EUVD-2026-56839
GHSA-26p9-67p6-4x27
Severity by source
AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Description states remote code execution with no user interaction and no stated authentication (PR:N), low complexity, and changed scope, warranting AV:N/AC:L/S:C with full C/I/A 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 lets a remote, unauthenticated attacker run code in the context of the current user via an incorrect-authorization flaw (CWE-863). The maximum CVSS 3.1 base score of 10.0 reflects a network-reachable, no-interaction bug with a changed scope, meaning impact can extend beyond the initially vulnerable component. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The primary prerequisite is network reachability to the ACC v7 application server (AV:N), running an affected build at or below 7.4.3 build 9399. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Every available signal points to high real-world risk: the CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H) describes network-reachable, low-complexity, unauthenticated exploitation with no user interaction and full CIA impact plus scope change, yielding the maximum 10.0. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Vendor-released patch: upgrade ACC v7 to 7.4.4 build 9400, which remediates this vulnerability per Adobe advisory APSB26-123 (https://helpx.adobe.com/security/products/campaign/apsb26-123.html). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Adobe Campaign Classic instances on versions v7 through 7.4.3 (build 9399) in production environments, immediately implement network firewall rules to restrict administrative access to authorized IP ranges only, and contact Adobe PSIRT directly for patch availability and timeline estimates. …
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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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