Fortinet FortiOS up to 7.4.2 SSL-VPN out-of-bounds write

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability was found in Fortinet FortiOS up to 7.4.2 (Firewall Software). It has been declared as very critical. This vulnerability affects an unknown code block of the component SSL-VPN. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was presented 02/09/2024 as FG-IR-24-015. The advisory is available at This vulnerability was named CVE-2024-21762 since 01/02/2024. Technical details are unknown but an exploit is available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 02/11/2024).

It is declared as highly functional. As 0-day the estimated underground price was around $25k-$100k.

Upgrading to version 6.2.16, 6.4.15, 7.0.14, 7.2.7 or 7.4.3 eliminates this vulnerability.

Additional details are provided at







CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.4

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔒
VulDB Reliability: 🔍



VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍


Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Highly functional

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒


Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: FortiOS 6.2.16/6.4.15/7.0.14/7.2.7/7.4.3


01/02/2024 CVE reserved
02/09/2024 +38 days Advisory disclosed
02/09/2024 +0 days VulDB entry created
02/11/2024 +2 days VulDB entry last update



Advisory: FG-IR-24-015
Status: Confirmed

CVE: CVE-2024-21762 (🔒)
scip Labs:
Misc.: 🔒


Created: 02/09/2024 03:51 AM
Updated: 02/11/2024 01:36 PM
Changes: 02/09/2024 03:51 AM (41), 02/09/2024 03:53 AM (1), 02/11/2024 01:36 PM (1)
Complete: 🔍


shoper (+0)
14 days ago
Is there any exploit for this CVE?

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