EUVD-2026-56840
GHSA-jrx4-5gm3-vcqr
Severity by source
AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Unauthenticated network-reachable authorization bypass yielding code execution (AV:N/AC:L/PR:N/UI:N) with full CIA loss and a changed scope (S:C) per Adobe's described impact.
Primary rating from Vendor (adobe).
CVSS VectorVendor: adobe
Lifecycle Timeline
2DescriptionCVE.org
Adobe Campaign Classic (ACC) is affected by an Incorrect Authorization vulnerability that could result in arbitrary code execution in the context of the current user. An attacker could exploit this vulnerability to execute arbitrary code. Exploitation of this issue does not require user interaction. Scope is changed.
Articles & Coverage 1
AnalysisAI
Arbitrary code execution in Adobe Campaign Classic (ACC v7 through 7.4.3 build 9399) stems from an incorrect authorization flaw that lets a remote attacker bypass authentication and run code in the context of the current user. Adobe's PSIRT rates it CVSS 10.0 with a changed scope, meaning a successful attack can impact resources beyond the initially vulnerable component. There is no public exploit identified at time of analysis and it is not listed in CISA KEV, so exploitation is currently theoretical but the severity is maximal.
Technical ContextAI
Adobe Campaign Classic is an on-premise/hybrid enterprise marketing automation and cross-channel campaign management platform, typically deployed with internet-facing application and delivery servers. The root cause is CWE-863 (Incorrect Authorization): the application performs an authorization check but does so incorrectly, allowing an actor to reach functionality or data they should not be permitted to use. Combined with the tagged 'Authentication Bypass' behavior, the flawed authorization path can be leveraged to reach code-execution functionality without valid credentials, and the CVSS scope change (S:C) indicates the executing code can affect components outside the vulnerable module's security authority.
RemediationAI
Vendor-released patch: upgrade Adobe Campaign Classic v7 to 7.4.4 build 9400, which remediates the incorrect authorization flaw, per Adobe bulletin APSB26-123 (https://helpx.adobe.com/security/products/campaign/apsb26-123.html). Apply this update as the primary and definitive fix. Until the patch can be deployed, reduce exposure by restricting network access to the ACC application and delivery servers - place them behind a VPN or IP allowlist and remove any unnecessary internet exposure of administrative and API endpoints - accepting the trade-off that this may disrupt legitimate remote operator or integration access; also increase monitoring of authentication and authorization logs for anomalous access to privileged functionality. These are compensating controls only; because the flaw is an authorization bypass reachable over the network, network-level restriction limits the attacker population but does not eliminate risk from any actor who can already reach the server.
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Same weakness CWE-863 – Incorrect Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
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