How severe is CVE-2016-4852?

CVE-2016-4852 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2016-4852 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-4852?

CVE-2016-4852 affects Aki-null Yorufukurou. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-4852?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2016-4852 published?

CVE-2016-4852 was published on 2016-09-12 and last updated on 2026-06-17.

CVE-2016-4852

CVE-2016-4852 is a medium-severity vulnerability in Aki-null Yorufukurou with a CVSS 3.x base score of 6.5. 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-20.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Aki-null Yorufukurou
Published: 2016-09-12
Last modified: 2026-06-17

Description

YoruFukurou (NightOwl) before 2.85 relies on support for emoji skin-tone modifiers even though this support is missing from the CoreText CTFramesetter API on OS X 10.9, which allows remote attackers to cause a denial of service (application crash) via a crafted emoji character sequence.

Frequently asked questions

What is CVE-2016-4852?: YoruFukurou (NightOwl) before 2.85 relies on support for emoji skin-tone modifiers even though this support is missing from the CoreText CTFramesetter API on OS X 10.9, which allows remote attackers to cause a denial of service (application crash) via a crafted emoji character sequence.
How severe is CVE-2016-4852?: CVE-2016-4852 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2016-4852 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-4852?: CVE-2016-4852 affects Aki-null Yorufukurou. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-4852?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-4852 published?: CVE-2016-4852 was published on 2016-09-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:aki-null:yorufukurou:*:*:*:*:*:*:*:*

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