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PatchSiren cyber security CVE debrief

CVE-2026-22235 OPEXUS CVE debrief

CVE-2026-22235 is a vulnerability in OPEXUS eComplaint before version 9.0.45.0. An attacker can exploit this vulnerability by visiting the 'DocumentOpen.aspx' endpoint and iterating through predictable values of 'chargeNumber' to download any uploaded files. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity. The CVE was published on January 7, 2026, and has not been modified since then. The vulnerability is fixed in version 9.0.45.0.

Vendor
OPEXUS
Product
eCase Portal
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-01-07
Original CVE updated
2026-01-07
Advisory published
2026-01-07
Advisory updated
2026-01-07

Who should care

Organizations using OPEXUS eComplaint before version 9.0.45.0 should be aware of this vulnerability and take necessary steps to upgrade to the latest version. Additionally, security teams and administrators responsible for OPEXUS eComplaint should prioritize patching this vulnerability to prevent potential exploitation.

Technical summary

The vulnerability exists in the OPEXUS eComplaint application, specifically in the 'DocumentOpen.aspx' endpoint. An attacker can exploit this vulnerability by iterating through predictable values of 'chargeNumber' to download any uploaded files. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity. The CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Defensive priority

High priority should be given to patching this vulnerability, as it allows an attacker to download any uploaded files. Organizations should upgrade to version 9.0.45.0 or later to fix this vulnerability.

Recommended defensive actions

  • Upgrade OPEXUS eComplaint to version 9.0.45.0 or later
  • Review and update access controls for the 'DocumentOpen.aspx' endpoint
  • Monitor for suspicious activity related to the 'chargeNumber' parameter
  • Implement additional security measures to protect against IDOR vulnerabilities

Evidence notes

The vulnerability is documented in the CISA CSAF file and the CVE record on CVE.org. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-22235 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-22235

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

  • CVE-2026-22235 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-22235

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

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-008-02.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-26-008-02.json

    Reference

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.