High severity · published Feb 16, 2026
CVE-2026-26930
SmarterTools SmarterMail before 9526 allows XSS via MAPI requests
7.2
CVSS
0.3%
EPSS
No
On KEV
Description
SmarterTools SmarterMail before 9526 allows XSS via MAPI requests.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 26% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SM
SmarterMail · SmarterTools
before 9526 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-26930
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-26930
www.smartertools.com
https://www.smartertools.com/smartermail/release-notes#9526
www.smartertools.com
https://www.smartertools.com/smartermail/release-notes/current
seclists.org
http://seclists.org/fulldisclosure/2026/Feb/30
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