Cisco 600 series routers running CBOS 2.0.1 through 2.4.2ap allows remote attackers to cause a denial of service via multiple connections to the router on the (1) HTTP or (2) telnet service, which causes the router to become unresponsive and stop forwarding packets
Published Feb 2, 2002
5.0
MEDIUMCVSS 2.0
EPSS 5.37%
Description
Cisco 600 series routers running CBOS 2.0.1 through 2.4.2ap allows remote attackers to cause a denial of service via multiple connections to the router on the (1) HTTP or (2) telnet service, which causes the router to become unresponsive and stop forwarding packets.
Affected products
No data.
- ≤ 2.4.2ap
- 2.0.1
- 2.1.0
- 2.1.0a
- 2.2.0
- 2.2.1
- 2.2.1a
- 2.3
- 2.3.2
- 2.3.5
- 2.3.7
- 2.3.8
- 2.3.9
- 2.4.1
- 2.4.2
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: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 (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 5.37% (0.05369) | 92.40th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.37% (0.05369) | 91.59th | v5 (v2026.06.15) |
| Dec 9, 2025 | 12.58% (0.12583) | 93.69th | v4 (v2025.03.14) |
| Dec 2, 2025 | 8.86% (0.08858) | 92.27th | v4 (v2025.03.14) |
| Oct 2, 2025 | 7.61% (0.07612) | 91.53th | v4 (v2025.03.14) |
| Mar 30, 2025 | 5.67% (0.05670) | 89.44th | v4 (v2025.03.14) |
| Mar 29, 2025 | 8.76% (0.08760) | 87.30th | v4 (v2025.03.14) |
| Mar 17, 2025 | 5.62% (0.05615) | 89.64th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.78% (0.00778) | 82.05th | v3 (v2023.03.01) |
| Mar 2, 2024 | 0.78% (0.00778) | 80.88th | v3 (v2023.03.01) |
| Jun 13, 2023 | 0.78% (0.00778) | 78.87th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.95% (0.00948) | 80.78th | v3 (v2023.03.01) |
| Mar 6, 2023 | 4.19% (0.04187) | 87.39th | v2 (v2022.01.01) |
| Apr 1, 2022 | 4.19% (0.04187) | 86.11th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.19% (0.04187) | 69.86th | v2 (v2022.01.01) |
No CWE recorded.
References (4)
- http://www.cisco.com/warp/public/707/cisco-cbos-webserver-pub.shtml vendor-advisoryx_refsource_CISCOPatchVendor Advisory
- http://www.securityfocus.com/bid/3236 vdb-entryx_refsource_BIDExploitPatchVendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/7025 vdb-entryx_refsource_XF
- https://exchange.xforce.ibmcloud.com/vulnerabilities/7026 vdb-entryx_refsource_XF
| Link | Providers | Tags |
|---|---|---|
| http://www.cisco.com/warp/public/707/cisco-cbos-webserver-pub.shtml | vendor-advisoryx_refsource_CISCOPatchVendor Advisory | |
| http://www.securityfocus.com/bid/3236 | vdb-entryx_refsource_BIDExploitPatchVendor Advisory | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/7025 | vdb-entryx_refsource_XF | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/7026 | vdb-entryx_refsource_XF |
Change history (0)
No recorded changes yet.