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NVD / CVE Program· CNA mitre

CVE-2007-5640: The Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and additional Nortel products from the IP Phone, Business Communications Manager (BCM

Noroxi assessment

Priority: Monitor (action score 29/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.8% (FIRST EPSS); higher than 78.8% of all records.
  • According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

The Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and additional Nortel products from the IP Phone, Business Communications Manager (BCM), Mobile Voice Client, and other product lines, allow remote attackers to block calls and force re-registration via a resume message to the Signaling Server that has a spoofed source IP address for the phone. NOTE: the attack is more disruptive if a new spoofed resume message is sent after each re-registration.

HighCVSS 7.1 · v2.0—No exploit No fix recorded
Published
Oct 23, 2007
Updated
Jun 16, 2026
EPSS
1.8% · 78th percentile
CWE
—

Report tools

JSON

Action score

29

Monitor

Low priority for now.

CVSS
28 / 40 · 7.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 1.8%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2007-5640

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
nortelmultimedia communication server 5100
nortelmultimedia communication server 5200
nortelcommunications server
nortelip audio conference phone 2033
nortelip phone 1110
nortelip phone 1120e
nortelip phone 1140e
nortelip phone 1150e
nortelip phone 2001
nortelip phone 2002
nortelip phone 2004
nortelip phone 2007

and 14 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • nortel business communications manager1000
  • nortel business communications manager200
  • nortel business communications manager400
  • nortel business communications manager50
  • nortel business communications manager50a
  • nortel business communications manager50e
  • nortel business communications managersrg200
  • nortel business communications managersrg50
  • nortel centrex ip client managerall versions
  • nortel centrex ip element managerall versions
  • nortel meridian option 11call versions
  • nortel meridian option 51call versions
  • nortel meridian option 61call versions
  • nortel meridian option 81call versions
  • nortel meridian sl100cs2100
  • nortel mobile voice client 2050all versions

Same product

nortel: all records

Other highest-scoring records for the same primary product.

  • CVE-2008-5872Multiple unspecified vulnerabilities in the UNIStim File Transfer Protocol (UFTP) processing in IP Client Manager (IPCM) in Nortel Multimedi
    32Monitor
  • CVE-2008-5871Nortel Multimedia Communication Server (MSC) 5100 3.0.13 does not verify credentials during call placement, which allows remote attackers to
    25Monitor
  • CVE-2007-5637The Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and additional Nortel products from the IP Phone, Business Communications Manager (BCM
    18Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2007-5638Oct 23, 2007 · The Nortel UNIStim IP Softphone 2050, IP Phone 1140E, and additional Nortel products from the IP Phone, Business Communications Manager (BCM
    17Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

    If successful

    Confidentiality
    none
    Integrity
    none
    Availability
    C · the service can be disrupted
    Attack complexity
    M
    Confidentiality impact
    None
    Integrity impact
    None
    Availability impact
    C

    Weakness class (CWE)

    —

    CVSS vector

    AV:N/AC:M/Au:N/C:N/I:N/A:C

    nvd-primary

    Attack context

    MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

    MITRE has no CAPEC/ATT&CK mapping for this CWE.

    Change log

    No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

    References

    Show all references (6 more)

    Vendor advisories and official records. Exploit/PoC links are deliberately left out.

    All records