# Nortel vulnerabilities > Nortel has 44 published vulnerabilities across 104 products in our catalogue. None of them is on the list of flaws known to be exploited today. The most affected product is Contivity, with 9. If you run Nortel software, patch the exploited flaws first. Canonical page: https://www.precursorintelligence.com/vendors/nortel ## At a glance - **Published vulnerabilities:** 44 - **Known to be exploited:** 0 - **Products:** 104 - **Versions:** 58 ## Which Nortel products have the most vulnerabilities? - [Contivity](https://www.precursorintelligence.com/product/nortel/contivity): 9 published vulnerabilities, 16 versions - [Mobile Voice Client 2050](https://www.precursorintelligence.com/product/nortel/mobile_voice_client_2050): 6 published vulnerabilities, 0 versions - [Multimedia Communication Server 5100](https://www.precursorintelligence.com/product/nortel/multimedia_communication_server_5100): 5 published vulnerabilities, 1 version - [Business Communications Manager](https://www.precursorintelligence.com/product/nortel/business_communications_manager): 5 published vulnerabilities, 8 versions - [Communications Server](https://www.precursorintelligence.com/product/nortel/communications_server): 5 published vulnerabilities, 4 versions - [IP Softphone 2050](https://www.precursorintelligence.com/product/nortel/ip_softphone_2050): 5 published vulnerabilities, 0 versions - [Meridian Option 11c](https://www.precursorintelligence.com/product/nortel/meridian_option_11c): 4 published vulnerabilities, 0 versions - [Meridian Option 51c](https://www.precursorintelligence.com/product/nortel/meridian_option_51c): 4 published vulnerabilities, 0 versions - [Meridian Option 61c](https://www.precursorintelligence.com/product/nortel/meridian_option_61c): 4 published vulnerabilities, 0 versions - [Meridian Option 81c](https://www.precursorintelligence.com/product/nortel/meridian_option_81c): 4 published vulnerabilities, 0 versions Each product page lists its own known-exploited flaws. ## Which Nortel vulnerabilities are being exploited? None of Nortel's published vulnerabilities is on the list of flaws known to be exploited today. We keep watching that list. ## Which Nortel flaws are most likely to be used? Ranked by the latest exploit-likelihood forecast (the chance each flaw is used in an attack in the next 30 days): - [CVE-2005-0356](https://www.precursorintelligence.com/what-is/cve-2005-0356): 83%, Medium (CVSS 5.0) - [CVE-2004-1305](https://www.precursorintelligence.com/what-is/cve-2004-1305): 59%, Medium (CVSS 5.0) - [CVE-2004-0839](https://www.precursorintelligence.com/what-is/cve-2004-0839): 34%, Medium (CVSS 5.0) - [CVE-2004-1319](https://www.precursorintelligence.com/what-is/cve-2004-1319): 27%, Medium (CVSS 5.0) - [CVE-2002-0540](https://www.precursorintelligence.com/what-is/cve-2002-0540): 20%, High (CVSS 7.5) - [CVE-2005-4197](https://www.precursorintelligence.com/what-is/cve-2005-4197): 12%, High (CVSS 7.5) - [CVE-2004-2549](https://www.precursorintelligence.com/what-is/cve-2004-2549): 10%, Medium (CVSS 5.0) - [CVE-2007-5636](https://www.precursorintelligence.com/what-is/cve-2007-5636): 6.7%, High (CVSS 7.5) - [CVE-2000-0221](https://www.precursorintelligence.com/what-is/cve-2000-0221): 5.3%, Medium (CVSS 5.0) - [CVE-2003-1115](https://www.precursorintelligence.com/what-is/cve-2003-1115): 4.7%, High (CVSS 7.5) ## All Nortel products we track 25 products with at least one tracked version, most vulnerabilities first: - [Contivity](https://www.precursorintelligence.com/product/nortel/contivity): 9 vulnerabilities, 16 versions - [Multimedia Communication Server 5100](https://www.precursorintelligence.com/product/nortel/multimedia_communication_server_5100): 5 vulnerabilities, 1 version - [Business Communications Manager](https://www.precursorintelligence.com/product/nortel/business_communications_manager): 5 vulnerabilities, 8 versions - [Communications Server](https://www.precursorintelligence.com/product/nortel/communications_server): 