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PatchSiren cyber security CVE debrief

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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-27655 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-27655

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-27655 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-27655

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Mitigation or vendor reference

    Unverified legacy reference

    URL: https://www.manageengine.com/products/exchange-reports/advisory/CVE-2026-27655.html

    0fc0942c-577d-436f-ae8e-945763c79b02 - Vendor Advisory

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.