Exploitation reportedThu, 29 Oct 2026
Adobe Commerce upload flaw exploited: patch stores and review account access
CISA added CVE-2026-48356 to its Known Exploited Vulnerabilities catalog on October 27, 2026. Check store deployments, managed environments and related modules.
Article
Adobe describes an upload of a dangerous file type that can lead to privilege escalation. Exploitation requires user interaction but no prior attacker login. Adobe’s bulletin rates the flaw 9.6 under CVSS v3.1. Adobe’s CNA record rates it 9.3 under CVSS v3.1 because it assesses the impact on availability differently.
APSB26-73 lists branch-specific July security packages for Adobe Commerce, Adobe Commerce B2B and Magento Open Source. Adobe Commerce Events versions 1.6.0 through 1.20.0 are affected and 1.21.0 is the listed fix. Use the advisory table to select the applicable package and check for later security updates.
- 01
Reach the upload path
An attacker can reach a vulnerable storefront or related component without prior login.
- 02
Obtain user interaction
Exploitation requires a user action.
- 03
Elevate privileges
Access to administrative functions, orders or customer data depends on the resulting permissions.
What to do: from the perimeter to internal systems
- 01
Inventory and patch stores
Include self-hosted, outsourced, containerized and standby instances and relevant extensions.
See what to doResources: 1
TWISA member solutions
Inventory and patch stores
Include self-hosted, outsourced, containerized and standby instances and relevant extensions.
- 02
Restrict administration
Limit access to the management interface, require MFA and review roles.
See what to doResources: 1
TWISA member solutions
Restrict administration
Limit access to the management interface, require MFA and review roles.
- 03
Preserve records and investigate
Check uploads, unexpected files, logins and configuration changes.
See what to doResources: 1
TWISA member solutions
Preserve records and investigate
Check uploads, unexpected files, logins and configuration changes.
- 04
Validate recovery and data access
Test clean backups and verify whether customer and order data were accessed.
See what to doResources: 1
TWISA member solutions
Validate recovery and data access
Test clean backups and verify whether customer and order data were accessed.
Storefront, administration and customer data
Allow authorized traffic and apply controls at each layer.
- 01
Inventory and patch stores
Storefront, administration and customer data
Validate the controlInclude self-hosted, outsourced, containerized and standby instances and relevant extensions.
- 02
Restrict administration
Storefront, administration and customer data
Validate the controlLimit access to the management interface, require MFA and review roles.
- 03
Preserve records and investigate
Storefront, administration and customer data
Validate the controlCheck uploads, unexpected files, logins and configuration changes.
Feed logs and traffic data from each layer into monitoring and response.
- Validate recovery and data accessTest clean backups and verify whether customer and order data were accessed.
Test and verify
Use authorized asset discovery, vulnerability scanning, penetration and API testing, and attack simulation. Retest after changes and verify monitoring against actual system behavior. For WAF-protected storefronts, verify request, alert, block and backend outcome separately.
TWISA member solutions
Inventory and patch stores
Include self-hosted, outsourced, containerized and standby instances and relevant extensions.
Restrict administration
Limit access to the management interface, require MFA and review roles.
Preserve records and investigate
Check uploads, unexpected files, logins and configuration changes.
Validate recovery and data access
Test clean backups and verify whether customer and order data were accessed.
Sources and further reading
- Adobe APSB26-73 and fixed releases
- NVD and Adobe CNA record
- Canadian Centre for Cyber Security exploitation update
- Read the full article in Traditional Chinese
Alert updated: 2026/10/29. Check the vendor’s latest guidance for product support and patch status.