A vulnerability in the Cisco Discovery Protocol (formerly known as CDP) subsystem of devices running, or based on, Cisco NX-OS Software contain a vulnerability that could allow an unauthenticated, adjacent attacker to create a denial of service (DoS) condition
Published Jun 21, 2018
6.5
MEDIUMCVSS 3.1
EPSS 0.64%
Description
A vulnerability in the Cisco Discovery Protocol (formerly known as CDP) subsystem of devices running, or based on, Cisco NX-OS Software contain a vulnerability that could allow an unauthenticated, adjacent attacker to create a denial of service (DoS) condition. The vulnerability is due to a failure to properly validate certain fields within a Cisco Discovery Protocol message prior to processing it. An attacker with the ability to submit a Cisco Discovery Protocol message designed to trigger the issue could cause a DoS condition on an affected device while the device restarts. This vulnerability affects Firepower 4100 Series Next-Generation Firewall, Firepower 9300 Security Appliance, MDS 9000 Series Multilayer Director Switches, Nexus 1000V Series Switches, Nexus 1100 Series Cloud Services Platforms, Nexus 2000 Series Switches, Nexus 3000 Series Switches, Nexus 3500 Platform Switches, Nexus 3600 Platform Switches, Nexus 5500 Platform Switches, Nexus 5600 Platform Switches, Nexus 6000 Series Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches, Nexus 9000 Series Switches in NX-OS mode, Nexus 9500 R-Series Line Cards and Fabric Modules, UCS 6100 Series Fabric Interconnects, UCS 6200 Series Fabric Interconnects, UCS 6300 Series Fabric Interconnects. Cisco Bug IDs: CSCvc89242, CSCve40943, CSCve40953, CSCve40965, CSCve40970, CSCve40978, CSCve40992, CSCve41000, CSCve41007.
Affected products
- Vendor n/a Product Cisco FXOS, NX-OS, and UCS Manager unknown Defaultn/a
- Version Cisco FXOS, NX-OS, and UCS Manager unknownStatusaffectedConstraints-
- 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 FXOS, NX-OS, and UCS Manager unknown | n/a |
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Configuration 1
Running on/with
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Configuration 2
Configuration 3
Running on/with
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Configuration 4
Running on/with
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Configuration 5
Running on/with
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Configuration 6
Configuration 7
Running on/with
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Configuration 8
- ≥ 1.1 · < 2.0.1.153
- ≥ 2.1.1 · < 2.1.1.86
- ≥ 2.2.1 · < 2.2.1.70
- ≥ 2.2.2 · < 2.2.2.14
Running on/with
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Configuration 9
- ≥ 2.1.1 · < 2.1.1.86
- ≥ 2.2.1 · < 2.2.1.70
- ≥ 1.1 · < 2.0.1.152
- ≥ 2.2.2 · < 2.2.2.14
Running on/with
- 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.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:A/AC:L/Au:N/C:N/I:N/A:C
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Nov 29, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.64% (0.00640) | 48.78th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.64% (0.00640) | 49.24th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.06% (0.00056) | 23.96th | v3 (v2023.03.01) |
| Apr 30, 2024 | 0.06% (0.00056) | 22.30th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.06% (0.00055) | 20.03th | v3 (v2023.03.01) |
| Nov 12, 2023 | 0.07% (0.00072) | 30.01th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00063) | 25.40th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.78% (0.00777) | 21.50th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.78% (0.00777) | 0.00th | v1 |
References (2)
- http://www.securitytracker.com/id/1041169 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-nxos-cdp x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securitytracker.com/id/1041169 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-nxos-cdp | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.