How severe is CVE-2026-2399?

CVE-2026-2399 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2026-2399 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-2399?

CVE-2026-2399 affects Schneider-electric Powerchute Serial Shutdown. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-2399?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-2399 have an EU (EUVD) identifier?

Yes. CVE-2026-2399 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-22282.

When was CVE-2026-2399 published?

CVE-2026-2399 was published on 2026-04-14 and last updated on 2026-06-17.

CVE-2026-2399

CVE-2026-2399 is a medium-severity vulnerability in Schneider-electric Powerchute Serial Shutdown with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v4: 6.9
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-22282
Weakness: CWE-22
Affected product: Schneider-electric Powerchute Serial Shutdown
Published: 2026-04-14
Last modified: 2026-06-17

Description

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability exists that could cause critical files overwritten with text data when a Web Admin user alters the POST /REST/upssleep request payload.

Frequently asked questions

What is CVE-2026-2399?: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability exists that could cause critical files overwritten with text data when a Web Admin user alters the POST /REST/upssleep request payload.
How severe is CVE-2026-2399?: CVE-2026-2399 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2026-2399 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-2399?: CVE-2026-2399 affects Schneider-electric Powerchute Serial Shutdown. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-2399?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-2399 have an EU (EUVD) identifier?: Yes. CVE-2026-2399 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-22282.
When was CVE-2026-2399 published?: CVE-2026-2399 was published on 2026-04-14 and last updated on 2026-06-17.

References

https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2026-104-01&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2026-104-01.pdf

Affected products (1)

cpe:2.3:a:schneider-electric:powerchute_serial_shutdown:*:*:*:*:*:*:*:*

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