CVE-2025-71058
Critical
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.
SeverityCritical
CVSS9.1
Exploit probability—
ProductDual DHCP DNS Server
PublishedApr 7, 2026
First seenApr 7, 2026
Weakness typeCWE-94Code injection
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Dual DHCP DNS Server | 8.01 | — |
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