THREATPORT/VULNERABILITY/CVE-2006-0738
MEDIUM SEVERITY

CVE-2006-0738

Softphone vulnerability

CVSS
5.0
EPSS
3.1%
EPSS pct
86th
Exploited
No known
Multiple format string vulnerabilities in eStara SIP softphone allow remote attackers to cause a denial of service (hang) via SIP INVITE requests with format string specifiers in the SDP session description, as demonstrated using (1) the field name, (2) the o field (owner/creator and session identifier), or (3) the m field (media name and transport address).
Affected vendor
Estara
Affected product
Softphone
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Published
2006-02-17

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to partial impact to availability.

Its EPSS score of 3.1% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 86% of all scored CVEs.

Check your external exposure to CVE-2006-0738

  • Confirm whether Estara Softphone is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2006-0738.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2006-0738

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2006-0738 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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