How severe is CVE-2026-34352?

CVE-2026-34352 has a CVSS 3.x base score of 8.5, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability low.

Is CVE-2026-34352 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34352?

CVE-2026-34352 affects Tigervnc. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34352?

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-2026-34352 have an EU (EUVD) identifier?

Yes. CVE-2026-34352 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16468.

When was CVE-2026-34352 published?

CVE-2026-34352 was published on 2026-03-26 and last updated on 2026-06-17.

CVE-2026-34352

CVE-2026-34352 is a high-severity vulnerability in Tigervnc with a CVSS 3.x base score of 8.5. 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-732.

Key facts

Severity: High (CVSS 3.x base score 8.5)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-16468
Weakness: CWE-732
Affected product: Tigervnc
Published: 2026-03-26
Last modified: 2026-06-17

Description

In TigerVNC before 1.16.2, Image.cxx in x0vncserver allows other users to observe or manipulate the screen contents, or cause an application crash, because of incorrect permissions.

Frequently asked questions

What is CVE-2026-34352?: In TigerVNC before 1.16.2, Image.cxx in x0vncserver allows other users to observe or manipulate the screen contents, or cause an application crash, because of incorrect permissions.
How severe is CVE-2026-34352?: CVE-2026-34352 has a CVSS 3.x base score of 8.5, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability low.
Is CVE-2026-34352 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34352?: CVE-2026-34352 affects Tigervnc. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34352?: 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-2026-34352 have an EU (EUVD) identifier?: Yes. CVE-2026-34352 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16468.
When was CVE-2026-34352 published?: CVE-2026-34352 was published on 2026-03-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:tigervnc:tigervnc:*:*:*:*:*:*:*:*

More vulnerabilities in Tigervnc

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CVE-2017-7393 — High (CVSS 8.8): In TigerVNC 1.7.1 (VNCSConnectionST.cxx VNCSConnectionST::fence), an authenticated client can cause a double free,…
CVE-2020-26117 — High (CVSS 8.1): In rfb/CSecurityTLS.cxx and rfb/CSecurityTLS.java in TigerVNC before 1.11.0, viewers mishandle TLS certificate…
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