What is CVE-2020-25843?

CVE-2020-25843 is a high-severity vulnerability in Changing Inc. Nhiservisignadapter, classified under Heap-based Buffer Overflow. CVSS score: 8.1/10. Published 2020-12-31.

How severe is CVE-2020-25843?

High severity. CVSS v3 base score is 8.1 out of 10.

Buffer overflow in Changing Inc. Nhiservisignadapter

CVE-2020-25843

NHIServiSignAdapter fails to verify the length of digital credential files’ path which leads to a heap overflow loophole. Remote attackers can use the leak to execute code without privilege.

Vulnerability class: Buffer Overflow

Published 2020-12-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.020 (79.7th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 79.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.019 · newest: 0.020 · change: +0.001

Affected products

Changing Inc. Nhiservisignadapter — versions 1.0.20.0218
Panorama Nhiservisignadapter — versions 1.0.20.0218

Weakness classification (CWE)

References

www.twcert.org.tw/tw/cp-132-4271-951cd-1.html (Third Party Advisory)

Frequently asked questions

What is CVE-2020-25843?: CVE-2020-25843 is a high-severity vulnerability in Changing Inc. Nhiservisignadapter, classified under Heap-based Buffer Overflow. CVSS score: 8.1/10. Published 2020-12-31.
How severe is CVE-2020-25843?: High severity. CVSS v3 base score is 8.1 out of 10.