InCopy | Integer Underflow (Wrap or Wraparound) (CWE-191)
Priority LOW 36CWE-191Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-191 and the CVSS impact.
Summary
InCopy versions 20.0, 19.5.1 and earlier are affected by an Integer Underflow (Wrap or Wraparound) 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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00338 27th 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
- Total
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 19.5.1 | — | No fix listed | CNA |
- InCopy VendorAdobe Affected up to 19.5.1 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:adobe:incopy:*:*:*:*:*:*:*:* | before 19.5.2 | Vulnerable | Adobe |
| cpe:2.3:a:adobe:incopy:20.0:*:*:*:*:*:*:* | 20.0 | 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 before 19.5.2 Vulnerable ·Adobe
- cpe:2.3:a:adobe:incopy:20.0:*:*:*:*:*:*:* Versions 20.0 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-2025-21156
- 2026-10-03 Alias added: GHSA-q2q4-vx5m-7xc9
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-2025-21156 · CVE Program
- CVE-2025-21156 · NVD
- FIRST EPSS
- GHSA-q2q4-vx5m-7xc9 · GitHub Advisory Database · CC BY 4.0
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