Vulnerability record · CVE-2007-5591 · published 19 October 2007

CVE-2007-5591: Nortel meridian option 11c vulnerability

Nortel · Meridian Option 11c

The CS1000 signaling server in Nortel Enterprise VoIP-Core-CS 1000M Chassis/Cabinet, Enterprise VoIP-Core-CS 1000E and 1000S, Meridian-Core-Option 11C Chassis and Cabinet, and Meridian-Core-Option 51C, 61C, and 81C allows remote attackers to cause a denial of service (telephony application outage) via a flood of packets to Embedded LAN (ELAN) ports.

7.8 CVSS 2.0 High EPSS 2.3% · top 17.4%

7.8CVSS 2.0 base score

2.3%EPSS exploitation probability, 30 days

NoNot in CISA KEV

5Affected product versions listed by NVD

18References

16 Jun 2026Last modified by NVD

Description

AV:N/AC:L/Au:N/C:N/I:N/A:C

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Meridian Option 11c Nortel

Meridian Option 51c Nortel

Meridian Option 61c Nortel

Meridian Option 81c Nortel

Voip Core Cs Nortel

References

Link	Tags
http://osvdb.org/41799
http://secunia.com/advisories/27282	Vendor Advisory
http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=655204
http://www.csnc.ch/static/advisory/csnc/nortel_telephony_server_denial_of_service_v1.0.txt
http://www.securityfocus.com/archive/1/482484/100/0/threaded
http://www.securityfocus.com/bid/26113
http://www.vupen.com/english/advisories/2007/3536	Vendor Advisory
http://www116.nortel.com/pub/repository/CLARIFY/DOCUMENT/2007/42/022871-01.pdf
https://exchange.xforce.ibmcloud.com/vulnerabilities/37252
http://osvdb.org/41799
http://secunia.com/advisories/27282	Vendor Advisory
http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=655204
http://www.csnc.ch/static/advisory/csnc/nortel_telephony_server_denial_of_service_v1.0.txt
http://www.securityfocus.com/archive/1/482484/100/0/threaded
http://www.securityfocus.com/bid/26113
http://www.vupen.com/english/advisories/2007/3536	Vendor Advisory
http://www116.nortel.com/pub/repository/CLARIFY/DOCUMENT/2007/42/022871-01.pdf
https://exchange.xforce.ibmcloud.com/vulnerabilities/37252

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.1CVE-2007-5640Nortel business communications manager vulnerabilityThe Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and additional Nortel products from the IP Phone, Business Communications Manager (BCM), Mobile…EPSS 1.8%23 Oct 2007 4.3CVE-2007-5637Nortel business communications manager information exposure vulnerabilityThe Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and additional Nortel products from the IP Phone, Business Communications Manager (BCM), and ot…EPSS 3.1%23 Oct 2007 4.3CVE-2007-5638Nortel business communications manager information exposure vulnerabilityThe Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and additional Nortel products from the IP Phone, Business Communications Manager (BCM), and ot…EPSS 1.5%23 Oct 2007

Source: NIST National Vulnerability Database (record CVE-2007-5591), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.