CVE-2025-21163 Overview
CVE-2025-21163 is a stack-based buffer overflow vulnerability in Adobe Illustrator that enables arbitrary code execution in the context of the current user. The flaw affects Illustrator versions 29.1, 28.7.3, and earlier across both Windows and macOS platforms. Exploitation requires user interaction, where a victim must open a crafted malicious file. Adobe addressed the issue in security bulletin APSB25-11. The vulnerability maps to [CWE-121] Stack-based Buffer Overflow and [CWE-787] Out-of-bounds Write.
Critical Impact
Successful exploitation allows attackers to execute arbitrary code with the privileges of the current user, potentially leading to full compromise of the host system.
Affected Products
- Adobe Illustrator 29.1 and earlier
- Adobe Illustrator 28.7.3 and earlier
- Microsoft Windows and Apple macOS installations of the above versions
Discovery Timeline
- 2025-02-11 - CVE-2025-21163 published to NVD
- 2025-02-11 - Adobe releases security bulletin APSB25-11 with patched versions
- 2025-03-03 - Last updated in NVD database
Technical Details for CVE-2025-21163
Vulnerability Analysis
The vulnerability is a stack-based buffer overflow within Adobe Illustrator's file parsing logic. When Illustrator processes a malformed input file, the application writes data beyond the bounds of a fixed-size stack buffer. This out-of-bounds write corrupts adjacent stack memory, including saved return addresses and structured exception handler records on Windows builds. Attackers leverage this corruption to redirect execution flow into attacker-controlled data.
Because Illustrator runs with the privileges of the logged-in user, successful exploitation grants the attacker the same level of access. On workstations used by designers and creative professionals, this often includes access to proprietary assets, source files, and authenticated cloud sessions.
Root Cause
The root cause is missing or incorrect bounds checking when copying file-derived data into a stack-allocated buffer. Illustrator trusts size or offset fields embedded in the input file without validating them against the destination buffer size, producing the conditions described by [CWE-121] and [CWE-787].
Attack Vector
The attack vector is local and requires user interaction. An attacker crafts a malicious Illustrator-compatible file and delivers it through phishing email, a download link, or a shared design asset. When the victim opens the file in a vulnerable Illustrator version, the parser triggers the overflow. No elevated privileges are required prior to exploitation, and no network exposure of the application is needed.
No public proof-of-concept exploit is available at the time of writing, and the issue is not listed in the CISA Known Exploited Vulnerabilities catalog.
Detection Methods for CVE-2025-21163
Indicators of Compromise
- Unexpected crashes of Illustrator.exe (Windows) or the Adobe Illustrator process (macOS) shortly after opening a file from an untrusted source.
- Creation of child processes by Illustrator such as cmd.exe, powershell.exe, wscript.exe, or shell processes on macOS.
- Outbound network connections initiated by the Illustrator process to unfamiliar domains or IP addresses.
- Suspicious files written to user profile directories immediately after Illustrator opens a document.
Detection Strategies
- Monitor process lineage where Illustrator spawns interpreters, scripting hosts, or LOLBins not normally associated with design workflows.
- Apply behavioral identification rules for memory corruption patterns, including unexpected ROP-style execution from non-executable memory regions.
- Correlate Illustrator crash events with subsequent file write, registry, or persistence activity on the same host.
Monitoring Recommendations
- Collect endpoint telemetry on Illustrator process executions, command lines, and module loads.
- Alert on Illustrator opening files from email attachments, browser download folders, or removable media.
- Track Illustrator version inventory across managed endpoints to identify hosts still running pre-patch builds.
How to Mitigate CVE-2025-21163
Immediate Actions Required
- Update Adobe Illustrator to the fixed versions listed in Adobe Security Bulletin APSB25-11 on all Windows and macOS endpoints.
- Block delivery of Illustrator file formats from untrusted external senders at the email gateway until patching is complete.
- Instruct users to avoid opening Illustrator files received from unknown or unverified sources.
Patch Information
Adobe published fixed builds in security bulletin APSB25-11 on February 11, 2025. Administrators should deploy the updated Illustrator versions identified in the Adobe Security Bulletin APSB25-11 through the Creative Cloud desktop application or enterprise deployment tooling such as the Adobe Admin Console.
Workarounds
- Restrict Illustrator usage to non-administrative user accounts to limit post-exploitation impact.
- Enforce application control policies that prevent Illustrator from spawning command interpreters or scripting hosts.
- Use email and web content filtering to quarantine .ai, .eps, and related design files from untrusted senders pending patch deployment.
# Verify installed Illustrator version on macOS
defaults read "/Applications/Adobe Illustrator 2025/Adobe Illustrator.app/Contents/Info.plist" CFBundleShortVersionString
# Verify installed Illustrator version on Windows (PowerShell)
Get-ItemProperty "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\*" |
Where-Object { $_.DisplayName -like "*Illustrator*" } |
Select-Object DisplayName, DisplayVersion
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
