CVE-2026-30872 is a critical Stack-based Buffer Overflow vulnerability affecting the mdns daemon in OpenWrt Project versions prior to 24.10.6 and 25.12.1. It is triggered by processing specially crafted IPv6 reverse DNS PTR queries received via multicast DNS on UDP port 5353. This vulnerability carries a CVSS score of 9.8 (Critical) due to its network-based attack vector, low complexity, and potential for unauthenticated remote code execution. Currently, there is no public exploit code, active exploitation, or community discussion reported. Organizations are advised to update affected OpenWrt installations immediately.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 24.10.6CPE matchmatch criteria | cpe:2.3:o:openwrt:openwrt:*:*:*:*:*:*:*:* | ||
>= 25.12.0, < 25.12.1CPE matchmatch criteria | cpe:2.3:o:openwrt:openwrt:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/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.