Is there a public exploit for CVE-2026-30872?

No public exploit for CVE-2026-30872 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-30872?

CVE-2026-30872 scores CVSS 9.5 (v4.0), rated critical. EPSS puts the chance of exploitation in the next 30 days at 2.31%.

What does CVE-2026-30872 affect?

CVE-2026-30872 affects OpenWRT OpenWRT.

9.5 Critical

OpenWrt Project is a Linux operating system targeting embedded devices.

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 mdns daemon has a Stack-based Buffer Overflow vulnerability in the matchipv6addresses 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 namebuffer 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 (INET6ADDRSTRLEN). 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 matchipv6addresses, potentially enabling remote code execution. This issue has been fixed in versions 24.10.6 and 25.12.1.

Assessment

CVSS: 9.5 (v4.0)
Severity: Critical
EPSS: 2.31% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 19 March 2026
Last updated: 3 November 2026
Affected: OpenWRT · OpenWRT
Assigner: GitHub_M

CVSS vectorCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

At the source

EUVD (ENISA)

References

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