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Vulnerability record · CVE-2025-50399 · published 26 November 2025

CVE-2025-50399: Fastcom fac1200r firmware classic buffer overflow vulnerability

Fastcom · Fac1200r Firmware

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

9.8 CVSS 3.1 Critical EPSS 0.42% · top 66.0% CWE-120 · Classic buffer overflow
9.8CVSS 3.1 base score
0.42%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/sezangel/IOT-vul/tree/main/FAST/FAC1200R/1 ExploitThird Party Advisory
https://github.com/sezangel/IOT-vul/tree/main/FAST/FAC1200R/1 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2025-50399), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.