CVE-2021-24016

Command execution via exported CSV formula injection

Published Sep 30, 2021 · Updated Oct 25, 2024

CSV injection in Fortinet FortiManager 6.4.3 and earlier and 6.2.7 and earlier allows attackers to execute commands through an exported file. The policy export path writes an attacker-controlled IPv4 field from a policy name into CSV output without neutralizing spreadsheet formula syntax. Exploitation requires high-privileged access to create the crafted policy data and a victim to export the file and open it in Excel with unsafe formula handling.

CVSS severity3.7
Low
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSV injection in Fortinet FortiManager 6.4.3 and earlier and 6.2.7 and earlier allows attackers to execute commands through an exported file. The policy export path writes an attacker-controlled IPv4 field from a policy name into CSV output without neutralizing spreadsheet formula syntax. Exploitation requires high-privileged access to create the crafted policy data and a victim to export the file and open it in Excel with unsafe formula handling.

The record

CVE
CVE-2021-24016
Published
Sep 30, 2021
Updated
Oct 25, 2024
Vendor
Fortinet
Product
FortiManager
Classifications
CWE-1236, T1204.002
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 30, 2021CVE publishedPublication date reported by the CVE source.
  2. Oct 25, 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=FortiManager 6.4.3, 6.2.7

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

Fortinet · FortiManagerversion=FortiManager 6.4.3, 6.2.7

Published CVSS scores

3.7FortinetCVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:N
3.5FortinetCVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:N/E:P/RL:X/RC:X
6.3NIST NVDCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
9.3NIST NVDAV:N/AC:M/Au:N/C:C/I:C/A:C

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)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1236Improper Neutralization of Formula Elements in a CSV File
T1204.002Malicious File

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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