The random-number generator on Cisco Small Business RV routers 4.x and SA500 security appliances 2.2.07 does not have sufficient entropy, which makes it easier for remote attackers to determine a TLS key pair via unspecified computations upon handshake key-exchange data, aka Bug ID CSCus15224
Published Dec 13, 2015
4.3
MEDIUMCVSS 2.0
EPSS 1.84%
Description
The random-number generator on Cisco Small Business RV routers 4.x and SA500 security appliances 2.2.07 does not have sufficient entropy, which makes it easier for remote attackers to determine a TLS key pair via unspecified computations upon handshake key-exchange data, aka Bug ID CSCus15224.
Affected products
No data.
Configuration 2
- 4.0.0.7
- 4.0.2.8
- 4.0.5.0
- 4.0.2.8
- 4.0.0.7
- 4.2.2.7
- 4.2.2.8
- 4.0.0.7
- 4.0.2.8
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:P/I:N/A:N
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 | 1.84% (0.01836) | 78.15th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.84% (0.01836) | 76.08th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.57% (0.00575) | 66.82th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.32% (0.00318) | 71.35th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.32% (0.00318) | 69.68th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.32% (0.00318) | 65.74th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.21% (0.01213) | 66.61th | v2 (v2022.01.01) |
| Feb 17, 2023 | 1.21% (0.01213) | 66.22th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.21% (0.01213) | 64.21th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.21% (0.01213) | 40.54th | v2 (v2022.01.01) |
References (4)
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151210-dwvr vendor-advisoryx_refsource_CISCOVendor Advisory
- http://www.securityfocus.com/bid/78876 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1034408 vdb-entryx_refsource_SECTRACK
- http://www.securitytracker.com/id/1034409 vdb-entryx_refsource_SECTRACK
| Link | Providers | Tags |
|---|---|---|
| http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151210-dwvr | vendor-advisoryx_refsource_CISCOVendor Advisory | |
| http://www.securityfocus.com/bid/78876 | vdb-entryx_refsource_BID | |
| http://www.securitytracker.com/id/1034408 | vdb-entryx_refsource_SECTRACK | |
| http://www.securitytracker.com/id/1034409 | vdb-entryx_refsource_SECTRACK |
Change history (0)
No recorded changes yet.