What is the CVSS score of CVE-2026-26930?

CVE-2026-26930 has a CVSS 3.1 base score of 7.2 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of SmarterTools SmarterMail are affected by CVE-2026-26930?

SmarterMail installations before version 9526 are vulnerable to cross-site scripting (XSS) attacks through MAPI requests, potentially allowing attackers to compromise user sessions and steal…

How to fix or mitigate CVE-2026-26930?

Within 24 hours: Inventory all SmarterMail deployments and document current versions; disable MAPI access if operationally feasible or restrict it to trusted networks only. Within 7 days: Deploy WAF rules to filter malicious MAPI payloads and monitor for exploitation attempts; contact SmarterTools for patch timeline and interim security guidance. Within 30 days: Plan upgrade to version 9526 or later; implement additional email security controls such as enhanced logging, anomaly detection, and user awareness training on phishing/session hijacking risks.

SmarterTools SmarterMail CVE-2026-26930

HIGH

Cross-site Scripting (XSS) (CWE-79)

2026-02-16 cve@mitre.org

XSS

7.2

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.2 HIGH

AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

CVE Published

Feb 16, 2026 - 17:18 nvd

HIGH 7.2

DescriptionCVE.org

SmarterTools SmarterMail before 9526 allows XSS via MAPI requests.

AnalysisAI

SmarterTools SmarterMail before 9526 allows XSS via MAPI requests. [CVSS 7.2 HIGH]

Technical ContextAI

Classified as CWE-79 (Cross-site Scripting (XSS)). Affects SmarterTools SmarterMail. SmarterTools SmarterMail before 9526 allows XSS via MAPI requests.

Affected ProductsAI

Product: SmarterTools SmarterMail. Versions: up to 9526.

RemediationAI

Monitor vendor advisories for a patch. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.