How severe is CVE-2009-4509?

CVE-2009-4509 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2009-4509 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-4509?

CVE-2009-4509 primarily affects Vsecurity Tandberg Video Communication Server. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-4509?

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-2009-4509 published?

CVE-2009-4509 was published on 2010-04-13 and last updated on 2026-06-16.

CVE-2009-4509

CVE-2009-4509 is a critical-severity vulnerability in Vsecurity Tandberg Video Communication 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-94.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 5% (90th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Vsecurity Tandberg Video Communication Server
Published: 2010-04-13
Last modified: 2026-06-16

Description

The administrative web console on the TANDBERG Video Communication Server (VCS) before X4.3 uses predictable session cookies in (1) tandberg/web/lib/secure.php and (2) tandberg/web/user/lib/secure.php, which makes it easier for remote attackers to bypass authentication, and execute arbitrary code by loading a custom software update, via a crafted "Cookie: tandberg_login=" HTTP header.

Frequently asked questions

What is CVE-2009-4509?: The administrative web console on the TANDBERG Video Communication Server (VCS) before X4.3 uses predictable session cookies in (1) tandberg/web/lib/secure.php and (2) tandberg/web/user/lib/secure.php, which makes it easier for remote attackers to bypass authentication, and execute arbitrary code by loading a custom software update, via a crafted "Cookie: tandberg_login=" HTTP header.
How severe is CVE-2009-4509?: CVE-2009-4509 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2009-4509 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-4509?: CVE-2009-4509 primarily affects Vsecurity Tandberg Video Communication Server. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-4509?: 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-2009-4509 published?: CVE-2009-4509 was published on 2010-04-13 and last updated on 2026-06-16.

References

Affected products (10)

cpe:2.3:a:vsecurity:tandberg_video_communication_server:*:*:*:*:*:*:*:*
cpe:2.3:a:vsecurity:tandberg_video_communication_server:x1.0.0:*:*:*:*:*:*:*
cpe:2.3:a:vsecurity:tandberg_video_communication_server:x1.1.0:*:*:*:*:*:*:*
cpe:2.3:a:vsecurity:tandberg_video_communication_server:x1.2.0:*:*:*:*:*:*:*
cpe:2.3:a:vsecurity:tandberg_video_communication_server:x2.0.0:*:*:*:*:*:*:*
cpe:2.3:a:vsecurity:tandberg_video_communication_server:x2.1.0:*:*:*:*:*:*:*
cpe:2.3:a:vsecurity:tandberg_video_communication_server:x3.0.0:*:*:*:*:*:*:*
cpe:2.3:a:vsecurity:tandberg_video_communication_server:x3.1.0:*:*:*:*:*:*:*
cpe:2.3:a:vsecurity:tandberg_video_communication_server:x4.1.0:*:*:*:*:*:*:*
cpe:2.3:a:vsecurity:tandberg_video_communication_server:x4.2.0:*:*:*:*:*:*:*

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