How severe is CVE-2024-23304?

CVE-2024-23304 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-23304 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-23304?

CVE-2024-23304 primarily affects Cybozu Kunai. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-23304?

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

Does CVE-2024-23304 have an EU (EUVD) identifier?

Yes. CVE-2024-23304 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-20823.

When was CVE-2024-23304 published?

CVE-2024-23304 was published on 2024-02-06 and last updated on 2026-06-17.

CVE-2024-23304

CVE-2024-23304 is a high-severity vulnerability in Cybozu Kunai with a CVSS 3.x base score of 7.5. 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-426.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-20823
Weakness: CWE-426
Affected product: Cybozu Kunai
Published: 2024-02-06
Last modified: 2026-06-17

Description

Cybozu KUNAI for Android 3.0.20 to 3.0.21 allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by performing certain operations.

Frequently asked questions

What is CVE-2024-23304?: Cybozu KUNAI for Android 3.0.20 to 3.0.21 allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by performing certain operations.
How severe is CVE-2024-23304?: CVE-2024-23304 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-23304 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-23304?: CVE-2024-23304 primarily affects Cybozu Kunai. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-23304?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-23304 have an EU (EUVD) identifier?: Yes. CVE-2024-23304 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-20823.
When was CVE-2024-23304 published?: CVE-2024-23304 was published on 2024-02-06 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:cybozu:kunai:3.0.20:*:*:*:*:android:*:*
cpe:2.3:a:cybozu:kunai:3.0.21:*:*:*:*:android:*:*

More vulnerabilities in Cybozu Kunai

CVE-2012-4011 — Critical (CVSS 9.3): The Cybozu KUNAI application before 2.0.6 for Android allows remote attackers to execute arbitrary Java methods, and…
CVE-2016-1187 — Medium (CVSS 6.8): Cybozu KUNAI for iPhone 2.0.3 through 3.1.5 and for Android 2.1.2 through 3.0.4 does not verify SSL certificates.
CVE-2017-2172 — Medium (CVSS 6.1): Cross-site scripting vulnerability in Cybozu KUNAI for Android 3.0.0 to 3.0.6 allows remote attackers to inject…
CVE-2012-4012 — Medium (CVSS 4.3): The WebView class in the Cybozu KUNAI application before 2.0.6 for Android allows remote attackers to execute arbitrary…
CVE-2017-2109 — Low (CVSS 2.5): Cybozu KUNAI for Android 3.0.4 to 3.0.5.1 allow remote attackers to obtain log information through a malicious Android…

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