Security readout for executives and security teams
Plain-English summary
Adobe Campaign Classic contains a critical authorization flaw that may let a remote, unauthenticated attacker run code with the application user’s privileges. No user action is required. Successful exploitation could expose data, alter systems, or disrupt service, with effects crossing a security boundary.
Executive priority
Treat this as an immediate remediation priority for affected, network-reachable systems. The maximum CVSS score, unauthenticated attack path, absent user interaction, and potential full confidentiality, integrity, and availability impact create substantial business risk even without confirmed active exploitation.
Technical view
CVE-2026-27302 is a CWE-863 incorrect-authorization vulnerability in Adobe Campaign Classic. Its CVSS 3.1 score is 10.0: network-accessible, low complexity, no privileges, no user interaction, changed scope, and high confidentiality, integrity, and availability impact. The supplied affected-version data names ACC v7 7.4.4 build 9400 and also contains an ambiguous “0” entry.
Likely exposure
Exposure applies to Adobe Campaign Classic deployments matching the supplied affected-version data. Network-reachable instances present the clearest risk. The bundle does not establish whether every older build, hosted configuration, or deployment model is affected, so asset-specific confirmation with Adobe guidance is necessary.
Exploitation context
The vulnerability is remotely exploitable without authentication or user interaction, according to the CVSS vector. Arbitrary code executes in the current user’s context and changes scope. The supplied sources do not report active exploitation, and the CVE is not identified as present in KEV.
Researcher notes
The record describes authorization failure leading to arbitrary code execution, but supplies no vulnerable component, request path, root cause, indicators, exploit evidence, or fixed version. The “0” affected-version entry is unclear. Researchers should use Adobe APSB26-123 to resolve version scope and remediation details without assuming unsupported affected releases.
Mitigation direction
- Review Adobe advisory APSB26-123 for supported remediation and affected-build details.
- Prioritize remediation for network-reachable ACC v7 7.4.4 build 9400 systems.
- Temporarily restrict ACC access to trusted networks and required administrators.
- Monitor ACC hosts for unexpected processes, file changes, and outbound connections.
- Preserve relevant application, authentication, proxy, and endpoint logs for investigation.
Validation and detection
- Inventory Adobe Campaign Classic instances and record exact versions and build numbers.
- Confirm whether any instance runs ACC v7 7.4.4 build 9400.
- Map network paths that can reach each affected ACC service.
- Verify Adobe-recommended remediation is applied using version and build evidence.
- Review available telemetry for unexplained code execution or privilege-boundary effects.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-863: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-27302 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 10 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H3.96adobeVulnerability scoring details
Base CVSS 3.1 score
10CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://helpx.adobe.com/security/products/campaign/apsb26-123.htmlCVE reference, adobe · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Incorrect Authorization
Incorrect Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.