5 vulnerabilities, 4 versions - [Cs1000](https://www.precursorintelligence.com/product/nortel/cs1000): 4 vulnerabilities, 1 version - [Meridian Sl100](https://www.precursorintelligence.com/product/nortel/meridian_sl100): 3 vulnerabilities, 1 version - [Callpilot](https://www.precursorintelligence.com/product/nortel/callpilot): 2 vulnerabilities, 4 versions - [SSL VPN](https://www.precursorintelligence.com/product/nortel/ssl_vpn): 1 vulnerability, 2 versions - [Alteon 2424 Application Switch](https://www.precursorintelligence.com/product/nortel/alteon_2424_application_switch): 1 vulnerability, 1 version - [Alteon Acedirector](https://www.precursorintelligence.com/product/nortel/alteon_acedirector): 1 vulnerability, 1 version - [Callpilot Server](https://www.precursorintelligence.com/product/nortel/callpilot_server): 1 vulnerability, 1 version - [Cvx 1800 Multi-Service Access Switch](https://www.precursorintelligence.com/product/nortel/cvx_1800_multi-service_access_switch): 1 vulnerability, 1 version - [Media Communication Server 5100](https://www.precursorintelligence.com/product/nortel/media_communication_server_5100): 1 vulnerability, 1 version - [Media Communication Server 5200](https://www.precursorintelligence.com/product/nortel/media_communication_server_5200): 1 vulnerability, 1 version - [Net Direct Client](https://www.precursorintelligence.com/product/nortel/net_direct_client): 1 vulnerability, 1 version - [Optivity Net Architect](https://www.precursorintelligence.com/product/nortel/optivity_net_architect): 1 vulnerability, 1 version - [Pc Client Soft Phone SIP](https://www.precursorintelligence.com/product/nortel/pc_client_soft_phone_sip): 1 vulnerability, 1 version - [SIP Multimedia Pc Client](https://www.precursorintelligence.com/product/nortel/sip_multimedia_pc_client): 1 vulnerability, 1 version - [SIP Softphone](https://www.precursorintelligence.com/product/nortel/sip_softphone): 1 vulnerability, 1 version - [Survivable Remote Gateway](https://www.precursorintelligence.com/product/nortel/survivable_remote_gateway): 1 vulnerability, 1 version - [Unistim IP Phone](https://www.precursorintelligence.com/product/nortel/unistim_ip_phone): 1 vulnerability, 1 version - [Universal Signaling Point](https://www.precursorintelligence.com/product/nortel/universal_signaling_point): 1 vulnerability, 2 versions - [VOIP-Core-Cs](https://www.precursorintelligence.com/product/nortel/voip-core-cs): 1 vulnerability, 3 versions - [Helmsman](https://www.precursorintelligence.com/product/nortel/helmsman): 0 vulnerabilities, 2 versions - [Preside Site Manager](https://www.precursorintelligence.com/product/nortel/preside_site_manager): 0 vulnerabilities, 1 version ## Questions ### How many vulnerabilities does Nortel have? Our catalogue lists 44 published vulnerabilities across 104 products and 58 versions from Nortel. ### Which Nortel vulnerabilities are being exploited? None of Nortel's vulnerabilities is on the list of flaws known to be exploited today. ### Which Nortel product has the most vulnerabilities? Contivity, with 9 published vulnerabilities. Its own page lists the ones known to be exploited. ### How do I get alerts for new Nortel vulnerabilities? Create a Precursor Intelligence account and track the Nortel products you run. We match them against every published flaw, give each one a risk score from 0 to 100 and tell you as soon as we spot one that affects you, by email, in the app or by webhook. ## Running Nortel? Precursor Intelligence keeps checking for you: - **Tell us what you run.** Pick your software from a list, or let us work it out from your website. - **We match it to every flaw.** Over 400,000 published flaws, checked against your list. - **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it. - **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools. Start free (no card, nothing to install): https://www.precursorintelligence.com/register Book a demo: https://www.precursorintelligence.com/contact