Is CVE-2025-66834 actively exploited?

CVE-2025-66834 has no public evidence of in-the-wild exploitation as of 2026-01-07.

What is the CVSS score for CVE-2025-66834?

CVE-2025-66834 has a CVSS score of 7.3 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N.

How do I patch CVE-2025-66834?

Patch guidance is available from trueconf security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2025-66834.

Fix CVE-2025-66834 - HIGH trueconf server

Description

A CSV Formula Injection vulnerability in TrueConf Server v5.5.2.10813 allows a normal user to inject malicious spreadsheet formulas into exported chat logs via crafted Display Name.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Attack Vector: network
Complexity: low
Privileges: low
User Action: required
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: none
Weaknesses: CWE-1236

Metadata

Primary Vendor: TRUECONF
Published: 12/30/2025
Last Modified: 1/7/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2025-66834

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary