How severe is CVE-2026-26930?

CVE-2026-26930 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-26930 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-26930?

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-2026-26930 have an EU (EUVD) identifier?

Yes. CVE-2026-26930 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7682.

When was CVE-2026-26930 published?

CVE-2026-26930 was published on 2026-02-16 and last updated on 2026-06-17.

CVE-2026-26930

CVE-2026-26930 is a high-severity vulnerability with a CVSS 3.x base score of 7.2. 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-79.

Key facts

Severity: High (CVSS 3.x base score 7.2)
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7682
Weakness: CWE-79
Published: 2026-02-16
Last modified: 2026-06-17

Description

SmarterTools SmarterMail before 9526 allows XSS via MAPI requests.

Frequently asked questions

What is CVE-2026-26930?: SmarterTools SmarterMail before 9526 allows XSS via MAPI requests.
How severe is CVE-2026-26930?: CVE-2026-26930 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-26930 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-26930?: 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-2026-26930 have an EU (EUVD) identifier?: Yes. CVE-2026-26930 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7682.
When was CVE-2026-26930 published?: CVE-2026-26930 was published on 2026-02-16 and last updated on 2026-06-17.

References

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