Is CVE-2016-7551 in the CISA KEV catalog?

No. CVE-2016-7551 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-7551?

CVE-2016-7551 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2016-7551?

CVE-2016-7551 has an EPSS score of 5.47% (92th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-7551?

Upgrade asterisk on debian 11 to 1:13.11.2~dfsg-1 or later.

CVE & CISA-KEV Catalog

CVE-2016-7551

HIGHEPSS 92th pctl

7.5

CVSS v3

NVD

Description

chain_sip in Asterisk Open Source 11.x before 11.23.1 and 13.x 13.11.1 and Certified Asterisk 11.6 before 11.6-cert15 and 13.8 before 13.8-cert3 allows remote attackers to cause a denial of service (port exhaustion).

CWE-399Resource Management Errors

How to fix

Remediation Available

asteriskDebian

Fixed in:1:13.11.2~dfsg-1CVE-2016-7551

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

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

5.47%probability of exploitation in 30 days

92ndpercentile

High risk: more likely to be exploited than 92% of all known CVEs.

References

Patch3

Vendor Advisory1

downloads.asterisk.org

Third-Party Advisory1

debian.org

Related Vulnerabilities

Other CWE-399 (Resource Management Errors) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2009-3103	High	10.0	90%	-	-
CVE-2009-0075	High	9.3	85%	-	-
CVE-2005-1790	Low	2.6	83%	-	-
CVE-2010-0806	High	8.8	82%	KEV	-
CVE-2009-2526	High	7.8	82%	-	-
CVE-2015-1868	High	7.8	82%	-	Fix

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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 2026-05-13.