CVE-2025-61820 Overview
CVE-2025-61820 is a heap-based buffer overflow vulnerability in Adobe Illustrator affecting versions 28.7.10, 29.8.2, and earlier on Windows and macOS. An attacker who convinces a user to open a crafted file can trigger arbitrary code execution in the context of the current user. The flaw is tracked under [CWE-122] (Heap-based Buffer Overflow) and [CWE-787] (Out-of-Bounds Write). Adobe addressed the issue in security bulletin APSB25-109. Exploitation requires user interaction but no privileges or network access.
Critical Impact
Successful exploitation grants arbitrary code execution with the privileges of the logged-in user, enabling malware installation, credential theft, or persistence on the host.
Affected Products
- Adobe Illustrator 28.7.10 and earlier (version 2024 branch)
- Adobe Illustrator 29.8.2 and earlier (version 2025 branch)
- Affected platforms: Microsoft Windows and Apple macOS
Discovery Timeline
- 2025-11-11 - CVE-2025-61820 published to NVD
- 2025-11-12 - Last updated in NVD database
Technical Details for CVE-2025-61820
Vulnerability Analysis
The vulnerability resides in Adobe Illustrator's file parsing logic. When Illustrator processes a malformed input file, it writes data beyond the bounds of an allocated heap buffer. This out-of-bounds write corrupts adjacent heap metadata and object pointers. Attackers can shape the heap layout to overwrite function pointers or virtual table entries.
Once a corrupted pointer is dereferenced, control flow transfers to attacker-controlled memory. The result is arbitrary code execution in the security context of the user running Illustrator. Because Illustrator is a desktop graphics application, the user account often has broad access to documents, network shares, and credentials.
Root Cause
The root cause is insufficient bounds validation during parsing of structured file data. The application allocates a fixed-size heap buffer based on assumed input dimensions and then copies attacker-controlled bytes without verifying that the source length fits the destination. This pattern is characteristic of [CWE-122] and [CWE-787] defects in legacy parsers.
Attack Vector
Exploitation is local and requires user interaction. The attacker delivers a malicious Illustrator file via email attachment, instant message, web download, or shared storage. When the victim opens the file in a vulnerable Illustrator build, the parser triggers the heap overflow. No authentication or elevated privileges are required on the target host. See the Adobe Security Bulletin APSB25-109 for vendor details.
No public proof-of-concept exploit code is available at the time of writing. The vulnerability mechanism is described in prose because no verified exploit examples have been released.
Detection Methods for CVE-2025-61820
Indicators of Compromise
- Adobe Illustrator process (Illustrator.exe on Windows, Adobe Illustrator on macOS) spawning unexpected child processes such as cmd.exe, powershell.exe, bash, or osascript.
- Unexpected outbound network connections initiated by the Illustrator process after opening a file.
- Crash dumps or Windows Error Reporting events referencing heap corruption in Illustrator modules.
- Unusual .ai, .eps, .pdf, or .svg files received from untrusted sources or downloaded from unfamiliar domains.
Detection Strategies
- Monitor for parent-child process relationships where Illustrator launches shells, scripting hosts, or LOLBins.
- Alert on Illustrator writing executable files (.exe, .dll, .scr, .dylib) to user-writable directories.
- Inspect file metadata of inbound design files at the email gateway and flag malformed or oversized structural records.
- Correlate Illustrator crashes with subsequent persistence-related activity such as scheduled task creation or LaunchAgent modification.
Monitoring Recommendations
- Enable endpoint telemetry that captures process creation, image loads, and file writes from creative-suite applications.
- Track Illustrator version inventory across managed endpoints to confirm patch coverage.
- Forward endpoint and email gateway logs to a centralized analytics platform for cross-source correlation.
How to Mitigate CVE-2025-61820
Immediate Actions Required
- Update Adobe Illustrator to the fixed versions published in Adobe Security Bulletin APSB25-109.
- Inventory all endpoints running Illustrator 28.7.10, 29.8.2, or earlier and prioritize remediation.
- Instruct users to avoid opening Illustrator files received from untrusted email senders or external file-sharing links.
- Block inbound .ai and related design file attachments from external senders at the email gateway when not business-critical.
Patch Information
Adobe released patched builds of Illustrator addressing CVE-2025-61820 as part of bulletin APSB25-109. Administrators should deploy the updated versions through the Adobe Creative Cloud desktop application or enterprise update channels. Refer to the Adobe Security Bulletin APSB25-109 for exact fixed version numbers and download instructions.
Workarounds
- Restrict Illustrator usage to accounts without local administrator rights to limit post-exploitation impact.
- Apply application control policies that prevent Illustrator from launching shells or scripting interpreters as child processes.
- Use attack surface reduction rules or equivalent macOS controls to block child process creation from Office and creative applications.
# Configuration example: Windows Defender ASR rule to block Office/creative apps from spawning child processes
Set-MpPreference -AttackSurfaceReductionRules_Ids d4f940ab-401b-4efc-aadc-ad5f3c50688a -AttackSurfaceReductionRules_Actions Enabled
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
