CVE-2001-0076: register.cgi in Ikonboard 2.1.7b and earlier allows remote attackers to execute arbitrary commands via the SEN

This month

HIGH 10.0DOWNGRADE

CVE-2001-0076 is a high-severity flaw (CVSS 10.0) affecting ikonboard. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

register.cgi in Ikonboard 2.1.7b and earlier allows remote attackers to execute arbitrary commands via the SEND_MAIL parameter, which overwrites an internal program variable that references a program to be executed.

Why this priority

Critical severity
EPSS top 8%: very likely to be exploited

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

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	5.2% (top 8%)
CISA exploited list	No
Published	2001-02-12
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: ikonboard.com

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2001-02-12 05:00 UTCPublished CVE record published
2026-06-16 21:53 UTCUpdated Record last modified

ikonboard.com ikonboard DOWNGRADE

Affected: 2.1.7b

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.1.7b

1. Check installed version

apt-cache policy ikonboard || rpm -q ikonboard || ikonboard --version

2. No fixed release: DOWNGRADE to a release before 2.1.7b (Debian / Ubuntu)

apt-cache madison ikonboard sudo apt install ikonboard=<VERSION_BEFORE_2.1.7b> sudo apt-mark hold ikonboard

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ikonboard sudo dnf downgrade ikonboard-<VERSION_BEFORE_2.1.7b> sudo dnf versionlock add ikonboard

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2001-0076?

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

Is CVE-2001-0076 being exploited?

CVE-2001-0076 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-2001-0076 affect?

CVE-2001-0076 affects ikonboard. Severity is high (CVSS 10.0). register.cgi in Ikonboard 2.1.7b and earlier allows remote attackers to execute arbitrary commands via the SEND_MAIL parameter, which overwrites an internal program variable that references a program to be executed.

How urgent is CVE-2001-0076?

Priority 58/100. Critical severity; EPSS top 8%: very likely to be exploited

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References

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