How severe is CVE-2026-21628?

CVE-2026-21628 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-21628 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-21628?

CVE-2026-21628 affects Templaza Astroid Framework. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-21628?

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

Does CVE-2026-21628 have an EU (EUVD) identifier?

Yes. CVE-2026-21628 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9816.

When was CVE-2026-21628 published?

CVE-2026-21628 was published on 2026-03-05 and last updated on 2026-06-17.

CVE-2026-21628

CVE-2026-21628 is a critical-severity vulnerability in Templaza Astroid Framework with a CVSS 3.x base score of 9.8. 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 10.0
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9816
Weakness: CWE-434
Affected product: Templaza Astroid Framework
Published: 2026-03-05
Last modified: 2026-06-17

Description

A improperly secured file management feature allows uploads of dangerous data types for unauthenticated users, leading to remote code execution.

Frequently asked questions

What is CVE-2026-21628?: A improperly secured file management feature allows uploads of dangerous data types for unauthenticated users, leading to remote code execution.
How severe is CVE-2026-21628?: CVE-2026-21628 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-21628 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-21628?: CVE-2026-21628 affects Templaza Astroid Framework. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-21628?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-21628 have an EU (EUVD) identifier?: Yes. CVE-2026-21628 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9816.
When was CVE-2026-21628 published?: CVE-2026-21628 was published on 2026-03-05 and last updated on 2026-06-17.

References

https://astroidframe.work

Affected products (1)

cpe:2.3:a:templaza:astroid_framework:*:*:*:*:*:joomla\!:*:*

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