How severe is CVE-2023-21594?

CVE-2023-21594 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-2023-21594 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-21594?

CVE-2023-21594 primarily affects Adobe Incopy. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-21594?

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-2023-21594 published?

CVE-2023-21594 was published on 2023-01-13 and last updated on 2026-06-17.

CVE-2023-21594

CVE-2023-21594 is a high-severity vulnerability in Adobe Incopy 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-122.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-122
Affected product: Adobe Incopy
Published: 2023-01-13
Last modified: 2026-06-17

Description

Adobe InCopy versions 18.0 (and earlier), 17.4 (and earlier) are affected by a Heap-based Buffer Overflow vulnerability that could result in arbitrary code execution 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-2023-21594?: Adobe InCopy versions 18.0 (and earlier), 17.4 (and earlier) are affected by a Heap-based Buffer Overflow vulnerability that could result in arbitrary code execution 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-2023-21594?: CVE-2023-21594 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-2023-21594 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-21594?: CVE-2023-21594 primarily affects Adobe Incopy. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-21594?: 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-2023-21594 published?: CVE-2023-21594 was published on 2023-01-13 and last updated on 2026-06-17.

References

https://helpx.adobe.com/security/products/incopy/apsb23-08.html

Affected products (2)

cpe:2.3:a:adobe:incopy:*:*:*:*:*:*:*:*
cpe:2.3:a:adobe:incopy:18.0:*:*:*:*:*:*:*

More vulnerabilities in Adobe Incopy

CVE-2021-21090 — High (CVSS 8.8): Adobe InCopy version 16.0 (and earlier) is affected by an path traversal vulnerability when parsing a crafted file. An…
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CVE-2026-34707 — High (CVSS 7.8): InCopy versions 21.3, 20.5.3 and earlier are affected by a Heap-based Buffer Overflow vulnerability that could result…
CVE-2026-34706 — High (CVSS 7.8): InCopy versions 21.3, 20.5.3 and earlier are affected by an out-of-bounds write vulnerability that could result in…
CVE-2026-34631 — High (CVSS 7.8): InCopy versions 20.5.2, 21.2 and earlier are affected by an out-of-bounds write vulnerability that could result in…
CVE-2026-27287 — High (CVSS 7.8): InCopy versions 20.5.2, 21.2 and earlier are affected by an out-of-bounds read vulnerability when parsing a crafted…

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