CVE-2004-1736: Cacti 0.8.5a allows remote attackers to gain sensitive information via an HTTP request to (1) auth.php, (2) au

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MEDIUM 5.0DOWNGRADE

CVE-2004-1736 is a medium-severity flaw (CVSS 5.0) affecting cacti. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cacti 0.8.5a allows remote attackers to gain sensitive information via an HTTP request to (1) auth.php, (2) auth_login.php, (3) auth_changepassword.php, and possibly other php files, which reveal the installation path in a PHP error message.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	1.5% (top 25%)
CISA exploited list	No
Published	2004-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: the cacti group

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

Am I affected?

Timeline

2004-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:08 UTCUpdated Record last modified

the cacti group cacti DOWNGRADE

Affected: 0.8.5a

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.8.5a

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.8.5a (Debian / Ubuntu)

apt-cache madison cacti sudo apt install cacti=<VERSION_BEFORE_0.8.5a> sudo apt-mark hold cacti

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

dnf --showduplicates list cacti sudo dnf downgrade cacti-<VERSION_BEFORE_0.8.5a> sudo dnf versionlock add cacti

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-2004-1736?

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

Is CVE-2004-1736 being exploited?

CVE-2004-1736 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-2004-1736 affect?

CVE-2004-1736 affects cacti. Severity is medium (CVSS 5.0). Cacti 0.8.5a allows remote attackers to gain sensitive information via an HTTP request to (1) auth.php, (2) auth_login.php, (3) auth_changepassword.php, and possibly other php files, which reveal the installation path in a PHP error message

How urgent is CVE-2004-1736?

Priority 41/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2025-66399 HIGH 8.8 UPGRADE Cacti is an open source performance and fault management framework
CVE-2005-10004 HIGH 8.8 UPGRADE Cacti versions prior to 0.8.6-d contain a remote command execution vulnerability in the graph_view.php script
CVE-2026-40083 HIGH 7.2 UPGRADE Cacti is an open source performance and fault management framework
CVE-2026-40080 MEDIUM 6.1 UPGRADE Cacti is an open source performance and fault management framework
CVE-2026-40082 MEDIUM 5.4 UPGRADE Cacti is an open source performance and fault management framework

References

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