Blog.0Patch Micropatches for Critical Windows DNS Vulnerability CVE-2026-62878 Released
Article Content
- •CVE-2026-62878 is a critical RCE vulnerability in Windows DNS Server with CVSS 9.8.
- •0patch provides micropatches for unsupported Windows Server versions 2008 R2, 2012, and 2012 R2.
- •The vulnerability allows unauthenticated remote code execution via stack-based buffer overflow.
0patch has released micropatches for CVE-2026-62878, a critical remote code execution vulnerability in Windows DNS Server. This flaw allows unauthenticated attackers to execute arbitrary code remotely, affecting legacy systems such as Windows Server 2008 R2, 2012, and 2012 R2, which no longer receive Microsoft updates. The vulnerability was published on August 11, 2026, with a CVSS score of 9.8, indicating its critical nature. Microsoft addressed the issue in August by limiting query recursion nesting depth, but 0patch has provided additional support for older systems. The micropatches can be applied without requiring a system reboot. Security researchers have confirmed the vulnerability through proof-of-concept code. Organizations using affected systems are advised to apply the micropatches to mitigate risks.
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