CVE-2026-22153

Description

An Authentication Bypass by Primary Weakness vulnerability [CWE-305] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4 may allow an unauthenticated attacker to bypass LDAP authentication of Agentless VPN or FSSO policy, when the remote LDAP server is configured in a specific way.

Overview

State: PUBLISHED
Assigner (CNA): fortinet
CVSS severity: HIGH
CVSS score: 7.5 / 10
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
Effective score: 7.5 / 10 HIGH source: CNA overview
CWE(s): CWE-305
Reserved: 2026-01-06
Published: 2026-02-10 16:39 UTC
Last updated: 2026-02-26 16:04 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/22xxx/CVE-2026-22153.json
Linked Threat: CVE-2026-22153 — CVE-2026-22153

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-02-10 16:16:11 UTC
NVD last modified: 2026-02-12 16:03:10 UTC
NVD CVSS v3.1: 8.1 / 10 HIGH source: psirt@fortinet.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitability subscore: 2.2 / 10
Impact subscore: 5.9 / 10
EPSS score: 0.0008 (probability of exploitation in next 30 days)
EPSS percentile: 22.87% vs all CVEs — higher = more likely to be exploited, as of 2026-05-25

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-6387
Assigner: fortinet
Published: Feb 10, 2026, 3:39:12 PM
Updated: Feb 26, 2026, 3:04:11 PM
EUVD base score (CVSS 3.1): 7.5 / 10
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
EUVD-reported EPSS: 0.0800
Vendors: Fortinet
Products: FortiOS (7.6.0 ≤7.6.4)

FortiOS (7.6.0 ≤7.6.4)
Aliases: GHSA-p2r3-58qh-phf8

ENISA description: An Authentication Bypass by Primary Weakness vulnerability [CWE-305] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4 may allow an unauthenticated attacker to bypass LDAP authentication of Agentless VPN or FSSO policy, when the remote LDAP server is configured in a specific way.

EUVD references (1)

https://fortiguard.fortinet.com/psirt/FG-IR-25-1052

Affected products (1)

Vendor	Product	Versions	Platforms
Fortinet	FortiOS	`7.6.0` (affected)	—

Affected products — CPE 2.3 (1) NVD

NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.

cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*

Vendor references (1)

References embedded in the original CVE record by the assigning CNA.

https://fortiguard.fortinet.com/psirt/FG-IR-25-1052

Web references (5)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

http://cwe.mitre.org/data/definitions/305.html rapid7:cwe.mitre.org
https://attackerkb.com/topics/CVE-2026-22153 rapid7:attackerkb.com
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-6387 rapid7:euvd.enisa.europa.eu
https://fortiguard.fortinet.com/psirt/FG-IR-25-1052 rapid7:fortiguard.fortinet.com
https://www.cve.org/CVERecord?id=CVE-2026-22153 rapid7:www.cve.org

NVD-tagged references (1)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://fortiguard.fortinet.com/psirt/FG-IR-25-1052 psirt@fortinet.com Vendor Advisory

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

Microsoft Patch Tuesday March 2026 - 78 Vulnerabilities Fixed ...

web:cybersecuritynews.com

Microsoft released its March 2026 Patch Tuesday security update on March 10, 2026 , addressing 78 vulnerabilities across Windows, Microsoft Office, Azure, SQL Server, and .NET. The update includes one actively exploited zero-day vulnerability and multiple Critical-rated flaws demanding immediate attention from security teams. The most urgent fix this month is CVE - 2026 -21262, the sole zero-day ...

2026-05-22 15:51 UTC
PatchaPalooza — Microsoft Patch Dashboard

web:patchapalooza.com

Microsoft Patch Tuesday vulnerability intelligence dashboard. Live CVSS scores, exploit tracking, threat analysis, and security update data from MSRC, VulnCheck, CISA KEV, and EPSS.

2026-05-22 15:51 UTC
Security Update Guide - Microsoft

web:portal.msrc.microsoft.com

The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

2026-05-22 15:51 UTC
CVE-2026-22153 : Authentication Bypass Vulnerability in Fortinet FortiOS

web:securityvulnerability.io

CVE-2026-22153 is an authentication bypass vulnerability identified in Fortinet's FortiOS, specifically affecting versions 7.6.0 through 7.6.4. FortiOS is a critical operating system that underpins Fortinet's security products, providing essential functions such as VPN services and firewall policies.

2026-05-22 15:51 UTC
APT28 Tied to CVE-2026-21513 MSHTML 0-Day Exploited Before Feb 2026 ...

web:thehackernews.com

APT28 exploited CVE - 2026 -21513, an MSHTML zero-day (CVSS 8.8), using malicious LNK files to bypass security controls and execute code.

2026-05-22 15:51 UTC
Microsoft fixes six zero-days on February 2026 Patch Tuesday

web:www.csoonline.com

Microsoft highlighted six new and actively exploited vulnerabilities among the 60 fixes issued in today's February Patch Tuesday releases.

2026-05-22 15:51 UTC
Oracle Critical Patch Update Advisory - April 2026

web:www.oracle.com

This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

2026-05-22 15:51 UTC
February 2026 Microsoft Patch Tuesday | Tenable®

web:www.tenable.com

Microsoft patched six zero-day vulnerabilities that were exploited in the wild including CVE - 2026 -21510 and CVE - 2026 -21513.

2026-05-22 15:51 UTC
I tested Windows 11 March 2026 Updates: Everything new ... - Windows Latest

web:www.windowslatest.com

Windows 11 March 2026 Patch Tuesday update adds Emoji 16.0, Sysmon, network speed test, reliability improvements, and security fixes.

2026-05-22 15:51 UTC
Patch Tuesday May 2026: Security Updates & CVE Analysis

web:zecurit.com

Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

2026-05-22 15:51 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-22153.json.

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