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CVE-2025-50399

34
FAUCET Score

CVE-2025-50399 is a critical buffer overflow vulnerability affecting FAST FAC1200R F400_FAC1200R_Q firmware, specifically within the sub_80435780 function via the password parameter. This flaw carries a CVSS score of 9.8 (CRITICAL), indicating it can be exploited remotely without authentication, leading to complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation, nor publicly available exploit code in Metasploit or ExploitDB, the vulnerability has garnered significant community discussion with 10 mentions, suggesting awareness among researchers.

Impacted Technologies

VendorProductVersion(s)CPE
f400_fac1200r_qCPE matchmatch criteria
cpe:2.3:o:fastcom:fac1200r_firmware:f400_fac1200r_q:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.41%
Probability of exploitation in next 30 days
EPSS Percentile
33.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0041 is in the 11th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

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