How severe is CVE-2026-20188?

CVE-2026-20188 has a CVSS 3.x base score of 0.0, rated none severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability none.

Is CVE-2026-20188 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-20188?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-20188 have an EU (EUVD) identifier?

Yes. CVE-2026-20188 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-27860.

When was CVE-2026-20188 published?

CVE-2026-20188 was published on 2026-05-06 and last updated on 2026-06-17.

CVE-2026-20188

CVE-2026-20188 is a none-severity vulnerability with a CVSS 3.x base score of 0.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: None (CVSS 3.x base score 0.0)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-27860
Weakness: CWE-400
Published: 2026-05-06
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-20188?: CVE-2026-20188 has a CVSS 3.x base score of 0.0, rated none severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability none.
Is CVE-2026-20188 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-20188?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-20188 have an EU (EUVD) identifier?: Yes. CVE-2026-20188 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-27860.
When was CVE-2026-20188 published?: CVE-2026-20188 was published on 2026-05-06 and last updated on 2026-06-17.

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nso-dos-7Egqyc

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