CISA KEV · Known exploitedCritical

CVE-2022-42475

Fortinet FortiOS

A heap-based buffer overflow vulnerability [CWE-122] in FortiOS SSL-VPN 7.2.0 through 7.2.2, 7.0.0 through 7.0.8, 6.4.0 through 6.4.10, 6.2.0 through 6.2.11, 6.0.15 and earlier and FortiProxy SSL-VPN 7.2.0 through 7.2.1, 7.0.7 and earlier may allow a remote unauthenticated attacker to execute arbitrary code or commands via specifically crafted requests.

CVSS: 9.8
EPSS: 99.5%
CISA KEV: Listed
Published: 2023.01.02

PRIORITY ASSESSMENT

Immediate review

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

Known exploitationConfirmed by CISA KEV

Exploit probability99.5%

Technical severityCVSS 9.8

Vulnerability overview

Affected product and versions

Product: Fortinet FortiOS
Affected versions: 7.2.0, 7.0.0, 2.0.0, 1.2.0, 1.1.0, 1.0.0, 6.4.0, 6.2.0, 6.0.0, 5.6.0, 5.4.0, 5.2.0, 5.0.0, >= 5.0.0 <= 5.0.14, >= 5.2.0 <= 5.2.15, >= 5.4.0 <= 5.4.13, >= 5.6.0 <= 5.6.14, >= 6.0.0 < 6.0.16, >= 6.2.0 < 6.2.12, >= 6.4.0 < 6.4.11
Fixed versions: 6.0.16, 6.2.12, 6.4.11, 7.0.9, 7.2.3, 2.0.12, 7.0.8, 7.2.2, 6.0.15, 6.4.10

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

CISA required action

Apply updates per vendor instructions.

Due date: 2023.01.03

1
Identify
Confirm that Fortinet FortiOS and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
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-197, CWE-787
KEV added: 2022.12.13
Ransomware use: 확인됨