How severe is CVE-2007-4459?

CVE-2007-4459 has a CVSS 2.0 base score of 7.1, rated high severity.

Is CVE-2007-4459 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-4459?

CVE-2007-4459 primarily affects Cisco Voip Phone Cp-7940. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-4459?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2007-4459 published?

CVE-2007-4459 was published on 2007-08-21 and last updated on 2026-06-16.

CVE-2007-4459

CVE-2007-4459 is a high-severity vulnerability in Cisco Voip Phone Cp-7940 with a CVSS 2.0 base score of 7.1. Its EPSS exploit-prediction score of 14% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 2.0 base score 7.1)
EPSS exploit prediction: 14% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Voip Phone Cp-7940
Published: 2007-08-21
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2007-4459?: 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.
How severe is CVE-2007-4459?: CVE-2007-4459 has a CVSS 2.0 base score of 7.1, rated high severity.
Is CVE-2007-4459 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-4459?: CVE-2007-4459 primarily affects Cisco Voip Phone Cp-7940. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2007-4459?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2007-4459 published?: CVE-2007-4459 was published on 2007-08-21 and last updated on 2026-06-16.

References

Affected products (6)

cpe:2.3:h:cisco:voip_phone_cp-7940:*:p0s3-08-6-00_firmware:*:*:*:*:*:*
cpe:2.3:h:cisco:voip_phone_cp-7940:3.0:p0s3-08-6-00_firmware:*:*:*:*:*:*
cpe:2.3:h:cisco:voip_phone_cp-7940:3.1:p0s3-08-6-00_firmware:*:*:*:*:*:*
cpe:2.3:h:cisco:voip_phone_cp-7940:3.2:p0s3-08-6-00_firmware:*:*:*:*:*:*
cpe:2.3:h:cisco:voip_phone_cp-7940:8.6:p0s3-08-6-00_firmware:*:*:*:*:*:*
cpe:2.3:h:cisco:voip_phone_cp-7960:*:p0s3-08-6-00_firmware:*:*:*:*:*:*

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