How severe is CVE-2021-33970?

CVE-2021-33970 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-33970 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33970?

CVE-2021-33970 affects Browser.360 Chrome. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-33970?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-33970 published?

CVE-2021-33970 was published on 2023-04-19 and last updated on 2026-06-17.

CVE-2021-33970

CVE-2021-33970 is a critical-severity vulnerability in Browser.360 Chrome with a CVSS 3.x base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-843.

Key facts

Severity: Critical (CVSS 3.x base score 10.0)
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-843
Affected product: Browser.360 Chrome
Published: 2023-04-19
Last modified: 2026-06-17

Description

Buffer Overflow vulnerability in Qihoo 360 Chrome v13.0.2170.0 allows attacker to escalate priveleges.

Frequently asked questions

What is CVE-2021-33970?: Buffer Overflow vulnerability in Qihoo 360 Chrome v13.0.2170.0 allows attacker to escalate priveleges.
How severe is CVE-2021-33970?: CVE-2021-33970 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-33970 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33970?: CVE-2021-33970 affects Browser.360 Chrome. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-33970?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-33970 published?: CVE-2021-33970 was published on 2023-04-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:browser.360:chrome:13.0.2170.0:*:*:*:*:*:*:*

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