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CISA KEV · Known exploitedCritical

CVE-2024-21762

Fortinet FortiProxy, FortiOS, fortiproxy

A out-of-bounds write in Fortinet FortiOS versions 7.4.0 through 7.4.2, 7.2.0 through 7.2.6, 7.0.0 through 7.0.13, 6.4.0 through 6.4.14, 6.2.0 through 6.2.15, 6.0.0 through 6.0.17, FortiProxy versions 7.4.0 through 7.4.2, 7.2.0 through 7.2.8, 7.0.0 through 7.0.14, 2.0.0 through 2.0.13, 1.2.0 through 1.2.13, 1.1.0 through 1.1.6, 1.0.0 through 1.0.7 allows attacker to execute unauthorized code or commands via specifically crafted requests

CVSS
9.8
EPSS
84.3%
99.7% percentile
CISA KEV
Listed
Published
2024.02.09
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability84.3%
Technical severityCVSS 9.8

Vulnerability overview

A out-of-bounds write in Fortinet FortiOS versions 7.4.0 through 7.4.2, 7.2.0 through 7.2.6, 7.0.0 through 7.0.13, 6.4.0 through 6.4.14, 6.2.0 through 6.2.15, 6.0.0 through 6.0.17, FortiProxy versions 7.4.0 through 7.4.2, 7.2.0 through 7.2.8, 7.0.0 through 7.0.14, 2.0.0 through 2.0.13, 1.2.0 through 1.2.13, 1.1.0 through 1.1.6, 1.0.0 through 1.0.7 allows attacker to execute unauthorized code or commands via specifically crafted requests

Affected product and versions

Product
Fortinet FortiProxy, FortiOS, fortiproxy
Affected versions
>= 7.4.0 <= 7.4.2, >= 7.2.0 <= 7.2.8, >= 7.0.0 <= 7.0.14, >= 2.0.0 <= 2.0.13, >= 1.2.0 <= 1.2.13, >= 1.1.0 <= 1.1.6, >= 1.0.0 <= 1.0.7, >= 7.2.0 <= 7.2.6, >= 7.0.0 <= 7.0.13, >= 6.4.0 <= 6.4.14, >= 6.2.0 <= 6.2.15, >= 6.0.0 <= 6.0.17, >= 1.0.0 < 2.0.14, >= 7.0.0 < 7.0.15, >= 7.2.0 < 7.2.9, >= 7.4.0 < 7.4.3, >= 6.0.0 < 6.2.16, >= 6.4.0 < 6.4.15, >= 7.0.0 < 7.0.14, >= 7.2.0 < 7.2.7
Fixed versions
2.0.14, 7.0.15, 7.2.9, 7.4.3, 6.0.18, 6.2.16, 6.4.15, 7.0.14, 7.2.7

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Due date: 2024.02.16
  1. 1
    Identify

    Confirm that Fortinet FortiProxy, FortiOS, fortiproxy and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-787
KEV added
2024.02.09
Ransomware use
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