CVE-2023-3991: An OS command injection vulnerability exists in the httpd iperfrun.cgi functionality of FreshTomato 2023.3

This week

CRITICAL 10.0REMOTEMITIGATE

CVE-2023-3991 is a critical-severity flaw (CVSS 10.0) affecting freshtomato. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An OS command injection vulnerability exists in the httpd iperfrun.cgi functionality of FreshTomato 2023.3. A specially crafted HTTP request can lead to arbitrary command execution. An attacker can send an HTTP request to trigger this vulnerability.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.1% (top 18%)
CISA exploited list	No
Weakness	CWE-78
Published	2023-10-16
Last modified	2026-06-17

Publisher (CNA): Government Technology Agency of Singapore Cyber Security Group (GovTech CSG) · Vendor: freshtomato

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-10-16 10:15 UTCPublished CVE record published
2026-06-17 06:15 UTCUpdated Record last modified

freshtomato freshtomato MITIGATE

Affected: 2023.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 2023.3

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-3991?

freshtomato: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-3991 being exploited?

CVE-2023-3991 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-3991 affect?

CVE-2023-3991 affects freshtomato. Severity is critical (CVSS 10.0). An OS command injection vulnerability exists in the httpd iperfrun.cgi functionality of FreshTomato 2023.3. A specially crafted HTTP request can lead to arbitrary command execution. An attacker can send an HTTP request to trigger this vulne

How urgent is CVE-2023-3991?

Priority 60/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Apache HTTP Server vulnerabilities

Related CVEs

CVE-2022-42484 CRITICAL 9.8 MITIGATE MITIGATE An OS command injection vulnerability exists in the httpd logs/view.cgi functionality of FreshTomato 2022.5
CVE-2022-38451 HIGH 7.5 MITIGATE MITIGATE A directory traversal vulnerability exists in the httpd update.cgi functionality of FreshTomato 2022.5
CVE-2022-28665 CRITICAL 9.8 MITIGATE A memory corruption vulnerability exists in the httpd unescape functionality of FreshTomato 2022.1
CVE-2022-28664 CRITICAL 9.8 MITIGATE A memory corruption vulnerability exists in the httpd unescape functionality of FreshTomato 2022.1

References

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