How severe is CVE-2025-66562?

CVE-2025-66562 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-66562 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66562?

CVE-2025-66562 affects Aiql Tuui. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66562?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-66562 have an EU (EUVD) identifier?

Yes. CVE-2025-66562 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201459.

When was CVE-2025-66562 published?

CVE-2025-66562 was published on 2025-12-05 and last updated on 2026-06-17.

CVE-2025-66562

CVE-2025-66562 is a critical-severity vulnerability in Aiql Tuui with a CVSS 3.x base score of 9.6. 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: Critical (CVSS 3.x base score 9.6)
CVSS v4: 8.9
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-201459
Weakness: CWE-79
Affected product: Aiql Tuui
Published: 2025-12-05
Last modified: 2026-06-17

Description

TUUI is a desktop MCP client designed as a tool unitary utility integration. Prior to 1.3.4, a critical Remote Code Execution (RCE) vulnerability exists in Tuui due to an unsafe Cross-Site Scripting (XSS) flaw in the Markdown rendering component. Tuui allows the execution of arbitrary JavaScript within ECharts code blocks. Combined with an exposed IPC interface that allows spawning processes, an attacker can execute arbitrary system commands on the victim's machine simply by having them view a malicious Markdown message. This vulnerability is fixed in 1.3.4.

Frequently asked questions

What is CVE-2025-66562?: TUUI is a desktop MCP client designed as a tool unitary utility integration. Prior to 1.3.4, a critical Remote Code Execution (RCE) vulnerability exists in Tuui due to an unsafe Cross-Site Scripting (XSS) flaw in the Markdown rendering component. Tuui allows the execution of arbitrary JavaScript within ECharts code blocks. Combined with an exposed IPC interface that allows spawning processes, an attacker can execute arbitrary system commands on the victim's machine simply by having them view a malicious Markdown message. This vulnerability is fixed in 1.3.4.
How severe is CVE-2025-66562?: CVE-2025-66562 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-66562 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66562?: CVE-2025-66562 affects Aiql Tuui. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66562?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-66562 have an EU (EUVD) identifier?: Yes. CVE-2025-66562 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201459.
When was CVE-2025-66562 published?: CVE-2025-66562 was published on 2025-12-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:aiql:tuui:*:*:*:*:*:*:*:*

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