CVE-2007-5638

mediumpriority · track · 18EPSS 0.015 · 74 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.47% (74th) EPSS

CVSS 4.3 · medium

Is it mine?

17 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-27

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, use only 65536 different values in the 32-bit ID number field of an RUDP datagram, which makes it easier for remote attackers to guess the RUDP ID and spoof messages. NOTE: this can be leveraged for an eavesdropping attack by sending many Open Audio Stream messages.

cvss

Technical severity, 0–10. One row per scoring source.

4.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.7–4.3

v2.04.3mediumAV:N/AC:M/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v2.03.7lowAV:N/AC:M/Au:N/C:P/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-200USprimaryCWE-310USprimary

affected products (17)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
nortel business communications manager= 1000nvdUScpe:2.3:a:nortel:business_communications_manager:*:*:*:*:*:*:*:*
nortel business communications manager= 200nvdUScpe:2.3:a:nortel:business_communications_manager:*:*:*:*:*:*:*:*
nortel business communications manager= 400nvdUScpe:2.3:a:nortel:business_communications_manager:*:*:*:*:*:*:*:*
nortel business communications manager= 50nvdUScpe:2.3:a:nortel:business_communications_manager:*:*:*:*:*:*:*:*
nortel business communications manager= 50anvdUScpe:2.3:a:nortel:business_communications_manager:*:*:*:*:*:*:*:*
nortel business communications manager= 50envdUScpe:2.3:a:nortel:business_communications_manager:*:*:*:*:*:*:*:*
nortel business communications manager= srg200nvdUScpe:2.3:a:nortel:business_communications_manager:*:*:*:*:*:*:*:*
nortel business communications manager= srg50nvdUScpe:2.3:a:nortel:business_communications_manager:*:*:*:*:*:*:*:*
nortel centrex ip client managerall versionsnvdUScpe:2.3:a:nortel:centrex_ip_client_manager:*:*:*:*:*:*:*:*
nortel centrex ip element managerall versionsnvdUScpe:2.3:a:nortel:centrex_ip_element_manager:*:*:*:*:*:*:*:*
nortel meridian option 11call versionsnvdUScpe:2.3:a:nortel:meridian_option_11c:*:*:*:*:*:*:*:*
nortel meridian option 51call versionsnvdUScpe:2.3:a:nortel:meridian_option_51c:*:*:*:*:*:*:*:*
nortel meridian option 61call versionsnvdUScpe:2.3:a:nortel:meridian_option_61c:*:*:*:*:*:*:*:*
nortel meridian option 81call versionsnvdUScpe:2.3:a:nortel:meridian_option_81c:*:*:*:*:*:*:*:*
nortel meridian sl100= cs2100nvdUScpe:2.3:a:nortel:meridian_sl100:*:*:*:*:*:*:*:*
nortel mobile voice client 2050all versionsnvdUScpe:2.3:a:nortel:mobile_voice_client_2050:*:*:*:*:*:*:*:*

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd NVD CVE.org MITRE

published 2007-10-23modified 2026-06-16

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+22218 more

references (16)

External citations — patches, advisories, analysis.

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