CVE-2026-11944: opensis Path Traversal — Exploit

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.

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CVSS v3.1 Score

6.5

MEDIUM

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

EPSS — Exploit Prediction

0.0038

Probability of exploitation

0.30%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-22 Path Traversal

Affected Products

Vendor	Product	Versions
os4ed	opensis	All
apple	macos	All
linux	linux_kernel	All
microsoft	windows	All

References

Exploits

https://fluidattacks.com/es/advisories/toto https://fluidattacks.com/es/advisories/toto

Other References

https://github.com/OS4ED/openSIS-Classic

Frequently Asked Questions

What is CVE-2026-11944? +

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. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-11944? +

CVE-2026-11944 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0038, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-11944? +

CVE-2026-11944 affects products from apple, linux, microsoft, os4ed, specifically: linux_kernel, macos, opensis, windows. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-11944? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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