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

This month

HIGH 7.8DOWNGRADE

CVE-2021-33973 is a high-severity flaw (CVSS 7.8) affecting 360 total security. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 66%)
CISA exploited list	No
Weakness	CWE-120
Published	2023-04-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: 360totalsecurity

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-04-19 21:15 UTCPublished CVE record published
2026-06-17 03:55 UTCUpdated Record last modified

360totalsecurity 360 total security DOWNGRADE

Affected: 10.8.0.1213

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.8.0.1213

1. Check installed version

apt-cache policy 360-total-security || rpm -q 360-total-security || 360-total-security --version

2. No fixed release: DOWNGRADE to a release before 10.8.0.1213 (Debian / Ubuntu)

apt-cache madison 360-total-security sudo apt install 360-total-security=<VERSION_BEFORE_10.8.0.1213> sudo apt-mark hold 360-total-security

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list 360-total-security sudo dnf downgrade 360-total-security-<VERSION_BEFORE_10.8.0.1213> sudo dnf versionlock add 360-total-security

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-33973?

360 total security: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-33973 being exploited?

CVE-2021-33973 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-33973 affect?

CVE-2021-33973 affects 360 total security. Severity is high (CVSS 7.8). 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.

How urgent is CVE-2021-33973?

Priority 41/100. High severity; Public exploit reference

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References

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