---
title: "CVE-2026-66887: CVE-2026-66887"
description: "The affected products are missing authorization on state-changing CGIs and session checks are not performed."
url: https://panop.io/threat-heartbeat/CVE-2026-66887/
---

# CVE-2026-66887 CVE-2026-66887

The affected products are missing authorization on state-changing CGIs and session checks are not performed.

CVSS base score 9.6 /10

Critical

CISA KEV

Not listed

Public exploit

None known

EPSS

0.33% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-66887)

## Details

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Published

15 September 2026

Updated

15 October 2026

Weakness

[CWE-862](https://cwe.mitre.org/data/definitions/862.html)

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-66887](https://nvd.nist.gov/vuln/detail/CVE-2026-66887)
- [https://digital-watchdog.com/downloads/](https://digital-watchdog.com/downloads/)
- [https://github.com/cisagov/CSAF/blob/develop/csaf\_files/OT/white/2026/icsa-26-258-01.json](https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-258-01.json)
- [https://www.cisa.gov/news-events/ics-advisories/icsa-26-258-01](https://www.cisa.gov/news-events/ics-advisories/icsa-26-258-01)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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