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Arbitrary Code Execution in Adobe Campaign Classic Incorrect Authorization

IdentifiersCVE-2026-48303CWE-863· Incorrect Authorization

CVE-2026-48303 affects Adobe Campaign Classic (ACC) version 7.4.3 build 9394 and earlier. Adobe describes the issue as an Incorrect Authorization vulnerability (CWE-863) that can be exploited over the network and may result in arbitrary code execution in the context of the current user. No user interaction is required. The available source material does not identify the specific vulnerable component or function, but the CVSS v3.1 vector AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H indicates a remotely reachable, low-complexity flaw with changed scope and high impact across confidentiality, integrity, and availability.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can yield arbitrary code execution in the security context of the current user. Based on the published CVSS characteristics, this can lead to high-impact compromise of confidentiality, integrity, and availability, and the changed scope assessment indicates effects may extend beyond the originally vulnerable authorization boundary.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, reduce exposure of Adobe Campaign Classic to untrusted networks, restrict access to only necessary administrative or application interfaces, and enforce compensating access controls around reachable ACC services. Because the flaw is remotely exploitable without user interaction, prioritizing patch deployment is the primary mitigation. No specific vendor workaround was provided in the available content.

Remediation

Patch, then assume compromise.

Upgrade Adobe Campaign Classic to a version newer than 7.4.3 build 9394, as indicated by Adobe's advisory APSB26-66. Apply the vendor-provided security update/remediated build referenced in the Adobe security bulletin.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

ACTIVITY FEED

Recent activity

6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

6 SOURCESView more in app
What this page doesn’t show

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity5

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-48303
NVD
nvd.nist.gov/vuln/detail/CVE-2026-48303
MITRE CWE · CWE-863
Incorrect Authorization
helpx.adobe.com
helpx.adobe.com/security/products/campaign/apsb26-66.html