CVE-2025-66834

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.

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CVSS v3.1

7.3 HIGH

EPSS

0.30%

probability of exploitation in 30 days

CISA KEV

Not listed

no confirmed exploitation reported

News coverage

sources referencing this CVE

EPSS Trend

Aug 16, 2026 → Aug 28, 2026

▲ 0.04pp

0.27% → 0.30% over 3 tracked changes

CVSS v3.1 Detail

Attack VectorNETWORK

Attack ComplexityLOW

Privileges RequiredLOW

User InteractionREQUIRED

ScopeUNCHANGED

ConfidentialityHIGH

IntegrityHIGH

AvailabilityNONE

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

Connections

3 relationships

CWE-1236

source

Timeline

disclosure → media coverage

Dec 30, 2025

Disclosure — published as a CVE record. · last revised by NVD Aug 20, 2026