CVE-2026-48449: Adobe Campaign Classic RCE Vulnerability

CVE-2026-48449 Overview

CVE-2026-48449 is an Incorrect Authorization vulnerability [CWE-863] in Adobe Campaign Classic (ACC). The flaw permits arbitrary code execution in the context of the current user without any user interaction. The issue is network-exploitable, requires no privileges, and results in a scope change that extends impact beyond the vulnerable component. Adobe published details in security advisory APSB26-114.

Critical Impact
An unauthenticated remote attacker can execute arbitrary code against Adobe Campaign Classic instances, compromising confidentiality, integrity, and availability across a changed security scope.

Affected Products

Adobe Campaign Classic (ACC)
Refer to Adobe Security Advisory APSB26-114 for exact affected version ranges
On-premises and hosted ACC deployments

Discovery Timeline

2026-07-30 - CVE-2026-48449 published to NVD
2026-07-30 - Last updated in NVD database

Technical Details for CVE-2026-48449

Vulnerability Analysis

CVE-2026-48449 is classified as Incorrect Authorization under [CWE-863]. Adobe Campaign Classic performs authorization checks that fail to correctly enforce access restrictions on privileged operations. An attacker reaching the service over the network can invoke functionality that should be restricted, leading to arbitrary code execution in the context of the current user.

The advisory notes that scope is changed, meaning the exploit's impact extends beyond the vulnerable component's own security authority. This typically indicates that code execution reaches adjacent systems, service accounts, or data stores that ACC interacts with, such as backing databases, integration endpoints, or file systems used by campaign delivery workers.

Because no user interaction is required and no authentication is needed, the vulnerability is well-suited for opportunistic scanning and mass exploitation once weaponized. See the Adobe Security Advisory APSB26-114 for vendor-supplied technical detail.

Root Cause

The root cause is improper enforcement of authorization decisions within ACC. The application evaluates a request and grants access to a sensitive operation despite the requester lacking the required privilege. This class of defect commonly arises from missing checks on server-side endpoints, reliance on client-supplied identifiers, or overly permissive default access control lists.

Attack Vector

The attack vector is network-based. An attacker sends crafted requests to an exposed Adobe Campaign Classic instance and triggers a privileged code path without valid authorization. Successful exploitation yields code execution as the ACC service user, which typically holds broad access to marketing data, subscriber lists, and integration credentials.

No public proof-of-concept, ExploitDB entry, or CISA KEV listing is currently associated with CVE-2026-48449. Refer to the vendor advisory for exploitation prerequisites and technical indicators.

Detection Methods for CVE-2026-48449

Indicators of Compromise

Unexpected child processes spawned by the ACC application service account, particularly command shells, scripting interpreters, or curl/wget invocations
Outbound network connections from ACC servers to unfamiliar hosts, especially over non-standard ports
New or modified files in ACC deployment directories, including web-accessible paths
Anomalous authenticated sessions or API calls that succeed against endpoints normally requiring elevated roles

Detection Strategies

Baseline expected process trees and network destinations for ACC servers, then alert on deviations
Inspect ACC and web-server logs for requests to authorization-sensitive endpoints from unauthenticated or low-privilege sessions
Correlate ACC service-account activity with EDR telemetry to identify post-exploitation behavior such as credential access or lateral movement

Monitoring Recommendations

Forward ACC application, web server, and OS logs to a centralized analytics platform for retention and correlation
Monitor for privileged filesystem writes and scheduled task creation by the ACC service account
Track outbound egress from campaign delivery servers and alert on connections to newly observed domains or IPs

How to Mitigate CVE-2026-48449

Immediate Actions Required

Apply the Adobe patches referenced in APSB26-114 as soon as maintenance windows permit
Inventory all ACC deployments, including test and staging environments, and confirm exposure status
Restrict network reachability to ACC management interfaces from the public internet
Rotate credentials, API keys, and integration secrets accessible to the ACC service account if compromise is suspected

Patch Information

Adobe published security advisory APSB26-114 with fixed versions and installation guidance for Adobe Campaign Classic. Administrators should consult the advisory for the specific build numbers that address CVE-2026-48449 and follow Adobe's standard update procedure for on-premises and hosted deployments.

Workarounds

Place ACC behind a VPN or reverse proxy that enforces authentication before requests reach the application
Apply web application firewall rules to block unauthenticated requests to administrative and privileged API endpoints
Reduce the ACC service account's operating-system privileges to the minimum required for campaign delivery
Disable or firewall integration endpoints that are not actively used by production workflows

bash

# Example: restrict ACC management port to trusted admin subnet only
iptables -A INPUT -p tcp --dport 8080 -s 10.10.20.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 8080 -j DROP