CVE-2021-33601Network attack vector

Authenticated code execution via modified web settings

Published Sep 28, 2021 · Updated Aug 3, 2024

Code execution in the web interface of F-Secure Internet Gatekeeper 5.10 through 5.50.47 allows remote authenticated users to run code. F-Secure has not published which settings accept attacker-controlled data or how the web interface converts those values into executable code. Access to the password-protected administrative interface and user interaction are required; successful exploitation runs code on the gateway server.

CVSS severity7.6
High
EPSS probability0.94%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code execution in the web interface of F-Secure Internet Gatekeeper 5.10 through 5.50.47 allows remote authenticated users to run code. F-Secure has not published which settings accept attacker-controlled data or how the web interface converts those values into executable code. Access to the password-protected administrative interface and user interaction are required; successful exploitation runs code on the gateway server.

The record

CVE
CVE-2021-33601
Published
Sep 28, 2021
Updated
Aug 3, 2024
Vendor
F-Secure
Product
F-Secure Internet Gatekeeper
Classifications
Unavailable
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 28, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=5 Series All Version

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

F-Secure · F-Secure Internet Gatekeeperversion=5 Series All Version

Published CVSS scores

7.6F-SecureCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:H
6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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