How severe is CVE-2003-0520?

CVE-2003-0520 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2003-0520 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2003-0520?

CVE-2003-0520 primarily affects Cerulean Studios Trillian. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2003-0520?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2003-0520 published?

CVE-2003-0520 was published on 2003-08-18 and last updated on 2026-06-16.

CVE-2003-0520

CVE-2003-0520 is a medium-severity vulnerability in Cerulean Studios Trillian with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Cerulean Studios Trillian
Published: 2003-08-18
Last modified: 2026-06-16

Description

Trillian 1.0 Pro and 0.74 Freeware allows remote attackers to cause a denial of service (crash) via a TypingUser message in which the "TypingUser" string has been modified.

Frequently asked questions

What is CVE-2003-0520?: Trillian 1.0 Pro and 0.74 Freeware allows remote attackers to cause a denial of service (crash) via a TypingUser message in which the "TypingUser" string has been modified.
How severe is CVE-2003-0520?: CVE-2003-0520 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2003-0520 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2003-0520?: CVE-2003-0520 primarily affects Cerulean Studios Trillian. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2003-0520?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2003-0520 published?: CVE-2003-0520 was published on 2003-08-18 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:cerulean_studios:trillian:0.74:*:*:*:*:*:*:*
cpe:2.3:a:cerulean_studios:trillian:1.0:*:*:*:*:*:*:*

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