Memory leak in Cisco IOS 12.4 and 15.0 through 15.2, and Cisco Unified Communications Manager (CUCM) 7.x, allows remote attackers to cause a denial of service (memory consumption) via a crafted response to a SIP SUBSCRIBE message, aka Bug IDs CSCto93837 and CSCtj61883
Published May 3, 2012
5.4
MEDIUMCVSS 2.0
EPSS 1.11%
Description
Memory leak in Cisco IOS 12.4 and 15.0 through 15.2, and Cisco Unified Communications Manager (CUCM) 7.x, allows remote attackers to cause a denial of service (memory consumption) via a crafted response to a SIP SUBSCRIBE message, aka Bug IDs CSCto93837 and CSCtj61883.
Affected products
No data.
Configuration 2
- 7.0
- 7.0\(1\)
- 7.0\(1\)su1
- 7.0\(1\)su1a
- 7.0\(2\)
- 7.0\(2a\)
- 7.0\(2a\)su1
- 7.0\(2a\)su2
- 7.0_base
- 7.1
- 7.1\(2a\)
- 7.1\(2a\)su1
- 7.1\(2b\)
- 7.1\(2b\)su1
- 7.1\(3\)
- 7.1\(3a\)
- 7.1\(3a\)su1
- 7.1\(3a\)su1a
- 7.1\(3b\)
- 7.1\(3b\)su1
- 7.1\(3b\)su2
- 7.1\(5\)
- 7.1\(5\)su1
- 7.1\(5\)su1a
- 7.1\(5a\)
- 7.1\(5b\)
- 7.1\(5b\)su1
- 7.1\(5b\)su1a
- 7.1\(5b\)su2
- 7.1\(5b\)su3
- 7.1\(5b\)su4
- 7.1\(5b\)su5
- 7.1_base
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:H/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 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 (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.11% (0.01114) | 64.81th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.13% (0.01127) | 62.00th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.43% (0.00427) | 60.26th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.20% (0.00204) | 59.26th | v3 (v2023.03.01) |
| Apr 25, 2024 | 0.16% (0.00163) | 52.32th | v3 (v2023.03.01) |
| Mar 15, 2024 | 0.15% (0.00150) | 50.15th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.14% (0.00136) | 47.70th | v3 (v2023.03.01) |
| Mar 24, 2023 | 0.20% (0.00204) | 56.62th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.26% (0.00257) | 61.68th | 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://www.cisco.com/en/US/docs/ios/15_1/release/notes/151TCAVS.html x_refsource_CONFIRM
- http://www.cisco.com/web/software/282074295/90289/cucm-readme-715bsu5.pdf x_refsource_CONFIRM
| Link | Providers | Tags |
|---|---|---|
| http://www.cisco.com/en/US/docs/ios/15_1/release/notes/151TCAVS.html | x_refsource_CONFIRM | |
| http://www.cisco.com/web/software/282074295/90289/cucm-readme-715bsu5.pdf | x_refsource_CONFIRM |
Change history (0)
No recorded changes yet.