Security readout for executives and security teams
Cisco Unity Connection had an SMTP relay flaw that could let an unauthenticated remote attacker use the system to send unwanted email to arbitrary recipients. The main business risk is email abuse, reputation damage, blocklisting, and operational noise rather than direct system takeover based on the provided sources. Organizations running Cisco Unity Connection with SMTP relay reachable by untrusted networks are the most likely exposed. The source bundle does not provide affected version ranges, fixed versions, or configuration prerequisites beyond the product name. Prioritize review if Cisco Unity Connection handles enterprise voicemail or mail workflows and can be reached from untrusted networks. The likely impact is abuse of corporate mail infrastructure, reputation loss, and delivery disruption, not confirmed data compromise from the provided evidence. Mitigation focus: Check Cisco advisory cisco-sa-20180221-cuc for affected releases and vendor remediation guidance.; Inventory Cisco Unity Connection deployments and ownership.; Restrict SMTP relay exposure to trusted mail systems where operationally possible..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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Open ATT&CK lookupCVE-2018-0203 mapping review
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Open ATT&CK lookup- Severity
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- CVSS
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- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180221-cucCVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
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Data Processing Errors
Data Processing Errors represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.