CVE-2026-34352

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.25% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 16.1% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-03-26 22:30Z5 MO AGO

Last updated

2026-06-04 14:57Z3 MO AGO

Reserved

2026-03-26

Assigning CNA

mitre

Record state

PUBLISHED

Severity

High (CVSS 8.5)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L

Weaknesses

• CWE-732Incorrect Permission Assignment for Critical ResourceClass
• CWE-279Incorrect Execution-Assigned PermissionsVariant

Data version

5.2

Document digest

1d3e54cbd66226d95231e6ba1478f48d2d81876bdcd36ba89d9c065d6fccc50c

• www.openwall.comhttps://www.openwall.com/lists/oss-security/2026/03/26/7
• github.comhttps://github.com/TigerVNC/tigervnc/commit/0b5cab169d847789efa54459a87659d3fd484393
• sourceforge.nethttps://sourceforge.net/projects/tigervnc/files/stable/1.16.2
• groups.google.comhttps://groups.google.com/g/tigervnc-announce/c/anHL9WLshLI
• github.comhttps://github.com/TigerVNC/tigervnc/issues/2079