This vulnerability is due to an inadequate implementation of rate-limiting on incoming network connections. An attacker could exploit this vulnerability by sending a large number of connection requests to an affected system. A successful exploit could allow the attacker to exhaust available connection resources, causing Cisco CNC and Cisco NSO to become unresponsive and resulting in a DoS condition for legitimate users and dependent services. A manual reboot of the system is required to recover from this condition.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| Cisco | Cisco Crosswork Network Change Automation | unknown |
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| Cisco | Cisco Network Services Orchestrator | unknown |
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Project Subscriptions
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Solution
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Workaround
No workaround given by the vendor.
Wed, 06 May 2026 16:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A vulnerability in the connection-handling mechanism of Cisco Crosswork Network Controller (CNC) and Cisco Network Services Orchestrator (NSO) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected system. This vulnerability is due to an inadequate implementation of rate-limiting on incoming network connections. An attacker could exploit this vulnerability by sending a large number of connection requests to an affected system. A successful exploit could allow the attacker to exhaust available connection resources, causing Cisco CNC and Cisco NSO to become unresponsive and resulting in a DoS condition for legitimate users and dependent services. A manual reboot of the system is required to recover from this condition. | |
| Title | Cisco Crosswork Network Controller and Cisco Network Services Orchestrator Connection Exhaustion Denial of Service Vulnerability | |
| Weaknesses | CWE-400 | |
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| Metrics |
cvssV3_1
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Projects
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MITRE
Status: PUBLISHED
Assigner: cisco
Published:
Updated: 2026-05-06T17:48:12.690Z
Reserved: 2025-10-08T11:59:15.394Z
Link: CVE-2026-20188
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-05-06T17:16:21.190
Modified: 2026-05-06T17:16:21.190
Link: CVE-2026-20188
Redhat
No data.
OpenCVE Enrichment
Updated: 2026-05-06T17:30:08Z