A vulnerability in the Slowpath of StarOS for Cisco ASR 5500 Series routers with Data Processing Card 2 (DPC2) could allow an unauthenticated, remote attacker to cause a subset of the subscriber sessions to be disconnected, resulting in a partial denial of service (DoS) condition
Published Nov 3, 2016
7.5
HIGHCVSS 3.0
EPSS 1.75%
Description
A vulnerability in the Slowpath of StarOS for Cisco ASR 5500 Series routers with Data Processing Card 2 (DPC2) could allow an unauthenticated, remote attacker to cause a subset of the subscriber sessions to be disconnected, resulting in a partial denial of service (DoS) condition. This vulnerability affects Cisco ASR 5500 devices with Data Processing Card 2 (DPC2) running StarOS 18.0 or later. More Information: CSCvb12081. Known Affected Releases: 18.7.4 19.5.0 20.0.2.64048 20.2.3 21.0.0. Known Fixed Releases: 18.7.4 18.7.4.65030 18.8.M0.65044 19.5.0 19.5.0.65092 19.5.M0.65023 19.5.M0.65050 20.2.3 20.2.3.64982 20.2.3.65017 20.2.a4.65307 20.3.M0.64984 20.3.M0.65029 20.3.M0.65037 20.3.M0.65071 20.3.T0.64985 20.3.T0.65031 20.3.T0.65043 20.3.T0.65067 21.0.0 21.0.0.65256 21.0.M0.64922 21.0.M0.64983 21.0.M0.65140 21.0.V0.65150 21.1.A0.64932 21.1.A0.64987 21.1.A0.65145 21.1.PP0.65270 21.1.R0.65130 21.1.R0.65135 21.1.R0.65154 21.1.VC0.65203 21.2.A0.65147.
Affected products
- Vendor n/a Product Cisco StarOS 18.x through 21.x Defaultn/a
- Version Cisco StarOS 18.x through 21.xStatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Cisco StarOS 18.x through 21.x | n/a |
|
- 18.0.0
- 18.0.0.57828
- 18.0.0.59167
- 18.0.0.59211
- 18.0.l0.59219
- 18.1.0
- 18.1.0.59776
- 18.1.0.59780
- 18.1_base
- 18.3.0
- 18.3_base
- 18.4.0
- 19.0.1
- 19.0.m0.60737
- 19.0.m0.60828
- 19.0.m0.61045
- 19.1.0
- 19.1.0.61559
- 19.2.0
- 19.3.0
- 20.0.0
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.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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 (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.75% (0.01747) | 76.98th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.75% (0.01747) | 74.81th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.60% (0.00598) | 67.55th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.56% (0.00563) | 78.47th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.56% (0.00563) | 77.04th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.56% (0.00563) | 74.33th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.14% (0.01136) | 59.45th | v2 (v2022.01.01) |
| Oct 18, 2022 | 1.14% (0.01136) | 58.28th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.14% (0.01136) | 56.27th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.14% (0.01136) | 34.23th | v2 (v2022.01.01) |
References (3)
- http://www.securityfocus.com/bid/94071 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1037186 vdb-entryx_refsource_SECTRACK
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161102-asr x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/94071 | vdb-entryx_refsource_BID | |
| http://www.securitytracker.com/id/1037186 | vdb-entryx_refsource_SECTRACK | |
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161102-asr | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.