CVE-2022-27491

HIGH

7.5

CVSS Score

Published: September 6, 2022 at 03:10 PM UTC

Updated: June 17, 2026 at 04:37 AM UTC

1 product affected across 1 vendorFortiOS

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Severity

HIGH7.5

Exploit prediction

EPSS 1%

SSVC

No known exploit

Description

A improper verification of source of a communication channel in Fortinet FortiOS with IPS engine version 7.201 through 7.214, 7.001 through 7.113, 6.001 through 6.121, 5.001 through 5.258 and before 4.086 allows a remote and unauthenticated attacker to trigger the sending of "blocked page" HTML data to an arbitrary victim via crafted TCP requests, potentially flooding the victim.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

FortiOS · Fortinet

95%

6.0.0 ≤ v ≤ 6.0.146.2.0 ≤ v < 6.2.116.4.0 ≤ v < 6.4.97.0.0 ≤ v < 7.0.66.0.0 6.0.1 6.0.10 6.0.11 6.0.12 6.0.13 6.0.14 6.0.2 6.0.3 6.0.4 6.0.5 6.0.6 6.0.7 6.0.8 6.0.9 6.2.0 6.2.1 6.2.10 6.2.2 6.2.3 6.2.4 6.2.5 6.2.6 6.2.7 6.2.8 6.2.9 6.4.0 6.4.1 6.4.2 6.4.3 6.4.4 6.4.5 6.4.6 6.4.7 6.4.8 6.4.9 7.0.0 7.0.1 7.0.2 7.0.3 7.0.4 7.0.5 7.2.0

Affected range stops below 6.2.11, so it looks safe — our inference, not a vendor statement

Affected range stops below 6.4.9, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.0.6, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://fortiguard.com/psirt/FG-IR-22-073

References (1)

x_refsource_CONFIRMVendor Advisory

Source: [email protected]

https://fortiguard.com/psirt/FG-IR-22-073

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

NVD-CWE-Other

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