CVE-2026-24858

rative interfaces and SSL-VPN gateways; this post maps eight Fortinet CVEs with associated Qualys detections, including CVE-2026-24858, CVE-2025-59718, and CVE-2025-59719. Large-scale credential-abuse activity has been publicly reported, and Fortinet confirmed credential reuse , brute-force activity, and prior exploitation of earlier FortiCloud SSO iss

A database of over 86,000 confirmed working credentials was created during the credential-harvesting campaign.

nsights The Internet Changes Before the Advisory Drops GreyNoise April 20, 2026 Before Cisco published its advisory for CVE-2026-20127 — a CVSS 10.0 zero-day cited in a Five Eyes joint warning — GreyNoise sensors had already observed eight distinct surges of Cisco-targeting activity. The earliest arrived 39 days before disclosure. Each one came closer

Attackers are exploiting FortiGate devices to breach networks and steal configuration data containing service account credentials and network details. SentinelOne researchers warn that attackers are exploiting vulnerabilities or weak credentials in FortiGate devices to gain initial access to corporate networks. Once inside, they extract configuration files that may contain service account credentials and information about […]

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds a flaw in BeyondTrust RS and PRA to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added an BeyondTrust RS and PRA vulnerability, tracked as CVE-2026-1731 (CVSS score of 9.9), to its Known Exploited Vulnerabilities (KEV) catalog. This week BeyondTrust released security updates to […]

For the latest discoveries in cyber research for the week of 2nd February, please download our Threat Intelligence Bulletin. TOP ATTACKS AND BREACHES MicroWorld Technologies, maker of eScan antivirus, has suffered a supply-chain compromise. Malicious updates were pushed via the legitimate eScan updater, delivering multi-stage malware that establishes persistence, enables remote access, and blocks automatic […]

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Here’s an overview of some of last week’s most interesting news, articles, interviews and videos: When open science meets real-world cybersecurity In this Help Net Security interview, Matthew Kwiatkowski, CISO at Fermilab, America’s particle physics and accelerator laboratory, discusses where cybersecurity blind spots emerge, why availability can outweigh confidentiality, and how security teams protect complex, legacy-driven research infrastructure while supporting scientific progress. Inside Microsoft’s veteran-to-tech workforce pipeline In this Help Net Security interview, Chris Cortez, … More →

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds a flaw in Ivanti EPMM to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added an Ivanti EPMM vulnerability, tracked as CVE-2026-1281 (CVSS score of 9.8), to its Known Exploited Vulnerabilities (KEV) catalog. The vulnerability is a code injection that impacts Ivanti Endpoint Manager […]

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds a flaw in multiple Fortinet products to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added a Broadcom VMware vCenter Server vulnerability, tracked as CVE-2026-24858 (CVSS score of 9.4), to its Known Exploited Vulnerabilities (KEV) catalog. This week, Fortinet started rolling out patches for […]

Fortinet released fixes for a critical FortiOS SSO auth bypass (CVE-2026-24858) actively exploited, impacting FortiOS, FortiManager, and FortiAnalyzer. Fortinet started rolling out patches for a critical FortiOS flaw under active attack. The bug, CVE-2026-24858 (CVSS score of 9.4), lets attackers bypass authentication via SSO. It affects FortiOS, FortiManager, and FortiAnalyzer, while Fortinet checks if other […]

Fortinet has disclosed a critical authentication bypass zero-day vulnerability affecting its FortiCloud single sign-on feature after the company took the emergency step of temporarily disabling the cloud authentication service globally to stop active exploitation. The US Cybersecurity and Infrastructure Security Agency added the vulnerability to its Known Exploited Vulnerabilities catalog the same day. The vulnerability, […]

Tracked as CVE-2026-24858, the bug allows attackers to log into devices registered to other FortiCloud accounts.

Fortinet has begun releasing FortiOS versions that fix CVE-2026-24858, a critical zero-day vulnerability that allowed attackers to log into targeted organizations’ FortiGate firewalls. “This vulnerability was found being exploited in the wild by two malicious FortiCloud accounts, which were locked out on [January 22, 2026],” the company shared. About CVE-2026-24858 On January 20, several Fortinet customers revealed that attackers gained access to their FortiGate firewalls and created new local admin accounts despite the devices running … More →

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