CVE-2005-3901

CVE-2005-3901 is a high-severity vulnerability in Macromedia Flash Communication Server with a CVSS 2.0 base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

Macromedia Flash Communication Server MX 1.0 and 1.5 does not sufficiently validate certain RTMP data, which allows attackers to cause a denial of service (instability or crash), as demonstrated using an alpha release build of Flash Player 8.5 (build 133).

Frequently asked questions

What is CVE-2005-3901?
Macromedia Flash Communication Server MX 1.0 and 1.5 does not sufficiently validate certain RTMP data, which allows attackers to cause a denial of service (instability or crash), as demonstrated using an alpha release build of Flash Player 8.5 (build 133).
How severe is CVE-2005-3901?
CVE-2005-3901 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2005-3901 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-3901?
CVE-2005-3901 primarily affects Macromedia Flash Communication Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2005-3901?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2005-3901 published?
CVE-2005-3901 was published on 2005-11-29 and last updated on 2026-06-16.

References

Affected products (2)