What’s Vulnerable › Vulnerabilities

CVE-2026-11944: openSIS Classic 9.3 - Authenticated path traversal in SentMail attachment download

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-07-14 · updated 2026-10-24
• Weakness: CWE-22

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.

Affected products

• OS4ED openSIS-Classic: 9.3

References

• https://fluidattacks.com/es/advisories/toto
• https://github.com/OS4ED/openSIS-Classic
• https://fluidattacks.com/es/advisories/toto

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