CVE-2023-27830

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total 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

1.08% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 62.7% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

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

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

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

2023-04-12 00:00Z3 YR AGO

Last updated

2025-02-08 02:40Z1 YR AGO

Reserved

2023-03-05

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Critical (CVSS 9.0)

CNA CVSS vector

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

Weaknesses

• CWE-269Improper Privilege ManagementClass

Data version

5.1

Document digest

6567e8b838f1bd7c7517e814375830fa4f1bcf21763d06e5977467ffdc261db1

• www.tightvnc.comhttps://www.tightvnc.com/whatsnew.php
• medium.comhttps://medium.com/nestedif/vulnerability-disclosure-privilege-escalation-tightvnc-8165208cce
• www.tightvnc.comhttps://www.tightvnc.com/news.php