CVE-2021-41026Network attack vector

Authenticated file disclosure via API path traversal

Published Apr 6, 2022 · Updated Oct 22, 2024

Relative path traversal in Fortinet FortiWeb 6.3.0 through 6.3.15 and 6.4.0 through 6.4.1 allows remote authenticated users to read files. The GUI API controller processes crafted relative paths without confining resolution to files in the intended directory. Valid FortiWeb credentials and network access to the management API are required; the reported consequence is filesystem confidentiality loss.

CVSS severity6.5
Medium
EPSS probability0.93%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Relative path traversal in Fortinet FortiWeb 6.3.0 through 6.3.15 and 6.4.0 through 6.4.1 allows remote authenticated users to read files. The GUI API controller processes crafted relative paths without confining resolution to files in the intended directory. Valid FortiWeb credentials and network access to the management API are required; the reported consequence is filesystem confidentiality loss.

The record

CVE
CVE-2021-41026
Published
Apr 6, 2022
Updated
Oct 22, 2024
Vendor
Fortinet
Product
FortiWeb
Classifications
CWE-23, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 6, 2022CVE publishedPublication date reported by the CVE source.
  2. Oct 22, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=FortiWeb 6.4.1, 6.4.0, and 6.3.0 through 6.3.15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Fortinet · FortiWebversion=FortiWeb 6.4.1, 6.4.0, and 6.3.0 through 6.3.15

Published CVSS scores

6.5Fortinet, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-23Relative Path Traversal
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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