CVE-2025-50399

Name: CVE-2025-50399
Creator: NVD / NIST
Published: 2025-11-26T16:15:47.947+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.37%

Last modified Jun 17, 2026

CVE-2025-50399 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. FAST FAC1200R F400_FAC1200R_Q is vulnerable to Buffer Overflow in the function sub_80435780 via the parameter password.. EPSS estimates a 0.37% chance of exploitation in the next 30 days.

Description

FAST FAC1200R F400_FAC1200R_Q is vulnerable to Buffer Overflow in the function sub_80435780 via the parameter password.

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

EPSS Probability

0.37%

28.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-120

Affected Software

Vendor	Product	Versions
Fastcom	Fac1200r Firmware	f400_fac1200r_q

References

https://github.com/sezangel/IOT-vul/tree/main/FAST/FAC1200R/1Exploit, Third Party Advisory
https://github.com/sezangel/IOT-vul/tree/main/FAST/FAC1200R/1Exploit, Third Party Advisory

Timeline

Published: Nov 26, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-50399?

FAST FAC1200R F400_FAC1200R_Q is vulnerable to Buffer Overflow in the function sub_80435780 via the parameter password.

How severe is CVE-2025-50399?

CVE-2025-50399 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.37% probability of exploitation in the next 30 days.

How do I fix CVE-2025-50399?

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-2025-50399?

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

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Source: NVD / NIST