Cisco Adaptive Security Appliances (ASA) 5500 series devices with software before 8.2(3) do not properly handle Online Certificate Status Protocol (OCSP) connection failures, which allows remote OCSP responders to cause a denial of service (TCP socket exhaustion) by rejecting connection attempts, aka Bug ID CSCsz36816
Published Jan 7, 2011
7.8
HIGHCVSS 2.0
EPSS 1.14%
Description
Cisco Adaptive Security Appliances (ASA) 5500 series devices with software before 8.2(3) do not properly handle Online Certificate Status Protocol (OCSP) connection failures, which allows remote OCSP responders to cause a denial of service (TCP socket exhaustion) by rejecting connection attempts, aka Bug ID CSCsz36816.
Affected products
No data.
- ≤ 8.2\(2\)
- 7.0
- 7.0\(0\)
- 7.0\(2\)
- 7.0\(4\)
- 7.0\(5\)
- 7.0\(5.2\)
- 7.0\(6.7\)
- 7.0.1
- 7.0.1.4
- 7.0.2
- 7.0.4
- 7.0.4.3
- 7.0.5
- 7.0.6
- 7.0.7
- 7.0.8
- 7.0.8
- 7.1
- 7.1\(2\)
- 7.1\(2.5\)
- 7.1\(2.27\)
- 7.1\(2.48\)
- 7.1\(2.49\)
- 7.1\(5\)
- 7.1.1
- 7.1.2
- 7.2
- 7.2\(1\)
- 7.2\(1.22\)
- 7.2\(2\)
- 7.2\(2.5\)
- 7.2\(2.7\)
- 7.2\(2.8\)
- 7.2\(2.10\)
- 7.2\(2.14\)
- 7.2\(2.15\)
- 7.2\(2.16\)
- 7.2\(2.17\)
- 7.2\(2.18\)
- 7.2\(2.19\)
- 7.2\(2.48\)
- 7.2.1
- 7.2.2
- 7.2.3
- 7.2.4
- 7.2.5
- 8.0
- 8.0.2
- 8.0.3
- 8.0.4
- 8.0.5
- 8.2\(1\)
- 8.2.1
- 8.2.2
- 8.2.2
- n/a
- n/a
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: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 (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.14% (0.01140) | 65.42th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.13% (0.01130) | 62.07th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.34% (0.00340) | 54.52th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.37% (0.00374) | 73.60th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.37% (0.00374) | 71.97th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.37% (0.00374) | 68.45th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.02% (0.01018) | 38.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
References (5)
- http://secunia.com/advisories/42931 third-party-advisoryx_refsource_SECUNIA
- http://www.cisco.com/en/US/docs/security/asa/asa82/release/notes/asarn82.pdf x_refsource_CONFIRM
- http://www.securityfocus.com/bid/45767 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id?1024963 vdb-entryx_refsource_SECTRACK
- https://exchange.xforce.ibmcloud.com/vulnerabilities/64605 vdb-entryx_refsource_XF
| Link | Providers | Tags |
|---|---|---|
| http://secunia.com/advisories/42931 | third-party-advisoryx_refsource_SECUNIA | |
| http://www.cisco.com/en/US/docs/security/asa/asa82/release/notes/asarn82.pdf | x_refsource_CONFIRM | |
| http://www.securityfocus.com/bid/45767 | vdb-entryx_refsource_BID | |
| http://www.securitytracker.com/id?1024963 | vdb-entryx_refsource_SECTRACK | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/64605 | vdb-entryx_refsource_XF |
Change history (0)
No recorded changes yet.