What is CVE-2021-33975?

CVE-2021-33975 is a critical-severity vulnerability in Browser.360 Safe Browser, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 10.0/10. Published 2023-04-19.

How severe is CVE-2021-33975?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Buffer overflow in Browser.360 Safe Browser

CVE-2021-33975

Buffer Overflow vulnerability in Qihoo 360 Total Security v10.8.0.1060 and v10.8.0.1213 allows attacker to escalate privileges.

Vulnerability class: Buffer Overflow

Published 2023-04-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.014 (70.9th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Browser.360 Safe Browser — versions 13.0.2170.0

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

MemoryCorruptor.blogspot.com/p/vulnerabilities-disclosures.html (Third Party Advisory)
www.youtube.com/channel/UCLJ6fZxUqbmPe4jiwC6o4hg/ (Exploit)
pastebin.com/ivNL7s0n (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-33975?: CVE-2021-33975 is a critical-severity vulnerability in Browser.360 Safe Browser, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 10.0/10. Published 2023-04-19.
How severe is CVE-2021-33975?: Critical severity. CVSS v3 base score is 10.0 out of 10.