How severe is CVE-2021-33592?

CVE-2021-33592 has a CVSS 3.x base score of 9.8, 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-2021-33592 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33592?

CVE-2021-33592 affects Naver Toolbar. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-33592?

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-2021-33592 published?

CVE-2021-33592 was published on 2021-07-19 and last updated on 2026-06-17.

CVE-2021-33592

CVE-2021-33592 is a critical-severity vulnerability in Naver Toolbar with a CVSS 3.x base score of 9.8. 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-20.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Naver Toolbar
Published: 2021-07-19
Last modified: 2026-06-17

Description

NAVER Toolbar before 4.0.30.323 allows remote attackers to execute arbitrary code via a crafted upgrade.xml file. Special characters in filename parameter can be the cause of bypassing code signing check function.

Frequently asked questions

What is CVE-2021-33592?: NAVER Toolbar before 4.0.30.323 allows remote attackers to execute arbitrary code via a crafted upgrade.xml file. Special characters in filename parameter can be the cause of bypassing code signing check function.
How severe is CVE-2021-33592?: CVE-2021-33592 has a CVSS 3.x base score of 9.8, 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-2021-33592 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33592?: CVE-2021-33592 affects Naver Toolbar. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-33592?: 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-2021-33592 published?: CVE-2021-33592 was published on 2021-07-19 and last updated on 2026-06-17.

References

https://cve.naver.com/detail/cve-2021-33592

Affected products (1)

cpe:2.3:a:naver:toolbar:*:*:*:*:*:*:*:*

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