CVE-2022-33877

Installation-file tampering via insecure default permissions

Published Jun 13, 2023 · Updated Oct 23, 2024

Incorrect default permissions in Fortinet FortiClient Windows and FortiConverter allow local users to tamper with installation files. When either product is installed in an insecure folder, its default access controls leave installation files writable to a low-privileged local account. Successful exploitation requires local authentication and the insecure installation path, and file replacement can compromise the installed application and its data.

CVSS severity5.5
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect default permissions in Fortinet FortiClient Windows and FortiConverter allow local users to tamper with installation files. When either product is installed in an insecure folder, its default access controls leave installation files writable to a low-privileged local account. Successful exploitation requires local authentication and the insecure installation path, and file replacement can compromise the installed application and its data.

The record

CVE
CVE-2022-33877
Published
Jun 13, 2023
Updated
Oct 23, 2024
Vendor
Fortinet
Product
FortiConverter
Classifications
CWE-276
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 23, 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=6.0.0 <=6.0.3
  2. Affected versionversion=6.2.0 <=6.2.1
  3. Affected versionversion=7.0.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Fortinet · FortiConverterversion=6.0.0 <=6.0.3; version=6.2.0 <=6.2.1; version=7.0.0
Fortinet · FortiClient Windowsversion=6.4.0 <=6.4.8; version=7.0.0 <=7.0.6

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-276Incorrect Default Permissions

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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