# CVE-2026-30872: OpenWrt Project is a Linux operating system targeting embedded devices. In versions prior to 24.10.6 and 25.12.1, the…

Source: https://junglewise.ai/threats/cve-2026-30872-openwrt-project-is-a-linux-operating-system-targeting-embedded  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-03-19  
License: CC BY 4.0 with a link back

CVE-2026-30872 · Severity: critical · CVSS 9.8 · Published 2026-03-19

OpenWrt Project is a Linux operating system targeting embedded devices. In versions prior to 24.10.6 and 25.12.1, the mdns daemon has a Stack-based Buffer Overflow vulnerability in the match_ipv6_addresses function, triggered when processing PTR queries for IPv6 reverse DNS domains (.ip6.arpa) received via multicast DNS on UDP port 5353. During processing, the domain name from name_buffer is copied via strcpy into a fixed 256-byte stack buffer, and then the reverse IPv6 request is extracted into a buffer of only 46 bytes (INET6_ADDRSTRLEN). Because the length of the data is never validated before this extraction, an attacker can supply input larger than 46 bytes, causing an out-of-bounds write. This allows a specially crafted DNS query to overflow the stack buffer in match_ipv6_addresses, potentially enabling remote code execution. This issue has been fixed in versions 24.10.6 and 25.12.1.

Technologies: [OpenWrt](https://junglewise.ai/threats/technologies/openwrt). Vendors: [OpenWrt](https://junglewise.ai/threats/vendors/openwrt).

## Quick answers

**Is CVE-2026-30872 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-30872 being exploited in the wild.

**How severe is CVE-2026-30872?** Critical severity, with a CVSS score of 9.8, published 19 March 2026.

**Which products and versions are affected?** OpenWrt. The advisory does not name versions.

**Is there a fix for CVE-2026-30872?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2026-30872?** Check whether you run OpenWrt. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- OpenWrt

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