How severe is CVE-2021-43027?

CVE-2021-43027 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-43027 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43027?

CVE-2021-43027 affects Adobe After Effects. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-43027?

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.

When was CVE-2021-43027 published?

CVE-2021-43027 was published on 2023-09-07 and last updated on 2026-06-17.

CVE-2021-43027

CVE-2021-43027 is a high-severity vulnerability in Adobe After Effects with a CVSS 3.x base score of 7.8. 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-125.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Adobe After Effects
Published: 2023-09-07
Last modified: 2026-06-17

Description

Adobe After Effects versions 22.0 (and earlier) and 18.4.2 (and earlier) are affected by an out-of-bounds read vulnerability which could result in a read past the end of an allocated memory structure. An attacker could leverage this vulnerability to execute code in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Frequently asked questions

What is CVE-2021-43027?: Adobe After Effects versions 22.0 (and earlier) and 18.4.2 (and earlier) are affected by an out-of-bounds read vulnerability which could result in a read past the end of an allocated memory structure. An attacker could leverage this vulnerability to execute code in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
How severe is CVE-2021-43027?: CVE-2021-43027 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-43027 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43027?: CVE-2021-43027 affects Adobe After Effects. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-43027?: 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.
When was CVE-2021-43027 published?: CVE-2021-43027 was published on 2023-09-07 and last updated on 2026-06-17.

References

https://helpx.adobe.com/security/products/after_effects/apsb21-115.html

Affected products (1)

cpe:2.3:a:adobe:after_effects:*:*:*:*:*:*:*:*

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