What is CVE-2025-8861?

CVE-2025-8861 is a critical-severity vulnerability in Changing Tsa, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2025-08-29.

How severe is CVE-2025-8861?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Changing Tsa

CVE-2025-8861

TSA developed by Changing has a Missing Authentication vulnerability, allowing unauthenticated remote attackers to read, modify, and delete database contents.

Vulnerability class: Broken Authentication

Published 2025-08-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (41.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Changing Tsa — versions 0

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

www.twcert.org.tw/tw/cp-132-10360-012e7-1.html (third-party-advisory)
www.twcert.org.tw/en/cp-139-10361-4ce04-2.html (third-party-advisory)

Frequently asked questions

What is CVE-2025-8861?: CVE-2025-8861 is a critical-severity vulnerability in Changing Tsa, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2025-08-29.
How severe is CVE-2025-8861?: Critical severity. CVSS v3 base score is 9.8 out of 10.