How severe is CVE-2022-42475?

CVE-2022-42475 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-42475 being actively exploited?

Yes. CVE-2022-42475 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-12-13, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2022-42475?

CVE-2022-42475 primarily affects Fortinet Fortios. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-42475?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2022-42475 have an EU (EUVD) identifier?

Yes. CVE-2022-42475 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2022-45545. It is also flagged as exploited in the EUVD (since 2022-12-13).

When was CVE-2022-42475 published?

CVE-2022-42475 was published on 2023-01-02 and last updated on 2026-06-17.

CVE-2022-42475

CVE-2022-42475 is a critical-severity vulnerability in Fortinet Fortios with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-12-13). The underlying weakness is classified as CWE-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 99% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-12-13)
EU (EUVD) id: EUVD-2022-45545
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-12-13)
Weakness: CWE-787
Affected product: Fortinet Fortios
Published: 2023-01-02
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2022-42475?: 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.
How severe is CVE-2022-42475?: CVE-2022-42475 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-42475 being actively exploited?: Yes. CVE-2022-42475 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-12-13, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2022-42475?: CVE-2022-42475 primarily affects Fortinet Fortios. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-42475?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2022-42475 have an EU (EUVD) identifier?: Yes. CVE-2022-42475 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2022-45545. It is also flagged as exploited in the EUVD (since 2022-12-13).
When was CVE-2022-42475 published?: CVE-2022-42475 was published on 2023-01-02 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*

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