CVE-2006-1831: Direct static code injection vulnerability in sysinfo.cgi in sysinfo 1.21 and possibly other versions before 2

This week

HIGH 7.5DOWNGRADE

CVE-2006-1831 is a high-severity flaw (CVSS 7.5) affecting sysinfo. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Direct static code injection vulnerability in sysinfo.cgi in sysinfo 1.21 and possibly other versions before 2.25 allows remote attackers to execute arbitrary commands via a leading ; (semicolon) in the name parameter in a systemdoc action, which is injected into phpinfo.php.

Why this priority

High severity
EPSS top 5%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	8.5% (top 5%)
CISA exploited list	No
Published	2006-04-19
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: coder-world

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

Am I affected?

Timeline

2006-04-19 16:06 UTCPublished CVE record published
2026-06-16 22:23 UTCUpdated Record last modified

coder-world sysinfo DOWNGRADE

Affected: 1.21

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.21

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.21 (Debian / Ubuntu)

apt-cache madison sysinfo sudo apt install sysinfo=<VERSION_BEFORE_1.21> sudo apt-mark hold sysinfo

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

dnf --showduplicates list sysinfo sudo dnf downgrade sysinfo-<VERSION_BEFORE_1.21> sudo dnf versionlock add sysinfo

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: SysInfo 1.21 - 'sysinfo.cgi' Remote Command Execution

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-2006-1831?

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

Is CVE-2006-1831 being exploited?

CVE-2006-1831 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-2006-1831 affect?

CVE-2006-1831 affects sysinfo. Severity is high (CVSS 7.5). Direct static code injection vulnerability in sysinfo.cgi in sysinfo 1.21 and possibly other versions before 2.25 allows remote attackers to execute arbitrary commands via a leading ; (semicolon) in the name parameter in a systemdoc action,

How urgent is CVE-2006-1831?

Priority 55/100. High severity; EPSS top 5%: very likely to be exploited; Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2018-9310 HIGH 7.8 UPGRADE An issue was discovered in MagniComp SysInfo before 10-H82 if setuid root (the default)
CVE-2018-7268 MEDIUM 5.5 UPGRADE MagniComp SysInfo before 10-H81, as shipped with BMC BladeLogic Automation and other products, contains an inf
CVE-2017-6516 MEDIUM 6.7 UPGRADE A Local Privilege Escalation Vulnerability in MagniComp's Sysinfo before 10-H64 for Linux and UNIX platforms c
CVE-2006-1832 MEDIUM 5.0 DOWNGRADE sysinfo.cgi in sysinfo 1.21 allows remote attackers to obtain the installation path via the debugger action.

References

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