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Adobe Campaign Classic CVE-2026-48303

| EUVD-2026-35838 CRITICAL
Incorrect Authorization (CWE-863)
2026-06-09 psirt@adobe.com GHSA-gx58-v339-c87j
10.0
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
10.0 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Jun 09, 2026 - 21:35 vuln.today
CVE Published
Jun 09, 2026 - 21:17 nvd
CRITICAL 10.0

DescriptionNVD

Adobe Campaign Classic (ACC) versions 7.4.3 build 9394 and earlier are affected by an Incorrect Authorization vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue does not require user interaction. Scope is changed.

AnalysisAI

Remote code execution in Adobe Campaign Classic (ACC) version 7.4.3 build 9394 and earlier allows unauthenticated network attackers to execute arbitrary code in the context of the current user with no user interaction required. The flaw stems from an Incorrect Authorization weakness (CWE-863) and carries the maximum CVSS 3.1 base score of 10.0 with changed scope, indicating impact beyond the vulnerable component. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Identify exposed ACC 7.4.3 endpoint
Delivery
Send crafted request to authorization-gated handler
Exploit
Bypass CWE-863 authorization check
Execution
Trigger server-side code execution path
Persist
Execute arbitrary code as ACC user
Impact
Pivot to marketing data and adjacent systems

Vulnerability AssessmentAI

Exploitation No special conditions - remote unauthenticated exploitation against default configurations of Adobe Campaign Classic 7.4.3 build 9394 or earlier. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment All available signals point to maximum severity. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker on the internet identifies an exposed Adobe Campaign Classic 7.4.3 instance (commonly discoverable via the /nl/jsp/ or /r/ tracking endpoints), sends a single crafted request to a code-execution sink that is protected by the flawed authorization check, and bypasses the check to invoke server-side script execution. Because the scope is changed and the result is code execution in the current user context, the attacker pivots from the web tier to the campaign delivery infrastructure to exfiltrate marketing customer databases or stage further intrusion. …
Remediation Apply the Adobe-released patch documented in security bulletin APSB26-66 (https://helpx.adobe.com/security/products/campaign/apsb26-66.html), which addresses ACC 7.4.3 build 9394 and earlier - administrators should upgrade to the fixed build identified in that advisory (exact post-patch build number not enumerated in the input data and should be read from Adobe's bulletin). … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

24 hours: Identify and inventory all Adobe Campaign Classic deployments; confirm running build versions and assess network exposure (direct Internet access vs. …

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CVE-2026-48303 vulnerability details – vuln.today

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