CVE-2025-71058

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-07 · updated 2026-07-24
Weakness: CWE-94

Description

Dual DHCP DNS Server 8.01 improperly accepts and caches UDP DNS responses without validating that the response originates from a legitimate configured upstream DNS server. The implementation matches responses primarily by TXID and inserts results into the cache, enabling a remote attacker to inject forged responses and poison the DNS cache, potentially redirecting victims to attacker-controlled destinations.

References

https://github.com/FPokerFace/Security-Advisory/blob/main/CVE-2025-71058/poc.c
https://github.com/FPokerFace/Security-Advisory/tree/main/CVE-2025-71058
https://sourceforge.net/projects/dhcp-dns-server/

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