CVE-2026-49169
HighCVSS 8.0Exploitation Probability (EPSS)
Low risk39th percentile - higher than 39% of all known CVEs
Summary
Use-After-Free vulnerability in DNS Server allows an authorized attacker to execute code remotely over the network. The issue stems from improper memory management when processing specially crafted DNS queries.
Risk Assessment
An attacker could take control of the DNS server, leading to potential network traffic interception, data leakage, or further escalation within the infrastructure.
Recommendation
Apply the security update provided by the operating system or DNS software vendor immediately. If a patch is unavailable, restrict DNS server access to trusted networks only.
Other vulnerabilities in DNS Server
See all- CVE-2026-88116High
Untrusted pointer dereference in DNS Server allows an unauthorized attacker to execute code over a network.
- CVE-2026-88114High
Untrusted pointer dereference in DNS Server allows an unauthorized attacker to execute code over a network.
- CVE-2026-96113Critical
A heap-based buffer overflow in DNS Server allows an unauthorized attacker to execute code over a network. The vulnerability stems from improper memory handling during DNS query processing.
- CVE-2026-83869Critical
Integer underflow (wrap or wraparound) in DNS Server allows an unauthorized attacker to execute code over a network.
- CVE-2016-3227Critical
A use-after-free vulnerability in the DNS Server component in Microsoft Windows Server 2012 Gold and R2 allows remote attackers to execute arbitrary code via crafted requests.
- CVE-2026-69989High
Use after free in DNS Server allows an unauthorized attacker to execute code over a network.
- CVE-2026-69827High
Concurrent execution using shared resource with improper synchronization ('race condition') in DNS Server allows an unauthorized attacker to execute code over a network.
- CVE-2026-69782High
Race condition in DNS Server allows an unauthorized attacker to execute code over a network.
- CVE-2026-50426Medium
Relative path traversal vulnerability in DNS Server allows an authorized attacker to execute code over an adjacent network.
- CVE-2026-42000Medium
Insufficient validation of names during AXFR (DNS zone transfer) may allow an attacker to inject malicious or malformed data.
Original NVD description (English source)
Use after free in DNS Server allows an authorized attacker to execute code over a network.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS