CVE-2022-27491

highpriority · track · 30OT risk · elevatedEPSS 0.014 · 72 %ileEUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
1.39% (72nd) EPSS
CVSS 7.5 · high
Is it mine?
6 products
Check your exposure
Who says so?
3 sources
cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-22

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.

01

cvss

Technical severity, 0–10. One row per scoring source.

7.5
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6
v3.16.8mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H/E:F/RL:U/RC:Csecondary · ENISA EU
v3.16.8mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · psirt@fortinet.comexploitability 2.2 · impact 4
v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)
02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-345USLLM-inferredCWE-406USLLM-inferred
04

affected products (6)

Products and version ranges known to be affected.

  • Fortinet Fortinet FortiOS≤ FortiOS 7.2.0, 7.0.5, 7.0.4, 7.0.3, 7.0.2, 7.0.1, 7.0.0, 6.4.9, 6.4.8, 6.4.7, 6.4.6, 6.4.5, 6.4.4, 6.4.3, 6.4.2, 6.4.1, 6.4.0, 6.2.10, 6.2.9, 6.2.8, 6.2.7, 6.2.6, 6.2.5, 6.2.4, 6.2.3, 6.2.2, 6.2.1, 6.2.0, 6.0.14, 6.0.13, 6.0.12, 6.0.11, 6.0.10, 6.0.9, 6.0.8, 6.0.7, 6.0.6, 6.0.5, 6.0.4, 6.0.3, 6.0.2, 6.0.1, 6.0.0enisa_euvdEU
  • fortinet fortios6.0.0 → 6.0.14nvdUScpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
  • fortinet fortios6.2.0 → 6.2.11nvdUScpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
  • fortinet fortios6.4.0 → 6.4.9nvdUScpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
  • fortinet fortios7.0.0 → 7.0.6nvdUScpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
  • fortinet fortios= 7.2.0nvdUScpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
05

also known as (3)

Other names and identifiers for this entity.

06

sources

Which sources assert this record, and when.

cnnvdenisa_euvdnvdNVDCVE.orgMITRE
published 2022-09-06modified 2026-06-17
07

references (7)

External citations — patches, advisories, analysis.

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