Srimax Output Messenger Directory Traversal (CVE-2025-27920)

Historical catalog analysis: CISA added this entry on May 19, 2025. The entry reflects catalog information retrieved on August 31, 2026, not a snapshot archived on the inclusion date. Check current vendor guidance before acting.

What the vulnerability is

CVE-2025-27920 is a directory traversal vulnerability (CWE-22) identified in Srimax Output Messenger. This flaw allows an attacker to bypass intended directory restrictions to access files located elsewhere on the system. The primary risk associated with this exposure is the potential leakage of sensitive configuration files or arbitrary file access, which could provide an attacker with further insights into the system’s architecture or credentials.

Exposure and applicability

This vulnerability affects organizations deploying Srimax Output Messenger. The applicability depends on whether the software is exposed to untrusted networks or if internal actors have the ability to send crafted requests to the application. Because directory traversal often targets configuration files, assets serving as central communication hubs are at higher risk of sensitive data exposure.

Remediation priorities

Based on our analysis, vulnerability management teams should prioritize the following actions:

1. Asset Identification: Immediately identify all instances of Srimax Output Messenger within the environment to determine the scope of exposure.
2. Vendor Mitigation Application: Apply the specific mitigations provided by Srimax. If the product is deployed as a cloud service, organizations should align their response with BOD 22-01 guidance where applicable.
3. Decommissioning Evaluation: In scenarios where vendor mitigations are unavailable or cannot be verified, the organization should evaluate discontinuing use of the product to eliminate the risk.

How to validate remediation

Verification must go beyond a simple version check, as software versions do not always guarantee that a specific configuration is secure. To verify that exposure has been reduced, defenders should:

• Attempt Restricted Access: Use authorized testing to attempt to access known files outside the application’s intended directory. A successful mitigation is evidenced by the system denying these requests (e.g., returning 403 Forbidden or 404 Not Found).
• Configuration Audit: Review system logs for patterns indicative of traversal attempts (such as ../ sequences) to ensure that current mitigations are actively blocking such requests.

Limits and open questions

It remains unknown whether this vulnerability has been leveraged by ransomware campaigns. Furthermore, the source does not specify which exact versions of Output Messenger are affected or provide a specific patch version number. There is residual risk if the application is running with excessive system privileges (e.g., as root or administrator), as this would increase the range of files accessible via a directory traversal flaw even after some mitigations are applied.

Source and editorial note

CVE-2025-27920: Srimax Output Messenger Directory Traversal Vulnerability · Source date: May 19, 2025 · Retrieved August 31, 2026.

Material facts are tied to the cited primary source. Recommendations are independent defensive analysis unless attributed to the source. Confirm consequential decisions against current authoritative guidance.

Archive date: May 22, 2025. The displayed post date is assigned three days after the source date to organize this retrospective archive; it does not mean this site published the analysis then. First published by this site: October 14, 2026 at 00:27 UTC.

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