CVE-2021-33971: Qihoo 360 (https://www.360.cn/) Qihoo 360 Safeguard (https://www.360.cn/) Qihoo 360 Total Security (http://www

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HIGH 7.8DOWNGRADE

CVE-2021-33971 is a high-severity flaw (CVSS 7.8) affecting total security. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Qihoo 360 (https://www.360.cn/) Qihoo 360 Safeguard (https://www.360.cn/) Qihoo 360 Total Security (http://www.360totalsecurity.com/) is affected by: Buffer Overflow. The impact is: execute arbitrary code (local). The component is: This is a set of vulnerabilities affecting popular software, "360 Safeguard(12.1.0.1004,12.1.0.1005,13.1.0.1001)" , "360 Total Security(10.8.0.1060,10.8.0.1213)", "360 Safe Browser & 360 Chrome(13.0.2170.0)". The attac

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 64%)
CISA exploited list	No
Weakness	CWE-120
Published	2023-04-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: 360

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 22:15 UTCPublished CVE record published
2026-06-17 03:55 UTCUpdated Record last modified

360 total security DOWNGRADE

Affected: 10.8.0.1060

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.8.0.1060

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 10.8.0.1060 (Debian / Ubuntu)

apt-cache madison total-security sudo apt install total-security=<VERSION_BEFORE_10.8.0.1060> sudo apt-mark hold total-security

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

dnf --showduplicates list total-security sudo dnf downgrade total-security-<VERSION_BEFORE_10.8.0.1060> sudo dnf versionlock add 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-2021-33971?

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

Is CVE-2021-33971 being exploited?

CVE-2021-33971 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-2021-33971 affect?

CVE-2021-33971 affects total security. Severity is high (CVSS 7.8). Qihoo 360 (https://www.360.cn/) Qihoo 360 Safeguard (https://www.360.cn/) Qihoo 360 Total Security (http://www.360totalsecurity.com/) is affected by: Buffer Overflow. The impact is: execute arbitrary code (local). The component is: This is

How urgent is CVE-2021-33971?

Priority 41/100. High severity; Public exploit reference

Software pages

Google Chrome vulnerabilities

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References

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