Following the initial publication of the Security Advisory about a denial of service (DoS) condition in Cisco Crosswork Network Controller and Cisco Network Services Orchestrator (NSO), additional information has been made available to the Cisco Product Security Incident Response Team (PSIRT).
Upon further analysis, the Cisco PSIRT has reclassified this issue as a customer-configurable, resource management issue rather than a security vulnerability.
Metrics
Affected Vendors & Products
| Vendors | Products |
|---|---|
| Cisco |
|
No data.
No data.
References
History
Thu, 14 May 2026 17:00:00 +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. | Following the initial publication of the Security Advisory about a denial of service (DoS) condition in Cisco Crosswork Network Controller and Cisco Network Services Orchestrator (NSO), additional information has been made available to the Cisco Product Security Incident Response Team (PSIRT). Upon further analysis, the Cisco PSIRT has reclassified this issue as a customer-configurable, resource management issue rather than a security vulnerability. |
| Title | Cisco Crosswork Network Controller and Cisco Network Services Orchestrator Connection Exhaustion Denial of Service Vulnerability | Cisco Crosswork Network Controller and Cisco Network Services Orchestrator Advisory |
| Metrics |
cvssV3_1
|
cvssV3_1
|
Thu, 07 May 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Cisco
Cisco crosswork Network Automation Cisco network Services Orchestrator |
|
| Vendors & Products |
Cisco
Cisco crosswork Network Automation Cisco network Services Orchestrator |
Wed, 06 May 2026 18:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
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 | |
| References |
| |
| Metrics |
cvssV3_1
|
MITRE
Status: PUBLISHED
Assigner: cisco
Published: 2026-05-06T16:15:37.396Z
Updated: 2026-05-14T16:30:22.826Z
Reserved: 2025-10-08T11:59:15.394Z
Link: CVE-2026-20188
Vulnrichment
Updated: 2026-05-06T17:46:39.036Z
NVD
Status : Awaiting Analysis
Published: 2026-05-06T17:16:21.190
Modified: 2026-05-14T17:16:19.573
Link: CVE-2026-20188
Redhat
No data.