dovecot: Dovecot: Denial of Service in ManageSieve login process

A flaw was found in Dovecot. An unauthenticated attacker can crash the ManageSieve login process by sending a small malformed command before authenticating. This can lead to a denial of service for Sieve script management, affecting either the attacker's connection or all connections handled by t...

CVE-2025-5777

CVE-2025-5777 AKA CitrixBleed 2 Is an OOB read in the login process of Citrix Gateway. This is a Proof of Concept exploiting the OOB CVE-2025-5777 to obtain memory data from a vulnerable Citrix Gateway instance, possibly leading to cookies/credentials theft. Usage I highly recommend using a venv...

CVE-2021-43650

CVE-2021-43650 Webrun = 3.6.0.42 SQLi Description Webrun is a web-based management application. In version 3.6.0.42 it was possible to identify and report a SQL Injection vulnerability that occurs during the login process, more specifically we will inject the payload in the POST parameter called...

CVE-2021-33044

CVE-2021-33044 Dahua IPC/VTH/VTO devices auth bypass exploit About: The identity authentication bypass vulnerability found in some Dahua products during the login process. Attackers can bypass device identity authentication by constructing malicious data packets. use - python3 dahuaexploit.py...

CVE-2021-33044

CVE-2021-33044 Exploit de omisión de autenticación en dispositivos Dahua IPC/VTH/VTO Acerca de: La vulnerabilidad de omisión de autenticación de identidad encontrada en algunos productos Dahua durante el proceso de inicio de sesión. Los atacantes pueden omitir la autenticación de identidad del...

CVE-2017-7921-EXPLOIT

CVE-2017-7921 - Hikvision カメラシリーズにおける不適切な認証の脆弱性 CVE-2017-7921 として識別されるセキュリティ上の欠陥で、Hikvision カメラのさまざまなモデルに影響を与えます。この脆弱性は、DS-2CD2xx2F-I シリーズ（V5.2.0 build 140721 から V5.4.0 build 160530）、DS-2CD2xx0F-I シリーズ（V5.2.0 build 140721 から V5.4.0 Build 160401）、DS-2CD2xx2FWD シリーズ（V5.3.1 build 150410 から V5.4.4...

Critical Check Point Management Flaw Lets Unauthenticated Attackers Run Code as Root

A critical vulnerability in Check Point's Security Management and Log Servers could allow an attacker without login credentials to run code as root on those servers over the network. The Security Management Server is the system that controls firewall policy and administrator access. Check Point h...

EUVD-2026-80699

A stack overflow during the unauthenticated login process may allow an attacker to run arbitrary code remotely with root privileges...

CVE-2026-91843

CheckPoint Security Management and Log Servers are affected by a stack overflow in the unauthenticated login process , which may allow a remote attacker to execute arbitrary code with root privileges . The vulnerability is rated CVSS 9.8 (Critical) with a network attack vector requiring no privil...

CVE-2026-91843 Stack overflow in login process to the Security Management and Log Servers

A stack overflow during the unauthenticated login process may allow an attacker to run arbitrary code remotely with root privileges...

CVE-2026-91843 - Stack overflow in login process to the Security Management and Log Servers

Symptoms - Issue: A stack overflow during the unauthenticated login process may allow an attacker to run arbitrary code remotely with root privileges. This issue received the ID CVE-2026-91843 and a CVSS score of 9.8. Affected Products: Security Management Server, Multi-Domain Security Management...

Astra Linux – Vulnerability in xrdp

xrdp is an open-source RDP server. Versions up to 0.10.5 contain a heap-based buffer overflow vulnerability in its login process. In environments where domainuserseparator is configured in xrdp.ini, an unauthenticated remote attacker can send a crafted, excessively long username and domain name,...

CVE-2026-42395

A flaw was found in Dovecot. A remote attacker, if able to send forwarding information from a host configured as a trusted proxy, could send a NUL byte that crashes the login process. This termination of the login process can lead to a denial of service for user logins. Mitigation To mitigate thi...

SUSE CVE-2026-42395

A host listed as a trusted proxy can send forwarding information containing a NUL byte, which crashes the login process on the following login attempt. The login process is terminated, which can cause degradation or denial of service for logins. Deployments that do not configure trusted proxies a...

Linux Distros Unpatched Vulnerability : CVE-2026-42395

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A host listed as a trusted proxy can send forwarding information containing a NUL byte, which crashes the login process on the following login attempt. The logi...

Linux Distros Unpatched Vulnerability : CVE-2026-52687

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - An attacker that has valid credentials can select a compression algorithm for the IMAP connection whose decompression state requires a large amount of memory, a...

CVE-2026-42395

A host listed as a trusted proxy can send forwarding information containing a NUL byte, which crashes the login process on the following login attempt. The login process is terminated, which can cause degradation or denial of service for logins. Deployments that do not configure trusted proxies a...

ALPINE-CVE-2026-42395

A host listed as a trusted proxy can send forwarding information containing a NUL byte, which crashes the login process on the following login attempt. The login process is terminated, which can cause degradation or denial of service for logins. Deployments that do not configure trusted proxies a...

AZL-98265 CVE-2026-42395 affecting package dovecot 2.3.20-1

A host listed as a trusted proxy can send forwarding information containing a NUL byte, which crashes the login process on the following login attempt. The login process is terminated, which can cause degradation or denial of service for logins. Deployments that do not configure trusted proxies a...

AZL-98259 CVE-2026-33605 affecting package dovecot 2.3.20-1

An unauthenticated attacker can crash the ManageSieve login process by sending a small malformed command before authenticating. If running in high-security mode default for community releases, only the attacker's own connection is terminated. If running in high-performance mode default for Pro...