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:
- Microsoft patches Windows zero-day used by multiple cyber-espionage groups
November 13, 2018
Microsoft released today its monthly roll-up of security patches known as Patch Tuesday. This month, the Redmond-based company has fixed 62 security flaws. Among the 62 fixes, there is also a fix for a zero-day vulnerability that was under active exploitation before today’s patches were made available. The zero-day, tracked as CVE-2018-8589, impacts the Windows Win32k component. Microsoft ...
- Cisco Accidentally Released Dirty Cow Exploit Code in Software
November 8, 2018
Cisco revealed that it had “inadvertently” shipped an in-house exploit code that was used in test scripts as part of its TelePresence Video Communication Server and Expressway Series software. Cisco Systems revealed in a security bulletin Wednesday that it “inadvertently” shipped in-house exploit code that was used in security tests of scripts as part of its ...
- IoT security: Why it will get worse before it gets better
November 7, 2018
There are billions of connected devices in use around the world, in our homes, our offices, even inside our bodies as medical devices are connected to an ever-growing internet of things (IoT). Vendors rush to add to the range of devices available, with many looking to gain a hold in the market as quickly as possible, delivering ...
- Rapidly Growing Router Botnet Takes Advantage of 5-Year-Old Flaw
November 7, 2018
A sophisticated proxy code has infected hundreds of thousands of devices already. A fresh botnet is spreading across the landscape, targeting router equipment. So far, hundreds of thousands of bot endpoints have already been identified, and they’re apparently being marshaled to send out massive amounts of spam. The botnet first emerged in September, according to 360Netlab telemetry, ...
- VirtualBox zero-day published by disgruntled researcher
November 7, 2018
A Russian security researcher has published details about a zero-day vulnerability affecting VirtualBox, an Oracle software application for running virtual machines. According to a text file uploaded on GitHub, Saint Petersburg-based researcher Sergey Zelenyuk has found a chain of bugs that can allow malicious code to escape the VirtualBox virtual machine (the guest OS) and execute ...
- Apache Struts Warns Users of Two-Year-Old Vulnerability
November 6, 2018
Users must update their vulnerable libraries manually. The Apache Software Foundation warned in an advisory that the latest version of the Commons FileUpload library is susceptible to a two-year-old remote code execution flaw. Users of the vulnerable library must update their projects manually. The critical bug in Commons FileUpload library is a known vulnerability (CVE-2016-1000031) that enables ...