CVE-2026-19735

The Zephyr TCP stack contains a vulnerability where the RFC 6528 initial-sequence-number (ISN) implementation may use predictable values. If the sys_csrand_get() call fails during early boot (e.g., due to -ENODEV or -EIO from the entropy driver), the system fails to catch the error and leaves the...

CVE-2026-19735 Predictable TCP initial sequence numbers when the RFC 6528 secret key generation fails silently in the Zephyr TCP stack

The RFC 6528 initial-sequence-number implementation in subsys/net/ip/tcp.c derived every TCP ISN from SHA-256uniquekey || four-tuple plus a uptime-derived offset, where uniquekey is a 128-bit secret filled once by syscsrandget. The return value of that call was discarded and the once guard was...

CVE-2026-88778

Citrix NetScaler ADC and NetScaler Gateway are vulnerable to a TCP Initial Sequence Number (ISN) prediction flaw. The issue affects appliances with TCP-based virtual servers (such as HTTP, SSL, or TCP) where Enhanced ISN Generation is disabled. This vulnerability allows for predictable sequence n...

CVE-2026-62647

A vulnerability has been identified in Reyrolle 7SR5 All versions V2.70. A random number generator is used to generate security-relevant values such as session identifiers used for authentication purposes that is not initialized with a True Random Number Generator TRNG, resulting in a predictable...

CVE-2026-62647

A vulnerability has been identified in Reyrolle 7SR5 All versions V2.70. A random number generator is used to generate security-relevant values such as session identifiers used for authentication purposes that is not initialized with a True Random Number Generator TRNG, resulting in a predictable...

Oracle Linux 8 : edk2 (ELSA-2026-36721)

The remote Oracle Linux 8 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-36721 advisory. - Resolves: RHEL-115901 CVE-2025-9230 edk2: Out-of-bounds read & write in RFC 3211 KEK Unwrap rhel-8.10.z - Resolves: RHEL-60830 CVE-2024-38796 edk2: Integer...

EUVD-2008-6527

Malware in sbrugna...

EUVD-2007-3367

Malware in sbrugna...

OESA-2024-2301 edk2 security update

EDK II is a modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications. Security Fixes: EDK2's Network Package is susceptible to a predictable TCP Initial Sequence Number. This vulnerability can be exploited by an attacker to gain unauthorized access...

edk2: Predictable TCP Initial Sequence Numbers

A security flaw has been identified in EDK2, the open-source reference implementation of the UEFI specification. This vulnerability enables an unauthorized attacker to potentially disclose sensitive information...

SUSE CVE-2023-45236

EDK2's Network Package is susceptible to a predictable TCP Initial Sequence Number. This vulnerability can be exploited by an attacker to gain unauthorized access and potentially lead to a loss of Confidentiality...

AZL-39220 CVE-2023-45237 affecting package edk2 for versions less than 20230301gitf80f052277c8-40

EDK2's Network Package is susceptible to a predictable TCP Initial Sequence Number. This vulnerability can be exploited by an attacker to gain unauthorized access and potentially lead to a loss of Confidentiality...

AZL-39388 CVE-2023-45236 affecting package hvloader for versions less than 1.0.1-3

EDK2's Network Package is susceptible to a predictable TCP Initial Sequence Number. This vulnerability can be exploited by an attacker to gain unauthorized access and potentially lead to a loss of Confidentiality...

UBUNTU-CVE-2023-45236

EDK2's Network Package is susceptible to a predictable TCP Initial Sequence Number. This vulnerability can be exploited by an attacker to gain unauthorized access and potentially lead to a loss of Confidentiality...

PT-2023-8395

Name of the Vulnerable Software and Affected Versions EDK2 affected versions not specified Description The EDK2's Network Package is susceptible to a predictable TCP Initial Sequence Number, which can be exploited by an attacker to gain unauthorized access and potentially lead to a loss of...

K3126: Large TCP window sizes may make it easier to predict sequence numbers vulnerability CVE-2004-0230

Security Advisory Description Note : For information about signing up to receive security notice updates from F5, refer to K9970: Subscribing to email notifications regarding F5 products. Note : Versions that are not listed in this article have not been evaluated for vulnerability to this securit...

SUSE CVE-1999-0077

Predictable TCP sequence numbers allow spoofing...

CVE-2022-27577: Predictable Exact Value from Previous Values

The vulnerability in the MSC800 in all versions before 4.15 allows for an attacker to predict the TCP initial sequence number. When the TCP sequence is predictable, an attacker can send packets that are forged to appear to come from a trusted computer. These forged packets could compromise servic...

CVE-2020-27632: Undefined Security Weakness

In SIMATIC MV400 family versions prior to v7.0.6, the ISN generator is initialized with a constant value and has constant increments. An attacker could predict and hijack TCP sessions...

Mitsubishi Electric MELSEC iQ-F Predictable TCP Sequence Number Remote Code Execution Vulnerability

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Mitsubishi Electric MELSEC iQ-F. Authentication is not required to exploit this vulnerability. The specific flaw exists within the processing of ACK packets. When generating ACK packets, the...