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.

Published: 2010-04-13 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-4509 is rated High Risk (73.3/100): CVSS Critical severity, with high exploitation likelihood (EPSS 4.53%, 90th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +1.69% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2009-4509

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 2.84% 4.53% +1.69%
2 2025-09-04 3.63% 2.84% -0.79%
3 2025-03-30 — 3.63% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-4509

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2009-4509

Affected software / configurations for CVE-2009-4509

Vendor Product Version Raw CPE
vsecurity tandberg_video_communication_server <= x4.2.1 cpe:2.3:a:vsecurity:tandberg_video_communication_server:*:*:*:*:*:*:*:*
vsecurity tandberg_video_communication_server x1.0.0 cpe:2.3:a:vsecurity:tandberg_video_communication_server:x1.0.0:*:*:*:*:*:*:*
vsecurity tandberg_video_communication_server x1.1.0 cpe:2.3:a:vsecurity:tandberg_video_communication_server:x1.1.0:*:*:*:*:*:*:*
vsecurity tandberg_video_communication_server x1.2.0 cpe:2.3:a:vsecurity:tandberg_video_communication_server:x1.2.0:*:*:*:*:*:*:*
vsecurity tandberg_video_communication_server x2.0.0 cpe:2.3:a:vsecurity:tandberg_video_communication_server:x2.0.0:*:*:*:*:*:*:*
vsecurity tandberg_video_communication_server x2.1.0 cpe:2.3:a:vsecurity:tandberg_video_communication_server:x2.1.0:*:*:*:*:*:*:*
vsecurity tandberg_video_communication_server x3.0.0 cpe:2.3:a:vsecurity:tandberg_video_communication_server:x3.0.0:*:*:*:*:*:*:*
vsecurity tandberg_video_communication_server x3.1.0 cpe:2.3:a:vsecurity:tandberg_video_communication_server:x3.1.0:*:*:*:*:*:*:*
vsecurity tandberg_video_communication_server x4.1.0 cpe:2.3:a:vsecurity:tandberg_video_communication_server:x4.1.0:*:*:*:*:*:*:*
vsecurity tandberg_video_communication_server x4.2.0 cpe:2.3:a:vsecurity:tandberg_video_communication_server:x4.2.0:*:*:*:*:*:*:*

References for CVE-2009-4509

cvelogic Threat Intelligence