How severe is CVE-2026-21730?

CVE-2026-21730 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-21730 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-21730?

CVE-2026-21730 affects Verint Verba Collaboration Compliance And Quality Management Platform. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-21730?

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

Does CVE-2026-21730 have an EU (EUVD) identifier?

Yes. CVE-2026-21730 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30284.

When was CVE-2026-21730 published?

CVE-2026-21730 was published on 2026-05-14 and last updated on 2026-06-17.

CVE-2026-21730

CVE-2026-21730 is a medium-severity vulnerability in Verint Verba Collaboration Compliance And Quality Management Platform with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v4: 5.3
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30284
Weakness: CWE-79
Affected product: Verint Verba Collaboration Compliance And Quality Management Platform
Published: 2026-05-14
Last modified: 2026-06-17

Description

Verba is affected by a Stored Cross-Site Scripting (XSS) vulnerability within its login logging mechanism. When an unauthenticated remote attacker attempts to log in using an incorrect username and password combination, the supplied username value is recorded in the application logs. Due to lack of input sanitization, an attacker can inject a malicious XSS payload into the username field. This payload will be executed in the context of the administrator’s browser when the admin accesses the web application's log viewer. The vendor was notified early about this vulnerability, but didn't respond to our messages. This issue was fixed in version 10.0.6

Frequently asked questions

What is CVE-2026-21730?: Verba is affected by a Stored Cross-Site Scripting (XSS) vulnerability within its login logging mechanism. When an unauthenticated remote attacker attempts to log in using an incorrect username and password combination, the supplied username value is recorded in the application logs. Due to lack of input sanitization, an attacker can inject a malicious XSS payload into the username field. This payload will be executed in the context of the administrator’s browser when the admin accesses the web application's log viewer. The vendor was notified early about this vulnerability, but didn't respond to our messages. This issue was fixed in version 10.0.6
How severe is CVE-2026-21730?: CVE-2026-21730 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-21730 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-21730?: CVE-2026-21730 affects Verint Verba Collaboration Compliance And Quality Management Platform. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-21730?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-21730 have an EU (EUVD) identifier?: Yes. CVE-2026-21730 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30284.
When was CVE-2026-21730 published?: CVE-2026-21730 was published on 2026-05-14 and last updated on 2026-06-17.

References

https://cert.pl/en/posts/2026/05/CVE-2026-21730

Affected products (1)

cpe:2.3:a:verint:verba_collaboration_compliance_and_quality_management_platform:*:*:*:*:*:*:*:*

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