CVE-2026-64940 Nishishi Factory CVE debrief

Who should care

Users and administrators of Tegalog -Fumy Otegaru Memo Logger- should be aware of this vulnerability and take necessary actions to mitigate it. Affected operators, platforms, vulnerability-management, and security teams should review this vulnerability and plan for remediation. Compensating controls for exposed systems should be reviewed while remediation is scheduled and verified. Relevant monitoring, detection, and logs for exposed assets should be checked for extra review. Exceptions, retested remediated assets, and closed items should be tracked only after evidence is documented. Asset inventory and source tracking should be considered when reviewing this vulnerability. Rollback/change windows should be planned for remediation. Vendor patch guidance should be reviewed and applied if available. Exposure review should be performed to identify potential risks. Monitoring and compensating controls should be implemented to reduce the risk of this vulnerability. The management console access and operations should be restricted to only trusted users and networks. Logs should be monitored for any suspicious activity related to the management console. Security teams should review the vulnerability and implement necessary controls to prevent exploitation. Vulnerability management teams should prioritize remediation of this vulnerability based on its high CVSS score. IT teams should verify that the regular expression used in Tegalog -Fumy Otegaru Memo Logger- is not permissive and update it if necessary. Security teams should also review the CVE record and NVD detail for additional information on this vulnerability. The affected product deployments should be identified and owners should be assigned for follow-up. The official advisory or CVE record should be reviewed to validate affected scope, severity, and vendor guidance. Compensating controls for exposed systems should be reviewed while remediation is scheduled and verified. Relevant monitoring, detection, and logs for exposed assets should be checked for extra review. Exceptions, retested remediated assets, and closed items should be tracked only after evidence is documented. Asset inventory and source tracking .

Technical summary

The Tegalog -Fumy Otegaru Memo Logger- provided by Nishishi Factory contains a vulnerability due to a permissive regular expression. This may allow an attacker who can access the affected product to log in to the management console and perform any operations available from the management console. The vulnerability has a high CVSS score of 8.8 and could allow an attacker to log in to the management console and perform any available operations. The affected product context and defensive impact should be considered when reviewing this vulnerability.

Defensive priority

This vulnerability has a high CVSS score of 8.8 and could allow an attacker to log in to the management console and perform any available operations.

Recommended defensive actions

• Review and update the regular expression used in Tegalog -Fumy Otegaru Memo Logger- to ensure it is not permissive.
• Restrict access to the management console to only trusted users and networks.
• Monitor logs for any suspicious activity related to the management console.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE-2026-64940 vulnerability exists in Tegalog -Fumy Otegaru Memo Logger- provided by Nishishi Factory due to a permissive regular expression. This may allow an attacker who can access the affected product to log in to the management console and perform any operations available from the management console. Evidence is limited; further verification is required.

Official resources