Is CVE-2008-3263 in the CISA KEV catalog?

No. CVE-2008-3263 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2008-3263?

CVE-2008-3263 has a CVSS v2 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2008-3263?

CVE-2008-3263 has an EPSS score of 28.00% (98th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2008-3263

HIGHEPSS 98th pctl

7.8

CVSS v2

NVD

Description

The IAX2 protocol implementation in Asterisk Open Source 1.0.x, 1.2.x before 1.2.30, and 1.4.x before 1.4.21.2; Business Edition A.x.x, B.x.x before B.2.5.4, and C.x.x before C.1.10.3; AsteriskNOW; Appliance Developer Kit 0.x.x; and s800i 1.0.x before 1.2.0.1 allows remote attackers to cause a denial of service (call-number exhaustion and CPU consumption) by quickly sending a large number of IAX2 (IAX) POKE requests.

CWE-399

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

28.00%probability of exploitation in 30 days

98thpercentile

Very high risk: more likely to be exploited than 98% of all known CVEs.

References

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.