dns cache poisoning

DNS cache poisoning is a class of attack that corrupts the stored results of a DNS resolver, causing it to return incorrect IP addresses for domain names. On WindowsForum.com, discussions center on real-world vulnerabilities such as CVE-2026-2291 in dnsmasq and CVE-2026-42960 in Unbound, both of which can enable cache poisoning in environments where Windows systems rely on these resolvers. The forum content emphasizes that while these bugs may not be headline-grabbing remote-code-execution flaws, they pose a serious operational risk: name resolution becomes unreliable or subtly wrong, leading to misdirected traffic or service disruption. IT teams are advised to patch affected resolvers promptly and to recognize that Microsoft's Security Update Guide may mirror advisories for non-Windows components that underpin Windows-hybrid networks.