Newly disclosed vulnerability Common Vulnerabilities and Exposures (CVE)-2026-24858 [Common Weakness Enumeration (CWE)-288: Authentication Bypass Using an Alternate Path or Channel] allows malicious actors with a FortiCloud account and a registered device to log in to separate devices registered to other users in FortiOS, FortiManager, FortiWeb, FortiProxy, and FortiAnalyzer, if FortiCloud single sign on (SSO) is enabled on devices.
Users are vulnerable to CVE-2026-24858 even if they updated Fortinet devices to address previously disclosed FortiCloud SSO bypass vulnerabilities CVE-2025-59718 and CVE-2025-59719 [CWE-347: Improper Verification of Cryptographic Signature]. CVE-2025-59718 and CVE-2025-59719 affect FortiOS, FortiWeb, FortiProxy, and FortiSwitch Manager, and allow malicious actors to bypass the SSO login authentication via a crafted Security Assertion Markup Language (SAML) message.
Read more…
Source: U.S. Cybersecurity and Infrastructure Security Agency
Sign up for the Cyber Security Review Newsletter
The latest cyber security news and insights delivered right to your inbox
Related:
- Two Birds With One Stone: An Introduction To V8 And JIT Exploitation
December 7, 2021
In this special blog series, ZDI Vulnerability Researcher Hossein Lotfi looks at the exploitation of V8 – Google’s open-source high-performance JavaScript and WebAssembly engine – through the lens of a bug used during Pwn2Own Vancouver 2021. The contest submission from Bruno Keith and Niklas Baumstark exploited both Google Chrome and Microsoft Edge (Chromium) with the ...
- Vulnerabilities Exploited for Monero Mining Malware Delivered via GitHub, Netlify
December 3, 2021
Earlier this year, a security flaw identified as CVE-2021-41773 was disclosed to Apache HTTP Server Project, a path traversal and remote code execution (RCE) flaw in Apache HTTP Server 2.4.49. If this vulnerability is exploited, it allows attackers to map URLs to files outside the directories configured by Alias-like directives. Under certain configurations where Common ...
- Vulnerability Spotlight: Use-after-free condition in Google Chrome could lead to code execution
December 2, 2021
Cisco Talos recently discovered an exploitable use-after-free vulnerability in Google Chrome. Google Chrome is a cross-platform web browser — and Chromium is the open-source version of the browser that other software developers use to build their browsers, as well. This specific vulnerability exists in Blink, the main DOM parsing and rendering engine at the core of ...
- Unpatched HiveNightmare/SeriousSAM Windows Zero-Day Allows Privileged File Access
November 29, 2021
An unpatched Windows security vulnerability could allow information disclosure and local privilege escalation (LPE), researchers have warned. The issue (CVE-2021-24084) has yet to get an official fix, making it a zero-day bug – but a micropatch has been rolled out as a stop-gap measure. Security researcher Abdelhamid Naceri originally reported the vulnerability as an information-disclosure issue ...
- Attackers Actively Target Windows Installer Zero-Day
November 24, 2021
Attackers are actively exploiting a Windows Installer zero-day vulnerability that was discovered when a patch Microsoft issued for another security hole inadequately fixed the original and unrelated problem. Over the weekend, security researcher Abdelhamid Naceri discovered a Windows Installer elevation-of-privilege vulnerability tracked as CVE-2021-41379 that Microsoft patched a couple of weeks ago as part of its ...
- Attackers Hijack Email Threads Using ProxyLogon/ProxyShell Flaws
November 22, 2021
Attackers are gnawing on the ProxyLogon and ProxyShell vulnerabilities in Microsoft Exchange Server to hijack email chains, by malspamming replies to ongoing email threads, researchers say. What’s still under discussion: whether the offensive is delivering SquirrelWaffle, the new email loader that showed up in September, or whether SquirrelWaffle is just one piece of malware among several ...