Is CVE-2007-4455 in the CISA KEV catalog?

No. CVE-2007-4455 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2007-4455?

CVE-2007-4455 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2007-4455?

CVE-2007-4455 has an EPSS score of 1.77% (76th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2007-4455?

Upgrade asterisk on debian 11 to 1:1.4.11~dfsg-1 or later.

CVE & CISA-KEV Catalog

CVE-2007-4455

MEDIUMEPSS 76th pctl

5.0

CVSS v2

NVD

Description

The SIP channel driver (chan_sip) in Asterisk Open Source 1.4.x before 1.4.11, AsteriskNOW before beta7, Asterisk Appliance Developer Kit 0.x before 0.8.0, and s800i (Asterisk Appliance) 1.x before 1.0.3 allows remote attackers to cause a denial of service (memory exhaustion) via a SIP dialog that causes a large number of history entries to be created.

How to fix

Remediation Available

asteriskDebian

Fixed in:1:1.4.11~dfsg-1CVE-2007-4455

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

1.77%probability of exploitation in 30 days

76thpercentile

Elevated risk: more likely to be exploited than 76% of all known CVEs.

References

Other references8

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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.