TI-2026-65072 Aliases CVE-2026-101039 GHSA-6x6g-w7q4-663p

FAST FAC1900R devdiscover Service copy_msg_element stack-based overflow

HIGH 82CWE-119Published 2026-09-28 · Updated 2026-09-28

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

A vulnerability was identified in FAST FAC1900R 20190827_2.0.2. Affected by this issue is the function copy_msg_element of the component devdiscover Service. Such manipulation leads to stack-based buffer overflow. The attack can be executed remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00743 54th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
FAST	FAC1900R	20190827_2.0.2	—	No fix listed	CNA

FAC1900R VendorFAST Affected 20190827_2.0.2 Fixed in — No fix listed CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:fast:fac1900r::::::::	—	—	FAST

cpe:2.3:a:fast:fac1900r:*:*:*:*:*:*:*:* Versions — — ·FAST

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-101039
2026-10-03 Alias added: GHSA-6x6g-w7q4-663p

References

Exploit 1

https://github.com/xiaobor123/vuls-find-VxWorks/tree/main/vul-find-FAST_FAC1900R-copy_msg_element(2)

TI-2026-63735 Fast FAC1203R Gigabit Edition Device Discovery Service copy_msg_element stack-based overflow CVSS 4.0CRITICAL 10.0
TI-2026-65181 FAST FAC1203R MmtAtePrase _tWlanTask stack-based overflow CVSS 4.0CRITICAL 9.4
TI-2026-65071 FAST FAC1200R MmtAtePrase stack-based overflow CVSS 4.0CRITICAL 9.4
TI-2026-65070 FAST FAC1200R devdiscover Service parse_advertisement_frame stack-based overflow CVSS 4.0CRITICAL 9.4
TI-2026-63836 Fast FAC1900R uhttpd get_alias_name stack-based overflow CVSS 4.0MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences