THREATPORT/VULNERABILITY/CVE-2007-4459
HIGH SEVERITY

CVE-2007-4459

Voip Phone Cp 7940 vulnerability

CVSS
7.1
EPSS
14.0%
EPSS pct
96th
Exploited
No known
Cisco IP Phone 7940 and 7960 with P0S3-08-6-00 firmware, and other SIP firmware before 8.7(0), allows remote attackers to cause a denial of service (device reboot) via (1) a certain sequence of 10 invalid SIP INVITE and OPTIONS messages; or (2) a certain invalid SIP INVITE message that contains a remote tag, followed by a certain set of two related SIP OPTIONS messages.
Affected vendor
Cisco
Affected product
Voip Phone Cp 7940
CVSS vector
AV:N/AC:M/Au:N/C:N/I:N/A:C
Weakness type (CWE)
  • CWE-20 — Improper Input Validation
Published
2007-08-21

Risk analysis

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

Its EPSS score of 14.0% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 96% of all scored CVEs.

Check your external exposure to CVE-2007-4459

  • Confirm whether Cisco Voip Phone Cp 7940 is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2007-4459.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2007-4459

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2007-4459 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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