How severe is CVE-2026-5999?

CVE-2026-5999 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-5999 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.

How do I fix CVE-2026-5999?

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

Does CVE-2026-5999 have an EU (EUVD) identifier?

Yes. CVE-2026-5999 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21280.

When was CVE-2026-5999 published?

CVE-2026-5999 was published on 2026-04-10 and last updated on 2026-06-17.

CVE-2026-5999

CVE-2026-5999 is a medium-severity vulnerability with a CVSS 3.x base score of 6.3. 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-266.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v2: 6.5
CVSS v4: 2.1
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-21280
Weakness: CWE-266
Published: 2026-04-10
Last modified: 2026-06-17

Description

A vulnerability has been found in JeecgBoot up to 3.9.1. This impacts an unknown function of the component SysAnnouncementController. Such manipulation leads to improper authorization. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The vendor confirmed the issue and will provide a fix in the upcoming release.

Frequently asked questions

What is CVE-2026-5999?: A vulnerability has been found in JeecgBoot up to 3.9.1. This impacts an unknown function of the component SysAnnouncementController. Such manipulation leads to improper authorization. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The vendor confirmed the issue and will provide a fix in the upcoming release.
How severe is CVE-2026-5999?: CVE-2026-5999 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-5999 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.
How do I fix CVE-2026-5999?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-5999 have an EU (EUVD) identifier?: Yes. CVE-2026-5999 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21280.
When was CVE-2026-5999 published?: CVE-2026-5999 was published on 2026-04-10 and last updated on 2026-06-17.

References

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