How severe is CVE-2003-1321?

CVE-2003-1321 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2003-1321 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2003-1321?

CVE-2003-1321 affects Avant Force Avant Browser. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2003-1321?

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

When was CVE-2003-1321 published?

CVE-2003-1321 was published on 2003-12-31 and last updated on 2026-06-16.

CVE-2003-1321

CVE-2003-1321 is a high-severity vulnerability in Avant Force Avant Browser with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Avant Force Avant Browser
Published: 2003-12-31
Last modified: 2026-06-16

Description

Buffer overflow in Avant Browser 8.02 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long URL in an HTTP request.

Frequently asked questions

What is CVE-2003-1321?: Buffer overflow in Avant Browser 8.02 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long URL in an HTTP request.
How severe is CVE-2003-1321?: CVE-2003-1321 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2003-1321 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2003-1321?: CVE-2003-1321 affects Avant Force Avant Browser. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2003-1321?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2003-1321 published?: CVE-2003-1321 was published on 2003-12-31 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:avant_force:avant_browser:8.2:*:*:*:*:*:*:*

More vulnerabilities in Avant Force Avant Browser

CVE-2007-1501 — Critical (CVSS 9.3): Stack-based buffer overflow in Avant Browser 11.0 build 26 allows remote attackers to cause a denial of service (crash)…
CVE-2009-3004 — Medium (CVSS 4.3): Avant Browser 11.7 Builds 35 and 36 allows remote attackers to spoof the address bar, via window.open with a relative…

All CVEs affecting Avant Force Avant Browser →