How severe is CVE-2008-5402?

CVE-2008-5402 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2008-5402 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-5402?

CVE-2008-5402 primarily affects Cerulean Studios Trillian. In total, 55 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-5402?

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-2008-5402 published?

CVE-2008-5402 was published on 2008-12-10 and last updated on 2026-06-16.

CVE-2008-5402

CVE-2008-5402 is a critical-severity vulnerability in Cerulean Studios Trillian 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-399.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 7% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Cerulean Studios Trillian
Published: 2008-12-10
Last modified: 2026-06-16

Description

Double free vulnerability in the XML parser in Trillian before 3.1.12.0 allows remote attackers to execute arbitrary code via a crafted XML expression, related to the "IMG SRC ID."

Frequently asked questions

What is CVE-2008-5402?: Double free vulnerability in the XML parser in Trillian before 3.1.12.0 allows remote attackers to execute arbitrary code via a crafted XML expression, related to the "IMG SRC ID."
How severe is CVE-2008-5402?: CVE-2008-5402 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2008-5402 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-5402?: CVE-2008-5402 primarily affects Cerulean Studios Trillian. In total, 55 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-5402?: 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-2008-5402 published?: CVE-2008-5402 was published on 2008-12-10 and last updated on 2026-06-16.

References

Affected products (55)

cpe:2.3:a:cerulean_studios:trillian:0.50:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:0.52:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:0.60:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:0.61:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:0.62:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:0.63:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:0.70:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:0.71:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:0.72:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:0.73:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:0.74:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:0.74c:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:0.74d:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:0.74e:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:0.74f:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:0.74g:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:0.74i:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:0.635:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:0.725:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:0.6351:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:1.0:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:1.0:*:pro:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:2.0:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:2.0:*:pro:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:2.1:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:3.0:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:3.0:*:basic:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:3.0:*:pro:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:3.1:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:3.1:*:basic:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:3.1:*:pro:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:3.1.0.120:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:3.1.0.121:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:3.1.5.0:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:3.1.5.1:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:3.1.6.0:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:3.1.7.0:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:3.1.8.0:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:3.1.9.0:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:3.1.9.0:*:basic:*:*:*:*:*

More vulnerabilities in Cerulean Studios Trillian

CVE-2008-5403 — Critical (CVSS 10.0): Heap-based buffer overflow in the XML parser in the AIM plugin in Trillian before 3.1.12.0 allows remote attackers to…
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CVE-2002-2390 — Critical (CVSS 10.0): Buffer overflow in the IDENT daemon (identd) in Trillian 0.6351, 0.725, 0.73, 0.74 and 1.0 pro allows remote attackers…
CVE-2008-2409 — Critical (CVSS 9.3): Stack-based buffer overflow in Cerulean Studios Trillian before 3.1.10.0 allows remote attackers to execute arbitrary…
CVE-2008-2008 — Critical (CVSS 9.3): Buffer overflow in the Display Names message feature in Cerulean Studios Trillian Basic and Pro 3.1.9.0 allows remote…
CVE-2007-3832 — Critical (CVSS 9.3): Buffer overflow in the AOL Instant Messenger (AIM) protocol handler in AIM.DLL in Cerulean Studios Trillian allows…

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Other CWE-399 (Resource Management Errors) vulnerabilities

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CVE-2015-0335 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0333 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2014-4121 — Critical (CVSS 10.0): Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2 does not properly parse internationalized…
CVE-2014-0560 — Critical (CVSS 10.0): Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.12 and 11.x before 11.0.09 on Windows and OS…

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