What is CVE-2021-33973?

CVE-2021-33973 is a high-severity vulnerability in 360totalsecurity 360 Total Security, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.8/10. Published 2023-04-19.

How severe is CVE-2021-33973?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in 360totalsecurity 360 Total Security

CVE-2021-33973

Buffer Overflow vulnerability in Qihoo 360 Safe guard v12.1.0.1004, v12.1.0.1005, v13.1.0.1001 allows attacker to escalate priveleges.

Vulnerability class: Buffer Overflow

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

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (31.6th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 31.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

360totalsecurity 360 Total Security — versions 10.8.0.1213

Weakness classification (CWE)

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

References

MemoryCorruptor.blogspot.com/p/vulnerabilities-disclosures.html (Exploit, Third Party Advisory)
www.youtube.com/channel/UCLJ6fZxUqbmPe4jiwC6o4hg/ (Exploit)
pastebin.com/fsLDebg5 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-33973?: CVE-2021-33973 is a high-severity vulnerability in 360totalsecurity 360 Total Security, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.8/10. Published 2023-04-19.
How severe is CVE-2021-33973?: High severity. CVSS v3 base score is 7.8 out of 10.