How severe is CVE-2019-15690?

CVE-2019-15690 has a CVSS 3.x base score of 8.8, rated high 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-2019-15690 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2019-15690?

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

Does CVE-2019-15690 have an EU (EUVD) identifier?

Yes. CVE-2019-15690 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-6629.

When was CVE-2019-15690 published?

CVE-2019-15690 was published on 2025-01-24 and last updated on 2026-06-17.

CVE-2019-15690

CVE-2019-15690 is a high-severity vulnerability with a CVSS 3.x base score of 8.8. 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-122.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2019-6629
Weakness: CWE-122
Published: 2025-01-24
Last modified: 2026-06-17

Description

LibVNCServer 0.9.12 release and earlier contains heap buffer overflow vulnerability within the HandleCursorShape() function in libvncclient/cursor.c. An attacker sends cursor shapes with specially crafted dimensions, which can result in remote code execution.

Frequently asked questions

What is CVE-2019-15690?: LibVNCServer 0.9.12 release and earlier contains heap buffer overflow vulnerability within the HandleCursorShape() function in libvncclient/cursor.c. An attacker sends cursor shapes with specially crafted dimensions, which can result in remote code execution.
How severe is CVE-2019-15690?: CVE-2019-15690 has a CVSS 3.x base score of 8.8, rated high 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-2019-15690 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2019-15690?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2019-15690 have an EU (EUVD) identifier?: Yes. CVE-2019-15690 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-6629.
When was CVE-2019-15690 published?: CVE-2019-15690 was published on 2025-01-24 and last updated on 2026-06-17.

References

https://ics-cert.kaspersky.com/vulnerabilities/klcert-20-009-remote-code-execution-on-libvnc-version-prior-to-0-9-12/

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