VulnRadar

Data against noise.

Page generated: 08 Nov 2026, 14:51 UTC

CVE-2026-24858

Read full description

An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability in Fortinet FortiAnalyzer 7.6.0 through 7.6.5, FortiAnalyzer 7.4.0 through 7.4.9, FortiAnalyzer 7.2.0 through 7.2.11, FortiAnalyzer 7.0.0 through 7.0.15, FortiManager 7.6.0 through 7.6.5, FortiManager 7.4.0 through 7.4.9, FortiManager 7.2.0 through 7.2.11, FortiManager 7.0.0 through 7.0.15, FortiNAC-F 7.6.3 through 7.6.5, FortiOS 7.6.0 through 7.6.5, FortiOS 7.4.0 through 7.4.10, FortiOS 7.2.0 through 7.2.12, FortiOS 7.0.0 through 7.0.18, FortiProxy 7.6.0 through 7.6.4, FortiProxy 7.4.0 through 7.4.12, FortiProxy 7.2.0 through 7.2.15, FortiProxy 7.0.0 through 7.0.22, FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11 may allow an attacker with a FortiCloud account and a registered device to log into other devices registered to other accounts, if FortiCloud SSO authentication is enabled on those devices.

CVSS 9.4 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE

0.0/10

REALITY · THREAT PRIORITY

8.8/10

General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?

Recorded exploitation baseline: +7.00
Technical severity: CVSS 9.4: +1.41
Fresh EPSS: 86.59%: +0.43

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 23 documents and public datasets.

Hype components

Headline sample (25%)

0/100

Press, 30 days (60%)

0/100

Grounded branding (15%)

0/100

HYPE TOTAL0/100

Sources and documents

GreyNoise

Press · 20 Apr 2026, 07:00 · The Internet Changes Before the Advisory Drops - GreyNoise

CyberSecurityNews

Press · 15 Mar 2026, 07:00 · FortiGate Firewalls Exploited in Wave of Attacks to Breach Networks and Steal Credentials - CyberSecurityNews

The Hacker News

Press · 10 Mar 2026, 07:00 · FortiGate Devices Exploited to Breach Networks and Steal Service Account Credentials - The Hacker News

SOC Prime

Press · 10 Feb 2026, 08:00 · CVE-2026-21643: Critical FortiClient EMS Vulnerability Enables Unauthenticated Remote Code Execution - SOC Prime

Kaspersky

Press · 05 Feb 2026, 08:00 · SIEM Rules for detecting exploitation of vulnerabilities in FortiCloud SSO - Kaspersky

See all 23 source documents

CyberSecurityNews

Press · 30 Jan 2026, 08:00 · 3,280,081 Fortinet Devices Online With Exposed Web Properties Under Risk - CyberSecurityNews

Cybersecurity Dive

Press · 29 Jan 2026, 08:00 · CISA, security researchers warn FortiCloud SSO flaw is under attack - Cybersecurity Dive

CyberSecurityNews

Press · 28 Jan 2026, 08:00 · Fortinet Confirms Critical FortiCloud SSO Vulnerability(CVE-2026-24858) Actively Exploited in the Wild - CyberSecurityNews

SOCRadar

Press · 28 Jan 2026, 08:00 · CVE-2026-24858: Patch Released for Fortinet FortiOS SSO Auth - SOCRadar

CyberScoop

Press · 28 Jan 2026, 08:00 · Fortinet’s latest zero-day vulnerability carries frustrating familiarities for customers - CyberScoop

SC Media

Press · 28 Jan 2026, 08:00 · Actively exploited Fortinet FortiCloud zero-day patched - SC Media

Cyber Daily

Press · 28 Jan 2026, 08:00 · Update now! Fortinet discloses actively exploited critical flaw in FortiOS, FortiManager, and FortiAnalyzer - Cyber Daily

SecurityWeek

Press · 28 Jan 2026, 08:00 · Fortinet Patches Exploited FortiCloud SSO Authentication Bypass - SecurityWeek

Dark Reading

Press · 28 Jan 2026, 08:00 · Fortinet Confirms New Zero-Day Behind Malicious SSO Logins - Dark Reading

Help Net Security

Press · 28 Jan 2026, 08:00 · Fortinet starts patching exploited FortiCloud SSO zero-day (CVE-2026-24858) - Help Net Security

The Register

Press · 28 Jan 2026, 08:00 · Fortinet SSO patch bypass gets a separate critical CVE - The Register

CCB Belgium

Press · 28 Jan 2026, 08:00 · Warning: Actively exploited 0-day critical vulnerability in FortiOS, FortiManager and FortiAnalyzer, Patch Immediately! - CCB Belgium

Security Affairs

Press · 28 Jan 2026, 08:00 · Fortinet patches actively exploited FortiOS SSO auth bypass (CVE-2026-24858) - Security Affairs

SOC Prime

Press · 28 Jan 2026, 08:00 · CVE-2026-24858: FortiOS SSO Zero-Day Exploited in the Wild - SOC Prime

The Hacker News

Press · 28 Jan 2026, 08:00 · Fortinet Patches CVE-2026-24858 After Active FortiOS SSO Exploitation Detected - The Hacker News

BleepingComputer

Press · 27 Jan 2026, 08:00 · Fortinet blocks exploited FortiCloud SSO zero day until patch is ready - BleepingComputer

Arctic Wolf

Press · 27 Jan 2026, 08:00 · Recommendations for CVE-2026-24858 - Arctic Wolf

Rapid7

Press · 17 Dec 2025, 08:00 · Critical vulnerabilities in Fortinet CVE-2025-59718, CVE-2025-59719 exploited in the wild - Rapid7

Score evolution

● Hype ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.8 (2026-11-02 15:14). The curve appears once the score changes.

Public exploit evidence

Public exploit entries / repo candidates

Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence: Exploitation recorded
Priority basis: Recorded exploitation; CVSS 9.4; EPSS 86.6%
Attention, last 30 days: 0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential: network access, no prior privileges, no user interaction.
Observed activity: Exploitation recorded in CISA KEV.
Known scale: Not quantified.
Evidence confidence basis: Trusted exploitation confirmation

Score evaluated: 2026-11-05 14:00:03.483954+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline

First press mention

17 Dec 2025, 08:00

Added to the CISA KEV catalog

27 Jan 2026, 00:00

Published

27 Jan 2026, 19:18

Latest press mention

20 Apr 2026, 07:00

Score calculated

05 Nov 2026, 14:00