How severe is CVE-2026-40543?

CVE-2026-40543 has a CVSS 4.0 base score of 8.8, rated high severity.

Is CVE-2026-40543 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-40543?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-40543 have an EU (EUVD) identifier?

Yes. CVE-2026-40543 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33609.

When was CVE-2026-40543 published?

CVE-2026-40543 was published on 2026-06-01 and last updated on 2026-06-17.

CVE-2026-40543

CVE-2026-40543 is a high-severity vulnerability with a CVSS 4.0 base score of 8.8. 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-862.

Key facts

Severity: High (CVSS 4.0 base score 8.8)
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-33609
Weakness: CWE-862
Published: 2026-06-01
Last modified: 2026-06-17

Description

SOPlanning does not enforce authorization for backup functionalities. An unauthenticated attacker can directly query backup-related endpoints and retrieve backup archives containing user databases with usernames and password hashes, as well as the config.csv file, which includes additional sensitive information. This issue affects SOPlanning version 1.55 and below.

Frequently asked questions

What is CVE-2026-40543?: SOPlanning does not enforce authorization for backup functionalities. An unauthenticated attacker can directly query backup-related endpoints and retrieve backup archives containing user databases with usernames and password hashes, as well as the config.csv file, which includes additional sensitive information. This issue affects SOPlanning version 1.55 and below.
How severe is CVE-2026-40543?: CVE-2026-40543 has a CVSS 4.0 base score of 8.8, rated high severity.
Is CVE-2026-40543 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-40543?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-40543 have an EU (EUVD) identifier?: Yes. CVE-2026-40543 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33609.
When was CVE-2026-40543 published?: CVE-2026-40543 was published on 2026-06-01 and last updated on 2026-06-17.

References

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