Security readout for executives and security teams
Plain-English summary
Affected Adobe ColdFusion servers may let an unauthenticated remote attacker read files outside permitted directories. Sensitive configuration, credentials, application data, or system information could be exposed. No user action is required, making internet-facing deployments the highest concern.
Executive priority
Treat this as a high-priority confidentiality risk. Rapidly identify exposed ColdFusion servers and apply Adobe's guidance. Escalate systems holding credentials, customer information, or regulated data because arbitrary file reads could disclose material secrets without authentication.
Technical view
CVE-2026-27305 is a CWE-22 path-traversal vulnerability affecting ColdFusion 2023.18, ColdFusion 2025.6, and earlier releases. It enables arbitrary filesystem reads over the network without authentication or user interaction. CVSS 3.1 rates it 8.6 because confidentiality impact is high, although integrity and availability impacts are not identified.
Likely exposure
Prioritize ColdFusion 2023.18, 2025.6, and earlier systems, especially internet-facing servers. Exposure depends on whether the vulnerable ColdFusion functionality is reachable. The supplied sources do not identify specific endpoints, configurations, or operating systems required for exploitation.
Exploitation context
The vulnerability has low stated attack complexity, requires no privileges, and needs no user interaction. The source bundle marks it absent from KEV and provides no evidence of active exploitation. That absence does not establish that exploitation is impossible or has not occurred elsewhere.
Researcher notes
The supplied record supports arbitrary filesystem read but not file modification, code execution, or service disruption. The CVSS scope is changed, but the bundle does not explain the security-boundary transition. Endpoint details, proof-of-concept availability, observed attacks, and exact corrected build numbers are not established here.
Mitigation direction
- Inventory ColdFusion versions and identify internet-facing instances.
- Review Adobe bulletin APSB26-38 for corrected releases and deployment guidance.
- Apply Adobe's corrective update using the vendor-supported process.
- Restrict unnecessary external access until remediation is verified.
- Protect configuration files and rotate exposed secrets if compromise is suspected.
Validation and detection
- Confirm each ColdFusion instance reports a release newer than the affected versions.
- Verify the installed update matches Adobe bulletin APSB26-38.
- Review access logs for unusual requests involving encoded or traversal-like paths.
- Check whether the ColdFusion service account can read unnecessary sensitive files.
- Perform authorized, non-destructive validation using approved defensive testing procedures.
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-22: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. 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 lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-27305 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
- High
- CVSS
- 8.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
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:N/A:N3.94adobeVulnerability scoring details
Base CVSS 3.1 score
8.6HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
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/coldfusion/apsb26-38.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.
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.