CVE-2026-75863 Overview
Adobe Photoshop Desktop contains an integer overflow or wraparound vulnerability [CWE-190] that enables arbitrary code execution in the context of the current user. An attacker crafts a malicious file and delivers it to a victim through email, web download, or file-sharing channels. When the victim opens the file in Photoshop, the flawed arithmetic operation triggers memory corruption that leads to code execution. Exploitation requires user interaction and local access, which limits mass exploitation but supports targeted social engineering campaigns against designers, media teams, and creative professionals. Adobe published guidance in the Adobe Photoshop Security Bulletin APSB26-130.
Critical Impact
Successful exploitation grants attackers arbitrary code execution with the privileges of the user opening the malicious Photoshop file.
Affected Products
- Adobe Photoshop Desktop (see Adobe bulletin APSB26-130 for exact version ranges)
- Windows and macOS installations of Photoshop Desktop
- Enterprise Creative Cloud deployments distributing Photoshop Desktop
Discovery Timeline
- 2026-09-08 - CVE-2026-75863 published to the National Vulnerability Database (NVD)
- 2026-09-09 - Last updated in NVD database
Technical Details for CVE-2026-75863
Vulnerability Analysis
The vulnerability is an integer overflow or wraparound condition [CWE-190] in Photoshop Desktop file parsing logic. Photoshop performs arithmetic on values derived from untrusted file input, such as dimensions, offsets, or chunk sizes. When the calculation exceeds the maximum value of its integer type, the result wraps to a small or negative number. Subsequent memory allocation or bounds checks operate on the wrapped value, producing an undersized buffer or an incorrect index. Later write operations exceed the intended boundary and corrupt adjacent memory. Attackers shape the corrupted region to hijack control flow and execute code inside the Photoshop process.
Root Cause
The root cause is missing or insufficient validation of arithmetic results during file parsing. Photoshop trusts attacker-controlled fields inside image containers without checking for overflow before allocating or indexing memory. Adobe's advisory APSB26-130 confirms the classification and provides fixed versions.
Attack Vector
The attack vector is local and requires user interaction. An attacker crafts a malicious image file with parameters that trigger the overflow. The attacker delivers the file through phishing, malicious document repositories, or compromised design asset shares. When a user opens the file, Photoshop parses the malformed structure and executes attacker-controlled code with the user's privileges. No verified public proof-of-concept is available at the time of publication.
Stop Remote Code Execution Before It Runs
Singularity™ Endpoint detects and blocks exploit attempts at machine speed, including zero-days and novel attack techniques.
Stop Exploit AttemptsDetection Methods for CVE-2026-75863
Indicators of Compromise
- Photoshop process (Photoshop.exe on Windows, Adobe Photoshop on macOS) spawning command interpreters such as cmd.exe, powershell.exe, or /bin/sh.
- Unexpected child processes launched by Photoshop that perform network connections, file downloads, or persistence writes.
- Photoshop crash telemetry referencing access violations during image parsing shortly before suspicious process activity.
Detection Strategies
- Hunt for anomalous parent-child process relationships where Photoshop launches scripting engines, LOLBins, or unsigned binaries.
- Correlate file-open events for image files sourced from email attachments or browser downloads with subsequent process creation from Photoshop.
- Alert on Photoshop writing executable content to user-writable persistence locations such as %APPDATA%, ~/Library/LaunchAgents, or startup folders.
Monitoring Recommendations
- Ingest endpoint process, file, and network telemetry into a centralized analytics platform to link malicious file delivery with Photoshop execution behavior.
- Monitor Adobe Creative Cloud update channels and enforce version reporting to confirm every workstation runs a patched Photoshop build.
- Track email and web gateway logs for inbound .psd, .psb, .tiff, and related image formats from untrusted senders and correlate with endpoint open events.
How to Mitigate CVE-2026-75863
Immediate Actions Required
- Apply the Photoshop Desktop update referenced in Adobe Security Bulletin APSB26-130 across all managed workstations.
- Instruct users to open image files only from trusted sources and to treat unsolicited design assets as suspicious.
- Prioritize patch deployment for creative, marketing, and media teams that regularly process external image files.
Patch Information
Adobe released fixed versions of Photoshop Desktop in bulletin APSB26-130. Administrators should deploy the update through Adobe Creative Cloud Desktop or their enterprise software distribution tooling. Confirm the installed version matches or exceeds the fixed build listed in the advisory before closing remediation tickets.
Workarounds
- Restrict opening of image files from untrusted sources until the patched version is deployed enterprise-wide.
- Enforce least-privilege user accounts so exploitation cannot escalate beyond the standard user context.
- Block inbound image attachments from external senders at the email gateway for high-risk user groups pending patch rollout.
# Verify installed Photoshop version on macOS
mdls -name kMDItemVersion "/Applications/Adobe Photoshop 2026/Adobe Photoshop 2026.app"
# Verify installed Photoshop version on Windows (PowerShell)
Get-ItemProperty "HKLM:\Software\Adobe\Photoshop\*" | Select-Object PSChildName, ApplicationVersion
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
