How severe is CVE-2007-5636?

CVE-2007-5636 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2007-5636 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-5636?

CVE-2007-5636 affects Nortel Ip Softphone 2050. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2007-5636?

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-2007-5636 published?

CVE-2007-5636 was published on 2007-10-23 and last updated on 2026-06-16.

CVE-2007-5636

CVE-2007-5636 is a high-severity vulnerability in Nortel Ip Softphone 2050 with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 7% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Nortel Ip Softphone 2050
Published: 2007-10-23
Last modified: 2026-06-16

Description

Buffer overflow in the Nortel UNIStim IP Softphone 2050 allows remote attackers to cause a denial of service (application abort) and possibly execute arbitrary code via a flood of invalid characters to the RTCP port (5678/udp) that triggers a Windows error message, aka "extraneous messaging."

Frequently asked questions

What is CVE-2007-5636?: Buffer overflow in the Nortel UNIStim IP Softphone 2050 allows remote attackers to cause a denial of service (application abort) and possibly execute arbitrary code via a flood of invalid characters to the RTCP port (5678/udp) that triggers a Windows error message, aka "extraneous messaging."
How severe is CVE-2007-5636?: CVE-2007-5636 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2007-5636 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-5636?: CVE-2007-5636 affects Nortel Ip Softphone 2050. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2007-5636?: 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-2007-5636 published?: CVE-2007-5636 was published on 2007-10-23 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:nortel:ip_softphone_2050:*:*:*:*:*:*:*:*

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