Vulnerability · CVE-2026-6866
CWE-1188 Initialization of a Resource with an Insecure Default vulnerability exists that could cause unauthorized disclosure of sensitive information when credentials…
Published May 12, 2026 · catalog updated Jun 24, 2026 · ecostruxure panel server pas400 firmware
Last checked Oct 28, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2026-6866. EPSS is 0.29%. Act only if a listed version of ecostruxure panel server pas400 firmware is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- High8.2
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.29%
- Remediation
- Version ranges on file
- Affected products
- cpe schneider-electric/ecostruxure panel server pas400 firmware · cpe schneider-electric/ecostruxure panel server pas600 firmware · cpe schneider-electric/ecostruxure panel server pas600v2 firmware · cpe schneider-electric/ecostruxure panel server pas800 firmware · cpe schneider-electric/ecostruxure panel server pas800v2 firmware
CWE-1188 Initialization of a Resource with an Insecure Default vulnerability exists that could cause unauthorized disclosure of sensitive information when credentials revert to initial settings in rare circumstances, enabling unauthorized authentication using known credentials.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- cpe schneider-electric/ecostruxure panel server pas400 firmware< 002.006.000
- cpe schneider-electric/ecostruxure panel server pas600 firmware< 002.006.000
- cpe schneider-electric/ecostruxure panel server pas600v2 firmware< 002.006.000
- cpe schneider-electric/ecostruxure panel server pas800 firmware< 002.006.000
- cpe schneider-electric/ecostruxure panel server pas800v2 firmware< 002.006.000
How to fix CVE-2026-6866
Upgrade
CVE-2026-6866 lists a fix boundary at 002.006.000. Compare the installed build with that boundary before you change production.
Version check
Affected < 002.006.000
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-6866. EPSS is 0.29%. Act only if a listed version of ecostruxure panel server pas400 firmware is installed.
Which versions are affected?
Compare what you have installed with schneider-electric/ecostruxure panel server pas400 firmware < 002.006.000; schneider-electric/ecostruxure panel server pas600 firmware < 002.006.000; schneider-electric/ecostruxure panel server pas600v2 firmware < 002.006.000; schneider-electric/ecostruxure panel server pas800 firmware < 002.006.000. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-1188. EPSS 0.29%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
May 12, 2026 · NIST NVD
Detected
CWE-1188 Initialization of a Resource with an Insecure Default vulnerability exists that could cause unauthorized disclosure of sensitive information when credentials revert to initial settings in rare circumstances, enabling unauthorized authentication using known credentials.
Jun 24, 2026 · NIST NVD
Updated
CWE-1188 Initialization of a Resource with an Insecure Default vulnerability exists that could cause unauthorized disclosure of sensitive information when credentials revert to initial settings in rare circumstances, enabling unauthorized authentication using known credentials.
Sources
- CVE.orgVulnerability recordCVE-2026-6866
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-6866
30-day exploitation probability 0.29%
first.org - NIST NVDVulnerability recordCVE-2026-6866
CWE-1188 Initialization of a Resource with an Insecure Default vulnerability exists that could cause unauthorized disclosure of sensitive information when credentials revert to initial settings in rare circumstances, enabling unauthorized authentication using known credentials.
nvd.nist.gov
References
Freshness
Last verified in this catalog Oct 28, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSOct 28, 2026
- NIST NVDOct 22, 2026
- CVE.orgOct 16, 2026