CVE-2026-1331

Name: CVE-2026-1331
Creator: NVD / NIST
Published: 2026-01-22T09:15:52.197+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.3/10EPSS 0.69%

Last modified Jun 17, 2026

CVE-2026-1331 is a critical-severity vulnerability rated 9.3/10 on the CVSS scale. MeetingHub developed by HAMASTAR Technology has an Arbitrary File Upload vulnerability, allowing unauthenticated remote attackers to upload and execute web shell backdoors, thereby enabling arbitrary code execution on the server.. EPSS estimates a 0.69% chance of exploitation in the next 30 days.

Description

MeetingHub developed by HAMASTAR Technology has an Arbitrary File Upload vulnerability, allowing unauthenticated remote attackers to upload and execute web shell backdoors, thereby enabling arbitrary code execution on the server.

Metrics

CVSS 3.1

9.8/10

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

CVSS 4.0

9.3/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.69%

48.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-434

Affected Software

Vendor	Product	Versions
Hamastar	Meetinghub Paperless Meetings	< 2025-12-10

References

https://www.twcert.org.tw/en/cp-139-10651-ff09c-2.htmlThird Party Advisory
https://www.twcert.org.tw/tw/cp-132-10650-a5ee9-1.htmlThird Party Advisory

Timeline

Published: Jan 22, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-1331?

How severe is CVE-2026-1331?

CVE-2026-1331 has a CVSS score of 9.3/10 (CRITICAL severity). The EPSS model estimates a 0.69% probability of exploitation in the next 30 days.

How do I fix CVE-2026-1331?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-1331?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST