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Known Exploited Vulnerability
9.8
CRITICAL CVSS 3.1
CVE-2026-21643
Fortinet FortiClient EMS SQL Injection Vulnerability - [Actively Exploited]
Overview
Description

An improper neutralization of special elements used in an sql command ('sql injection') vulnerability in Fortinet FortiClientEMS 7.4.4 may allow an unauthenticated attacker to execute unauthorized code or commands via specifically crafted HTTP requests.

Details
INFO

Published Date :

Feb. 6, 2026, 9:15 a.m.

Last Modified :

April 14, 2026, 2:21 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
CISA Notification
CISA KEV (Known Exploited Vulnerabilities)

For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.

Description :

Fortinet FortiClient EMS contains a SQL injection vulnerability that may allow an unauthenticated attacker to execute unauthorized code or commands via specifically crafted HTTP requests.

Required Action :

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Known Ransomware Campaign Use:

Unknown

Notes :

https://fortiguard.fortinet.com/psirt/FG-IR-25-1142 ; https://nvd.nist.gov/vuln/detail/CVE-2026-21643

Impact
Affected Products

The following products are affected by CVE-2026-21643 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Fortinet forticlientems
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 CRITICAL 6abe59d8-c742-4dff-8ce8-9b0ca1073da8
CVSS 3.1 CRITICAL [email protected]
Solution
Update FortiClientEMS to a patched version to prevent SQL injection vulnerabilities.
  • Update FortiClientEMS to a version that addresses this vulnerability.
  • Apply vendor-supplied security patches and updates promptly.
  • Validate system integrity after applying updates.
Public PoC/Exploit Available at Github

CVE-2026-21643 has a 10 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-21643.

URL Resource
https://fortiguard.fortinet.com/psirt/FG-IR-25-1142 Vendor Advisory
https://github.com/0xBlackash/CVE-2026-21643/blob/main/cve-2026-21643.py Exploit
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21643 US Government Resource
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-21643 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-21643 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
YurilLAB/WEWAF

None

Go HTML JavaScript CSS TypeScript

Updated: 3 days, 5 hours ago
1 stars 0 fork 0 watcher
Born at : April 21, 2026, 4:10 p.m. This repo has been linked 31 different CVEs too.
Profile Photo
pduggusa/dugganusa-cli

CLI threat intel scanner. Check IPs, domains, hashes, CVEs against 1M+ IOCs from your terminal. npx dugganusa-lookup

JavaScript

Updated: 1 week ago
2 stars 0 fork 0 watcher
Born at : April 18, 2026, 2:19 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
pduggusa/dugganusa-vscode

VS Code extension: scan code for IPs, domains, hashes, and CVEs against 1M+ threat indicators in real-time. Powered by the DugganUSA STIX feed.

JavaScript

Updated: 1 week, 1 day ago
0 stars 0 fork 0 watcher
Born at : April 18, 2026, 1:24 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
0xBlackash/CVE-2026-21643

CVE-2026-21643

Python

Updated: 1 month ago
0 stars 0 fork 0 watcher
Born at : March 28, 2026, 7:09 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
alirezac0/CVE-2026-21643

Python PoC and Nuclei template for CVE-2026-21643 (Pre-Authentication SQL Injection in FortiClient EMS 7.4.4)

Python

Updated: 1 month ago
0 stars 0 fork 0 watcher
Born at : March 27, 2026, 7:11 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
lucacapacci/PoC-in-GitHub

Mirror of https://github.com/nomi-sec/PoC-in-GitHub

Updated: 2 months, 2 weeks ago
0 stars 0 fork 0 watcher
Born at : Feb. 7, 2026, 10:02 a.m. This repo has been linked 789 different CVEs too.
Profile Photo
DarkSploits/CVE-2026-21643-Exploit

Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') (CWE-89)

Updated: 2 months, 3 weeks ago
0 stars 0 fork 0 watcher
Born at : Feb. 6, 2026, 9:53 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
0xMarcio/cve

Latest CVEs with their Proof of Concept exploits.

Python HTML

Updated: 3 days, 23 hours ago
1221 stars 142 fork 142 watcher
Born at : May 24, 2024, 11:02 a.m. This repo has been linked 84 different CVEs too.
Profile Photo
GhostTroops/TOP

TOP All bugbounty pentesting CVE-2023- POC Exp RCE example payload Things

bugbounty cve exp exploit payload poc rce vulnerability

Shell

Updated: 4 days, 4 hours ago
723 stars 123 fork 123 watcher
Born at : March 19, 2022, 1:54 a.m. This repo has been linked 144 different CVEs too.
Profile Photo
nomi-sec/PoC-in-GitHub

📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.

security cve exploit poc vulnerability

Updated: 3 days, 23 hours ago
7667 stars 1247 fork 1247 watcher
Born at : Dec. 8, 2019, 1:03 p.m. This repo has been linked 749 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-21643 vulnerability anywhere in the article.

  • TheCyberThrone
Fortinet FortiSandbox — Critical Vulnerability Advisory

April 16, 2026Fortinet published a sweeping security advisory on April 14, 2026, disclosing multiple vulnerabilities across its FortiSandbox platform. Two of the flaws are rated Critical with unauthen ... Read more

Published Date: Apr 16, 2026 (1 week, 5 days ago)
  • Daily CyberSecurity
Critical 9.1 Flaws Hit Fortinet FortiSandbox

Fortinet has issued an urgent advisory regarding two critical vulnerabilities in its FortiSandbox platform—vulnerabilities that could allow unauthenticated attackers to bypass security entirely and se ... Read more

Published Date: Apr 15, 2026 (2 weeks ago)
  • CybersecurityNews
CISA Warns of Fortinet SQL Injection Vulnerability Actively Exploited in Attacks

The Cybersecurity and Infrastructure Security Agency (CISA) has issued an urgent warning regarding a critical security flaw in Fortinet products. On April 13, 2026, the agency added a severe SQL injec ... Read more

Published Date: Apr 14, 2026 (2 weeks ago)
  • Daily CyberSecurity
CISA Adds 7 Fresh Exploits to KEV Catalog

The Cybersecurity and Infrastructure Security Agency (CISA) has expanded its Known Exploited Vulnerabilities (KEV) Catalog, adding seven high-risk flaws that are currently being weaponized by maliciou ... Read more

Published Date: Apr 14, 2026 (2 weeks ago)
  • The Hacker News
CISA Adds 6 Known Exploited Flaws in Fortinet, Microsoft, and Adobe Software

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Monday added half a dozen security flaws to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitatio ... Read more

Published Date: Apr 14, 2026 (2 weeks, 1 day ago)
  • TheCyberThrone
CISA Adds Seven Vulnerabilities to KEV Catalog — April 13, 2026

CISA has expanded the Known Exploited Vulnerabilities catalog with seven new entries on April 13, 2026, based on evidence of active exploitation. The batch spans three vendors — Microsoft, Adobe, and ... Read more

Published Date: Apr 14, 2026 (2 weeks, 1 day ago)
  • The Cyber Express
FortiClientEMS Vulnerabilities Under Active Exploitation, Expose Systems to RCE

A newly disclosed set of vulnerabilities affecting Fortinet’s endpoint management platform has raised serious concerns among cybersecurity professionals, particularly as both flaws are already being a ... Read more

Published Date: Apr 07, 2026 (3 weeks ago)
  • The Register
Attackers exploited this critical FortiClient EMS bug as a 0-day

Fortinet released an emergency patch over the weekend for a critical FortiClient Enterprise Management Server (EMS) bug believed to be under attack since at least March 31. The flaw, tracked as CVE-20 ... Read more

Published Date: Apr 06, 2026 (3 weeks, 1 day ago)
  • CybersecurityNews
2,000+ FortiClient EMS Instances Exposed Online Amid Active RCE Vulnerability Exploits in the Wild

The Shadowserver Foundation has issued an urgent warning to FortiClient Enterprise Management Server (EMS) administrators after identifying over 2,000 publicly accessible instances globally, two of wh ... Read more

Published Date: Apr 06, 2026 (3 weeks, 2 days ago)
  • Help Net Security
Week in review: Axios npm supply chain compromise, critical FortiClient EMS bugs exploited

Here’s an overview of some of last week’s most interesting news, articles, interviews and videos: Financial groups lay out a plan to fight AI identity attacks Generative AI tools have brought the cost ... Read more

Published Date: Apr 05, 2026 (3 weeks, 2 days ago)
  • The Hacker News
Fortinet Patches Actively Exploited CVE-2026-35616 in FortiClient EMS

Fortinet has released out-of-band patches for a critical security flaw impacting FortiClient EMS that it said has been exploited in the wild. The vulnerability, tracked as CVE-2026-35616 (CVSS score: ... Read more

Published Date: Apr 05, 2026 (3 weeks, 3 days ago)
  • TheCyberThrone
CVE-2026-35616 — Fortinet FortiClient EMS Critical Pre-Auth RCE

April 5, 2026Executive SummaryFortinet FortiClient Endpoint Management Server (EMS) versions 7.4.5 and 7.4.6 contain a critical improper access control vulnerability (CWE-284) in the API authenticatio ... Read more

Published Date: Apr 05, 2026 (3 weeks, 3 days ago)
  • Help Net Security
FortiClient EMS zero-day exploited, emergency hotfixes available (CVE-2026-35616)

