CVE-2007-1820: n/a vulnerability

CVE-2007-1820: Nortel Networks CallPilot and Meridian Mail voicemail systems, when a mailbox has auto logon enabled, allow...

Nortel Networks CallPilot and Meridian Mail voicemail systems, when a mailbox has auto logon enabled, allow remote attackers to retrieve or remove messages, or reconfigure the mailbox, by spoofing Calling Number Identification (CNID, aka Caller ID).

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 13:06 UTC (UTC+00:00)

Security readout for executives and security teams

This issue affects Nortel CallPilot and Meridian Mail voicemail when mailbox auto logon trusts Caller ID. A remote caller who spoofs the expected calling number could access a mailbox, listen to or delete messages, or change mailbox settings. Exposure depends on whether these legacy voicemail systems and auto logon remain in use. Most likely exposure is legacy Nortel CallPilot or Meridian Mail deployments with auto logon enabled on one or more mailboxes, especially where external callers can reach voicemail prompts that process CNID. Prioritize this if legacy Nortel voicemail remains business-critical or contains sensitive messages. The main risk is unauthorized voicemail access, deletion, and mailbox manipulation. If these systems are retired or auto logon is disabled, urgency is lower. Mitigation focus: Check Nortel or successor vendor guidance for supported fixes or configuration changes.; Inventory CallPilot and Meridian Mail systems still in operation.; Identify mailboxes configured with auto logon based on CNID..

Prepared: Jun 29, 2026, 06:24 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Apr 2, 2007, 23:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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1Source links

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Source materials

CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

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