Cisco Unified Communications Manager (Unified CM) 8.5(x) and 8.6(x) before 8.6(2a)su3 and 9.x before 9.1(1) does not properly restrict the rate of SIP packets, which allows remote attackers to cause a denial of service (memory and CPU consumption, and service disruption) via a flood of UDP packets to port 5060, aka Bug ID CSCub35869
Published Aug 25, 2013
7.1
HIGHCVSS 2.0
EPSS 1.35%
Description
Cisco Unified Communications Manager (Unified CM) 8.5(x) and 8.6(x) before 8.6(2a)su3 and 9.x before 9.1(1) does not properly restrict the rate of SIP packets, which allows remote attackers to cause a denial of service (memory and CPU consumption, and service disruption) via a flood of UDP packets to port 5060, aka Bug ID CSCub35869.
Affected products
No data.
Configuration 1
- 9.0\(1\)
Configuration 2
- 8.5
- 8.5\(1\)
- 8.5\(1\)su1
- 8.5\(1\)su2
- 8.5\(1\)su3
- 8.5\(1\)su4
- 8.5\(1\)su5
Configuration 3
- 8.6
- 8.6\(1\)
- 8.6\(1a\)
- 8.6\(2\)
- 8.6\(2a\)
- 8.6\(2a\)su1
- 8.6\(2a\)su2
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:M/Au:N/C:N/I:N/A:C
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 2, 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 (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 1.35% (0.01346) | 70.44th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.35% (0.01346) | 67.67th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.51% (0.00511) | 64.41th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.13% (0.00129) | 49.45th | v3 (v2023.03.01) |
| Jun 14, 2024 | 0.13% (0.00133) | 48.62th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.13% (0.00133) | 46.60th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.05% (0.01055) | 52.13th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.05% (0.01055) | 50.47th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.05% (0.01055) | 48.43th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.05% (0.01055) | 27.52th | v2 (v2022.01.01) |
References (2)
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130821-cucm vendor-advisoryx_refsource_CISCOVendor Advisory
- http://www.securitytracker.com/id/1028938 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
| Link | Providers | Tags |
|---|---|---|
| http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130821-cucm | vendor-advisoryx_refsource_CISCOVendor Advisory | |
| http://www.securitytracker.com/id/1028938 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry |
Change history (0)
No recorded changes yet.