How severe is CVE-2007-5637?

CVE-2007-5637 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2007-5637 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-5637?

CVE-2007-5637 primarily affects Nortel Business Communications Manager. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-5637?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2007-5637 published?

CVE-2007-5637 was published on 2007-10-23 and last updated on 2026-06-16.

CVE-2007-5637

CVE-2007-5637 is a medium-severity vulnerability in Nortel Business Communications Manager with a CVSS 2.0 base score of 4.3. 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-200.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Nortel Business Communications Manager
Published: 2007-10-23
Last modified: 2026-06-16

Description

The Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and additional Nortel products from the IP Phone, Business Communications Manager (BCM), and other product lines allow remote attackers to eavesdrop on the physical environment via an Open Audio Stream message that enables "surveillance mode." NOTE: issues relating to a small ID number space can be leveraged to make this attack easier.

Frequently asked questions

What is CVE-2007-5637?: The Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and additional Nortel products from the IP Phone, Business Communications Manager (BCM), and other product lines allow remote attackers to eavesdrop on the physical environment via an Open Audio Stream message that enables "surveillance mode." NOTE: issues relating to a small ID number space can be leveraged to make this attack easier.
How severe is CVE-2007-5637?: CVE-2007-5637 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2007-5637 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-5637?: CVE-2007-5637 primarily affects Nortel Business Communications Manager. In total, 16 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2007-5637?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2007-5637 published?: CVE-2007-5637 was published on 2007-10-23 and last updated on 2026-06-16.

References

Affected products (16)

cpe:2.3:a:nortel:business_communications_manager:50:*:*:*:*:*:*:*
cpe:2.3:a:nortel:business_communications_manager:50a:*:*:*:*:*:*:*
cpe:2.3:a:nortel:business_communications_manager:50e:*:*:*:*:*:*:*
cpe:2.3:a:nortel:business_communications_manager:200:*:*:*:*:*:*:*
cpe:2.3:a:nortel:business_communications_manager:400:*:*:*:*:*:*:*
cpe:2.3:a:nortel:business_communications_manager:1000:*:*:*:*:*:*:*
cpe:2.3:a:nortel:business_communications_manager:srg50:*:*:*:*:*:*:*
cpe:2.3:a:nortel:business_communications_manager:srg200:*:*:*:*:*:*:*
cpe:2.3:a:nortel:centrex_ip_client_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:nortel:centrex_ip_element_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:nortel:meridian_option_11c:*:*:*:*:*:*:*:*
cpe:2.3:a:nortel:meridian_option_51c:*:*:*:*:*:*:*:*
cpe:2.3:a:nortel:meridian_option_61c:*:*:*:*:*:*:*:*
cpe:2.3:a:nortel:meridian_option_81c:*:*:*:*:*:*:*:*
cpe:2.3:a:nortel:meridian_sl100:cs2100:*:*:*:*:*:*:*
cpe:2.3:a:nortel:mobile_voice_client_2050:*:*:*:*:*:*:*:*

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