Resource exhaustion in Cisco Crosswork Network Change Automation
CVE-2026-20188
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (Unrated). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (22.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 22.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Cisco Crosswork Network Change Automation — versions 3.0.0, 1.0.0, 2.0.2
- Cisco Network Services Orchestrator — versions 5.7, 5.7.1, 5.7.1.1
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-20188?
- CVE-2026-20188 is a unrated-severity vulnerability in Cisco Crosswork Network Change Automation, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-05-06.
- How severe is CVE-2026-20188?
- Unrated severity. CVSS v3 base score is 7.5 out of 10.