How severe is CVE-2007-4561?

CVE-2007-4561 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2007-4561 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-4561?

CVE-2007-4561 primarily affects Realnetworks Helix Dna Server. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-4561?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2007-4561 published?

CVE-2007-4561 was published on 2007-08-28 and last updated on 2026-06-16.

CVE-2007-4561

CVE-2007-4561 is a critical-severity vulnerability in Realnetworks Helix Dna Server with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 6% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Realnetworks Helix Dna Server
Published: 2007-08-28
Last modified: 2026-06-16

Description

Heap-based buffer overflow in the RTSP service in Helix DNA Server before 11.1.4 allows remote attackers to execute arbitrary code via an RSTP command containing multiple Require headers.

Frequently asked questions

What is CVE-2007-4561?: Heap-based buffer overflow in the RTSP service in Helix DNA Server before 11.1.4 allows remote attackers to execute arbitrary code via an RSTP command containing multiple Require headers.
How severe is CVE-2007-4561?: CVE-2007-4561 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2007-4561 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-4561?: CVE-2007-4561 primarily affects Realnetworks Helix Dna Server. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2007-4561?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2007-4561 published?: CVE-2007-4561 was published on 2007-08-28 and last updated on 2026-06-16.

References

Affected products (5)

cpe:2.3:a:realnetworks:helix_dna_server:10.0:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:helix_dna_server:11.0:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:helix_dna_server:11.1:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:helix_dna_server:11.1.2:*:*:*:*:*:*:*
cpe:2.3:a:realnetworks:helix_dna_server:11.1.3:*:*:*:*:*:*:*

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