How severe is CVE-2020-9753?

CVE-2020-9753 has a CVSS 3.x base score of 9.1, 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 none.

Is CVE-2020-9753 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-9753?

CVE-2020-9753 affects Naver Whale Browser Installer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-9753?

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-2020-9753 published?

CVE-2020-9753 was published on 2020-05-20 and last updated on 2026-06-17.

CVE-2020-9753

CVE-2020-9753 is a critical-severity vulnerability in Naver Whale Browser Installer with a CVSS 3.x base score of 9.1. 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-347.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 6.4
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-347
Affected product: Naver Whale Browser Installer
Published: 2020-05-20
Last modified: 2026-06-17

Description

Whale Browser Installer before 1.2.0.5 versions don't support signature verification for Flash installer.

Frequently asked questions

What is CVE-2020-9753?: Whale Browser Installer before 1.2.0.5 versions don't support signature verification for Flash installer.
How severe is CVE-2020-9753?: CVE-2020-9753 has a CVSS 3.x base score of 9.1, 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 none.
Is CVE-2020-9753 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-9753?: CVE-2020-9753 affects Naver Whale Browser Installer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-9753?: 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-2020-9753 published?: CVE-2020-9753 was published on 2020-05-20 and last updated on 2026-06-17.

References

https://cve.naver.com/detail/cve-2020-9753

Affected products (1)

cpe:2.3:a:naver:whale_browser_installer:*:*:*:*:*:*:*:*

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