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CVE-2026-27655 Zohocorp CVE debrief

CVE-2026-27655 is a Stored XSS vulnerability in the Permissions Based on Mailboxes report of Zohocorp ManageEngine Exchange Reporter Plus versions before 5802. This vulnerability allows for Stored XSS attacks, posing a High severity threat with a CVSS score of 7.3. Users of affected versions should apply patches immediately to prevent exploitation.

Vendor
Zohocorp
Product
ManageEngine Exchange Reporter Plus
CVSS
HIGH 7.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-03
Original CVE updated
2026-07-20
Advisory published
2026-04-03
Advisory updated
2026-07-20

Who should care

Users of Zohocorp ManageEngine Exchange Reporter Plus versions before 5802 should apply the patch to prevent exploitation of this Stored XSS vulnerability. Security teams and administrators responsible for managing these systems should prioritize patching to mitigate potential threats.

Technical summary

The vulnerability exists in the Permissions Based on Mailboxes report of Zohocorp ManageEngine Exchange Reporter Plus versions before 5802, allowing for Stored XSS attacks. The Common Vulnerability Scoring System (CVSS) score for this vulnerability is 7.3, indicating a High severity. The vulnerability is confirmed to exist in versions prior to 5802.

Defensive priority

High priority should be given to patching Zohocorp ManageEngine Exchange Reporter Plus versions before 5802 to prevent exploitation of this Stored XSS vulnerability. Immediate action is required to protect against potential attacks.

Recommended defensive actions

  • Apply the patch to update Zohocorp ManageEngine Exchange Reporter Plus to version 5802 or later.
  • Review and restrict access to the Permissions Based on Mailboxes report.
  • Monitor for suspicious activity in the Permissions Based on Mailboxes report.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record was published on 2026-04-03T13:17:07.903Z and was last modified on 2026-07-20T20:10:00.110Z. The NVD entry is currently Analyzed. The vulnerability exists in Zohocorp ManageEngine Exchange Reporter Plus versions before 5802. Evidence is based on CVE and NVD details. Defenders should verify affected product deployments and review official advisories.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-04-03T13:17:07.903Z and has not been modified since then. The NVD entry is currently Analyzed.