CVE-2025-50402: Classic Buffer Overflow
Source CVE Database V5
Not known to be exploited · CVSS 9.8 Critical.
Data as of 26 Oct 2026, 13:47 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 36% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 26 Nov 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
AI-suggested
- Implement strict network segmentation to isolate FAST FAC1200R devices from untrusted networks and limit exposure to potential attackers.
- Employ access control lists (ACLs) and firewall rules to restrict management interface access to trusted IP addresses only.
- Monitor network traffic for unusual patterns or attempts to exploit the fac_password parameter, using intrusion detection/prevention systems (IDS/IPS) with custom signatures if possible.
- Disable or restrict remote management interfaces if not required, or enforce VPN access with strong authentication for remote administration.
- Conduct thorough inventory and asset management to identify all FAST FAC1200R devices in the environment.
- Engage with the vendor for updates or patches and apply them immediately once available.
- Prepare incident response plans specific to network device compromise scenarios.
- Consider deploying virtual patching techniques via network security appliances to block exploit attempts until official patches are released.
Description
FAST FAC1200R F400_FAC1200R_Q is vulnerable to Buffer Overflow in the function sub_80435780 via the parameter string fac_password.