*:*:*:* | ||
2025.10CPE matchmatch criteria | cpe:2.3:o:riot-os:riot:2025.10:rc3:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.