How severe is CVE-2007-3438?

CVE-2007-3438 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2007-3438 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-3438?

CVE-2007-3438 affects Nortel Sip Softphone. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2007-3438?

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-2007-3438 published?

CVE-2007-3438 was published on 2007-06-27 and last updated on 2026-06-16.

CVE-2007-3438

CVE-2007-3438 is a high-severity vulnerability in Nortel Sip Softphone with a CVSS 2.0 base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 2% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Nortel Sip Softphone
Published: 2007-06-27
Last modified: 2026-06-16

Description

Buffer overflow in the SIP header parsing module in the Nortel PC Client SIP Soft Phone 4.1 3.5.208[20051015] allows remote attackers to execute arbitrary code via a malformed message, a different vulnerability than CVE-2007-3361.

Frequently asked questions

What is CVE-2007-3438?: Buffer overflow in the SIP header parsing module in the Nortel PC Client SIP Soft Phone 4.1 3.5.208[20051015] allows remote attackers to execute arbitrary code via a malformed message, a different vulnerability than CVE-2007-3361.
How severe is CVE-2007-3438?: CVE-2007-3438 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2007-3438 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-3438?: CVE-2007-3438 affects Nortel Sip Softphone. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2007-3438?: 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-2007-3438 published?: CVE-2007-3438 was published on 2007-06-27 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:nortel:sip_softphone:4.13.5.208:*:*:*:*:*:*:*