What is CVE-2022-35218?

CVE-2022-35218 is a medium-severity vulnerability in Microsoft Windows, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2022-08-02.

How severe is CVE-2022-35218?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in Microsoft Windows

CVE-2022-35218

The NHI card’s web service component has a heap-based buffer overflow vulnerability due to insufficient validation for packet origin parameter length. A LAN attacker with general user privilege can exploit this vulnerability to disrupt service.

Vulnerability class: Buffer Overflow

Published 2022-08-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.002 (7.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Microsoft Windows
Nhi Card’s Web Service Component — versions dae0509e5aabde2f110ce8418af67cf7
Nhi Health Insurance Web Service Component

Weakness classification (CWE)

References

www.twcert.org.tw/tw/cp-132-6354-1cf61-1.html (Third Party Advisory)

Frequently asked questions

What is CVE-2022-35218?: CVE-2022-35218 is a medium-severity vulnerability in Microsoft Windows, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2022-08-02.
How severe is CVE-2022-35218?: Medium severity. CVSS v3 base score is 5.5 out of 10.