Medium severity · published Jul 14, 2026
CVE-2026-11944
openSIS Classic 9.3 - Authenticated path traversal in SentMail attachment download
6.5
CVSS
0.5%
EPSS
No
On KEV
Description
openSIS Classic 9.3 contains an authenticated path traversal vulnerability in the legacy messaging sent-mail attachment download functionality that allows an authenticated attacker to read arbitrary files on the server via crafted path traversal sequences.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
openSIS-Classic · OS4ED
9.3 · source: vendor
OP
Opensis · Os4ed
9.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-11944
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-11944
Third Party Advisory
https://fluidattacks.com/es/advisories/toto
Product
https://github.com/OS4ED/openSIS-Classic
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