Cisco Catalyst 6000, 5000, or 4000 switches allow remote attackers to cause a denial of service by connecting to the SSH service with a non-SSH client, which generates a protocol mismatch error
Published May 7, 2001
5.0
MEDIUMCVSS 2.0
EPSS 8.95%
Description
Cisco Catalyst 6000, 5000, or 4000 switches allow remote attackers to cause a denial of service by connecting to the SSH service with a non-SSH client, which generates a protocol mismatch error.
Affected products
No data.
- n/a
- 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: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 (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 8.95% (0.08945) | 95.10th | v5 (v2026.06.15) |
| Jun 15, 2026 | 8.95% (0.08945) | 94.56th | v5 (v2026.06.15) |
| Mar 30, 2025 | 13.38% (0.13383) | 93.57th | v4 (v2025.03.14) |
| Mar 29, 2025 | 16.97% (0.16967) | 91.68th | v4 (v2025.03.14) |
| Mar 19, 2025 | 13.38% (0.13383) | 93.34th | v4 (v2025.03.14) |
| Mar 17, 2025 | 11.49% (0.11494) | 93.06th | v4 (v2025.03.14) |
| Dec 17, 2024 | 0.95% (0.00946) | 82.92th | v3 (v2023.03.01) |
| Dec 12, 2024 | 1.98% (0.01983) | 89.27th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.98% (0.01983) | 86.96th | 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 (3)
- http://www.cisco.com/warp/public/707/catalyst-ssh-protocolmismatch-pub.shtml vendor-advisoryx_refsource_CISCOPatchVendor Advisory
- http://www.securityfocus.com/bid/2117 vdb-entryx_refsource_BID
- https://exchange.xforce.ibmcloud.com/vulnerabilities/5760 vdb-entryx_refsource_XF
| Link | Providers | Tags |
|---|---|---|
| http://www.cisco.com/warp/public/707/catalyst-ssh-protocolmismatch-pub.shtml | vendor-advisoryx_refsource_CISCOPatchVendor Advisory | |
| http://www.securityfocus.com/bid/2117 | vdb-entryx_refsource_BID | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/5760 | vdb-entryx_refsource_XF |
Change history (0)
No recorded changes yet.