Defused Cyber has spotted a critical Fortinet FortiClient Endpoint Management Server (EMS) zero-day vulnerability (CVE-2026-35616) being exploited in the wild. This time around, the confirmation of ac ... Read more

Published Date: Apr 04, 2026 (3 weeks, 3 days ago)
  • Help Net Security
Critical Fortinet FortiClient EMS bug under active attack (CVE-2026-21643)

A critical SQL injection vulnerability (CVE-2026-21643) in Fortinet FortiClient Endpoint Management Server (EMS), a management server for FortiClient endpoint agents on various platforms, is under act ... Read more

Published Date: Mar 30, 2026 (4 weeks, 1 day ago)
  • CybersecurityNews
Critical Fortinet Forticlient EMS Vulnerability Exploited in Attacks

A critical SQL injection vulnerability in Fortinet’s FortiClient Endpoint Management Server (EMS), tracked as CVE-2026-21643, is actively being exploited in the wild. Threat actors have been leveragin ... Read more

Published Date: Mar 30, 2026 (4 weeks, 1 day ago)
  • security.nl
'Kritiek SQL Injection-lek in Fortinet FortiClientEMS actief misbruikt bij aanvallen'

Een kritiek SQL Injection-beveiligingslek in Fortinet FortiClientEMS wordt al sinds een aantal dagen actief misbruikt bij aanvallen, zo waarschuwt securitybedrijf Defused. Fortinet kwam op 6 februari ... Read more

Published Date: Mar 30, 2026 (4 weeks, 1 day ago)
  • The Hacker News
⚡ Weekly Recap: CI/CD Backdoor, FBI Buys Location Data, WhatsApp Ditches Numbers & More

Another week, another reminder that the internet is still a mess. Systems people thought were secure are being broken in simple ways, showing many still ignore basic advisories. This edition covers a ... Read more

Published Date: Mar 23, 2026 (1 month ago)
  • Daily CyberSecurity
PoC Exploit Publicly Disclosed: Windows ‘libarchive’ Flaw Leaks NetNTLMv2 Hashes

Security researchers Len Sadowski and Oğuz Bektaş have publicly pulled back the curtain on a vulnerability within Windows’ implementation of libarchive. The flaw, tracked as CVE-2025-59284, demonstrat ... Read more

Published Date: Mar 20, 2026 (1 month, 1 week ago)
  • Daily CyberSecurity
PoC Exploit Publicly Disclosed: ‘RegPwn’ Flaw Grants SYSTEM Access via Windows Accessibility

A newly discovered vulnerability, dubbed RegPwn, has pulled back the curtain on a significant security gap in the Windows Accessibility Infrastructure. Tracked as CVE-2026-24291, this local elevation ... Read more

Published Date: Mar 18, 2026 (1 month, 1 week ago)
  • CybersecurityNews
Critical FortiClient SQL Injection Vulnerability Enables Arbitrary Database Access

FortiClient SQL Injection vulnerability A critical SQL injection vulnerability in Fortinet’s FortiClient Endpoint Management Server (EMS). Tracked as CVE-2026-21643, this severe flaw carries a CVSS sc ... Read more

Published Date: Mar 18, 2026 (1 month, 1 week ago)

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-21643 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Modified Analysis by [email protected]

    Apr. 14, 2026

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:fortinet:forticlientems:*:*:*:*:*:*:*:* versions from (including) 7.4.0 up to (excluding) 7.4.5 OR *cpe:2.3:a:fortinet:forticlientems:7.4.4:*:*:*:*:*:*:*
    Added Reference Type CISA-ADP: https://github.com/0xBlackash/CVE-2026-21643/blob/main/cve-2026-21643.py Types: Exploit
    Added Reference Type CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21643 Types: US Government Resource
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Apr. 13, 2026

    Action Type Old Value New Value
    Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21643
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Mar. 30, 2026

    Action Type Old Value New Value
    Added Reference https://github.com/0xBlackash/CVE-2026-21643/blob/main/cve-2026-21643.py
  • Initial Analysis by [email protected]

    Feb. 17, 2026

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:a:fortinet:forticlientems:*:*:*:*:*:*:*:* versions from (including) 7.4.0 up to (excluding) 7.4.5
    Added Reference Type Fortinet, Inc.: https://fortiguard.fortinet.com/psirt/FG-IR-25-1142 Types: Vendor Advisory
  • New CVE Received by [email protected]

    Feb. 06, 2026

    Action Type Old Value New Value
    Added Description An improper neutralization of special elements used in an sql command ('sql injection') vulnerability in Fortinet FortiClientEMS 7.4.4 may allow an unauthenticated attacker to execute unauthorized code or commands via specifically crafted HTTP requests.
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Added CWE CWE-89
    Added Reference https://fortiguard.fortinet.com/psirt/FG-IR-25-1142
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 9.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact