How severe is CVE-2026-25776?

CVE-2026-25776 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-2026-25776 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-2026-25776?

CVE-2026-25776 primarily affects Sixapart Movable Type. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-25776?

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-2026-25776 have an EU (EUVD) identifier?

Yes. CVE-2026-25776 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20132.

When was CVE-2026-25776 published?

CVE-2026-25776 was published on 2026-04-08 and last updated on 2026-06-17.

CVE-2026-25776

CVE-2026-25776 is a critical-severity vulnerability in Sixapart Movable Type 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-94.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 9.3
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-20132
Weakness: CWE-94
Affected product: Sixapart Movable Type
Published: 2026-04-08
Last modified: 2026-06-17

Description

Movable Type provided by Six Apart Ltd. contains a code injection vulnerability which may allow an attacker to execute arbitrary Perl script.

Frequently asked questions

What is CVE-2026-25776?: Movable Type provided by Six Apart Ltd. contains a code injection vulnerability which may allow an attacker to execute arbitrary Perl script.
How severe is CVE-2026-25776?: CVE-2026-25776 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-2026-25776 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-2026-25776?: CVE-2026-25776 primarily affects Sixapart Movable Type. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-25776?: 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-2026-25776 have an EU (EUVD) identifier?: Yes. CVE-2026-25776 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20132.
When was CVE-2026-25776 published?: CVE-2026-25776 was published on 2026-04-08 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:a:sixapart:movable_type:*:*:*:*:premium_advanced:*:*:*
cpe:2.3:a:sixapart:movable_type:9.0.5:*:*:*:premium_advanced:*:*:*
cpe:2.3:a:sixapart:movable_type:9.0.6:*:*:*:premium_advanced:*:*:*
cpe:2.3:a:sixapart:movable_type:9.1.0:*:*:*:premium_advanced:*:*:*
cpe:2.3:a:sixapart:movable_type:*:*:*:*:advanced:*:*:*
cpe:2.3:a:sixapart:movable_type:9.1.0:*:*:*:advanced:*:*:*

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