CVE-2026-25791 Sliver has a DNS C2 OTP Bypass Allows Unauthenticated Session Flooding and Denial of Service

Sliver is a command and control framework that uses a custom Wireguard netstack. Prior to 1.7.0, the DNS C2 listener accepts unauthenticated TOTP bootstrap messages and allocates server-side DNS sessions without validating OTP values, even when EnforceOTP is enabled. Because sessions are stored...

CVE-2026-25791

Sliver (CVE-2026-25791) reports a DNS C2 OTP bypass where the DNS listener accepts unauthenticated TOTP bootstrap messages and allocates sessions without OTP validation, even with EnforceOTP enabled. This allows unauthenticated remote session creation leading to memory exhaustion and denial of se...

CVE-2026-0398

PowerDNS Recursor is affected by CVE-2026-0398. The issue involves crafted DNS zones that can cause increased resource usage and crafted CNAME chains that can lead to cache poisoning in the Recursor. The available documents do not specify affected versions, exact root cause in code paths, or offi...

CVE-2026-2143

A security vulnerability has been detected in D-Link DIR-823X 250416. This issue affects some unknown processing of the file /goform/setddns of the component DDNS Service. The manipulation of the argument ddnsType/ddnsDomainName/ddnsUserName/ddnsPwd leads to os command injection. The attack is...

Sliver 资源管理错误漏洞

Sliver is an open-source, cross-platform opponent simulation/red team framework developed by Bishop Fox. It can be used by organizations of various sizes for security testing. Versions of Sliver prior to 1.7.0 contained a resource management vulnerability. This vulnerability stemmed from the DNS ...

EUVD-2026-5805

A security vulnerability has been detected in D-Link DIR-823X 250416. This issue affects some unknown processing of the file /goform/setddns of the component DDNS Service. The manipulation of the argument ddnsType/ddnsDomainName/ddnsUserName/ddnsPwd leads to os command injection. The attack is...

D-Link DIR-823X 操作系统命令注入漏洞

The D-Link DIR-823X is a wireless router produced by D-Link Corporation. The D-Link DIR-823X 250416 version has a vulnerability related to operating system command injection. This vulnerability stems from incorrect operations on the parameters ddnsType, ddnsDomainName, ddnsUserName, and ddnsPwd i...

[SECURITY] Fedora 42 Update: bind-9.18.44-1.fc42

BIND Berkeley Internet Name Domain is an implementation of the DNS Domain Name System protocols. BIND includes a DNS server named, which resolves host names to IP addresses; a resolver library routines for applications to use when interfacing with DNS; and tools for verifying that the DNS server ...

Missing Authentication for Critical Function

Overview Affected versions of this package are vulnerable to Missing Authentication for Critical Function via the handleHello process. An attacker can exhaust system memory and disrupt service availability by repeatedly sending unauthenticated DNS queries that trigger unbounded session allocation...

Missing Authentication for Critical Function

Overview Affected versions of this package are vulnerable to Missing Authentication for Critical Function via the handleHello process. An attacker can exhaust system memory and disrupt service availability by repeatedly sending unauthenticated DNS queries that trigger unbounded session allocation...

Sliver has DNS C2 OTP Bypass that Allows Unauthenticated Session Flooding and Denial of Service

Summary The DNS C2 listener accepts unauthenticated TOTP bootstrap messages and allocates server-side DNS sessions without validating OTP values, even when EnforceOTP is enabled. Because sessions are stored without a cleanup/expiry path in this flow, an unauthenticated remote actor can repeatedly...

Missing Authentication for Critical Function

Overview Affected versions of this package are vulnerable to Missing Authentication for Critical Function via the handleHello process. An attacker can exhaust system memory and disrupt service availability by repeatedly sending unauthenticated DNS queries that trigger unbounded session allocation...

GHSA-WXRW-GVG8-FQJP Sliver has DNS C2 OTP Bypass that Allows Unauthenticated Session Flooding and Denial of Service

Summary The DNS C2 listener accepts unauthenticated TOTP bootstrap messages and allocates server-side DNS sessions without validating OTP values, even when EnforceOTP is enabled. Because sessions are stored without a cleanup/expiry path in this flow, an unauthenticated remote actor can repeatedly...

Missing Authentication for Critical Function

Overview Affected versions of this package are vulnerable to Missing Authentication for Critical Function via the handleHello process. An attacker can exhaust system memory and disrupt service availability by repeatedly sending unauthenticated DNS queries that trigger unbounded session allocation...

Missing Authentication for Critical Function

Overview Affected versions of this package are vulnerable to Missing Authentication for Critical Function via the handleHello process. An attacker can exhaust system memory and disrupt service availability by repeatedly sending unauthenticated DNS queries that trigger unbounded session allocation...

PT-2026-6972

Name of the Vulnerable Software and Affected Versions Sliver versions prior to 1.7.0 Description The DNS command and control C2 listener accepts unauthenticated Time-based One-Time Password TOTP bootstrap messages and allocates server-side DNS sessions without validating the OTP values, even when...

CVE-2020-37119

Nsauditor 3.0.28 and 3.2.1.0 contains a buffer overflow vulnerability in the DNS Lookup tool that allows attackers to execute arbitrary code by overwriting memory. Attackers can craft a malicious DNS query payload to trigger a three-byte overwrite, bypass ASLR, and execute shellcode through a...

CVE-2020-37119

Nsauditor 3.0.28 and 3.2.1.0 contains a buffer overflow vulnerability in the DNS Lookup tool that allows attackers to execute arbitrary code by overwriting memory. Attackers can craft a malicious DNS query payload to trigger a three-byte overwrite, bypass ASLR, and execute shellcode through a...

CVE-2020-37119 Nsauditor 3.2.1.0 - Buffer Overflow (SEH+ASLR bypass (3 bytes overwrite))

Nsauditor 3.0.28 and 3.2.1.0 contains a buffer overflow vulnerability in the DNS Lookup tool that allows attackers to execute arbitrary code by overwriting memory. Attackers can craft a malicious DNS query payload to trigger a three-byte overwrite, bypass ASLR, and execute shellcode through a...

CVE-2020-37119 Nsauditor 3.2.1.0 - Buffer Overflow (SEH+ASLR bypass (3 bytes overwrite))

Nsauditor 3.0.28 and 3.2.1.0 contains a buffer overflow vulnerability in the DNS Lookup tool that allows attackers to execute arbitrary code by overwriting memory. Attackers can craft a malicious DNS query payload to trigger a three-byte overwrite, bypass ASLR, and execute shellcode through a...