Nortel SIP Multimedia PC Client 4.x MCS5100 and MCS5200 does not limit the number of concurrent sessions, which allows attackers to cause a denial of service (resource consumption) via a large number of sessions
Published Jul 11, 2008
5.0
MEDIUMCVSS 2.0
EPSS 1.42%
Description
Nortel SIP Multimedia PC Client 4.x MCS5100 and MCS5200 does not limit the number of concurrent sessions, which allows attackers to cause a denial of service (resource consumption) via a large number of sessions.
Affected products
No data.
- 4.0
- 4.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.42% (0.01416) | 71.78th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.42% (0.01416) | 69.18th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.77% (0.00766) | 71.73th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.48% (0.00478) | 76.61th | v3 (v2023.03.01) |
| Feb 15, 2024 | 0.48% (0.00478) | 75.13th | v3 (v2023.03.01) |
| Dec 15, 2023 | 0.48% (0.00478) | 73.12th | v3 (v2023.03.01) |
| Nov 8, 2023 | 0.49% (0.00494) | 73.44th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.46% (0.00458) | 71.39th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.11% (0.01108) | 55.18th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.11% (0.01108) | 53.57th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.11% (0.01108) | 51.54th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.11% (0.01108) | 29.61th | v2 (v2022.01.01) |
References (6)
- http://secunia.com/advisories/30854 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=738961 x_refsource_CONFIRM
- http://www.securitytracker.com/id?1020371 vdb-entryx_refsource_SECTRACK
- http://www.voipshield.com/research-details.php?id=61 x_refsource_MISC
- http://www.vupen.com/english/advisories/2008/1942/references vdb-entryx_refsource_VUPEN
- https://exchange.xforce.ibmcloud.com/vulnerabilities/43364 vdb-entryx_refsource_XF
| Link | Providers | Tags |
|---|---|---|
| http://secunia.com/advisories/30854 | third-party-advisoryx_refsource_SECUNIAVendor Advisory | |
| http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=738961 | x_refsource_CONFIRM | |
| http://www.securitytracker.com/id?1020371 | vdb-entryx_refsource_SECTRACK | |
| http://www.voipshield.com/research-details.php?id=61 | x_refsource_MISC | |
| http://www.vupen.com/english/advisories/2008/1942/references | vdb-entryx_refsource_VUPEN | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/43364 | vdb-entryx_refsource_XF |
Change history (0)
No recorded changes yet.