Security readout for executives and security teams
CVE-2006-0737 is a denial-of-service issue in the eStara SIP softphone. A malformed SIP OPTIONS message with a negative Expires value can crash the application. The business risk is service disruption, especially where legacy softphone systems remain in call-center or voice workflows. Exposure is most likely in legacy environments still running eStara SIP softphone and accepting SIP traffic from untrusted or weakly controlled networks. The source bundle does not identify affected versions or supported platforms. Treat this as a targeted legacy-technology risk, not a broad emergency. Prioritize if eStara softphone is still used in customer-facing voice operations or exposed to external SIP traffic. Mitigation focus: Inventory endpoints and call-center images for legacy eStara SIP softphone installations.; Check archived vendor or advisory guidance for fixed versions or replacement recommendations.; Restrict SIP traffic to trusted peers, VPNs, or controlled voice network segments..
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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CVE-2006-0737 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- 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
- estara-neg-integer-dos(24677)CVE reference · vdb-entry, x_refsource_XF
Products and packages named in the record
CWE details
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