Adobe InCopy Font Parsing Use-After-Free Information Disclosure Vulnerability
Priority LOW 25CWE-416Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
Adobe InCopy versions 18.0 (and earlier), 17.4 (and earlier) are affected by a Use After Free vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to bypass mitigations such as ASLR. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00354 29th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Adobe | InCopy | up to 18.0; up to 17.4; up to None | — | No fix listed | CNA |
- InCopy VendorAdobe Affected up to 18.0; up to 17.4; up to None Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:adobe:incopy:*:*:*:*:*:*:*:* | 17.0 – 17.4 | Vulnerable | Adobe |
| cpe:2.3:a:adobe:incopy:18.0:*:*:*:*:*:*:* | 18.0 | Vulnerable | Adobe |
| cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Apple |
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microsoft |
- cpe:2.3:a:adobe:incopy:*:*:*:*:*:*:*:* Versions 17.0 – 17.4 Vulnerable ·Adobe
- cpe:2.3:a:adobe:incopy:18.0:*:*:*:*:*:*:* Versions 18.0 Vulnerable ·Adobe
- cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Apple
- cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-21598
- 2026-10-03 Alias added: GHSA-55x4-ghv8-8v8m
References
More Adobe Incopy vulnerabilities
- TI-2021-04195 Adobe InCopy DOCX file parsing directory traversal vulnerability could lead to remote code execution CVSS 3.1HIGH 8.8
- TI-2022-12790 Adobe InCopy Font Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability CVSS 3.0HIGH 7.8
- TI-2022-12786 Adobe InCopy Font Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability CVSS 3.0HIGH 7.8
- TI-2022-12793 Adobe InCopy Font Parsing Use-After-Free Remote Code Execution Vulnerability CVSS 3.0HIGH 7.8
- TI-2022-12791 Adobe InCopy Font Parsing Use-After-Free Remote Code Execution Vulnerability CVSS 3.0HIGH 7.8
- TI-2022-12787 Adobe InCopy Font Parsing Out-Of-Bounds Read Remote Code Execution Vulnerability CVSS 3.0HIGH 7.8
Sources
- CVE-2023-21598 · CVE Program
- CVE-2023-21598 · NVD
- FIRST EPSS
- GHSA-55x4-ghv8-8v8m · GitHub Advisory Database · CC BY 4.0
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