TI-2026-65071 Aliases CVE-2026-101038 GHSA-49h3-g5vf-r66w

FAST FAC1200R MmtAtePrase stack-based overflow

HIGH 76CWE-119Published 2026-09-28 · Updated 2026-09-28

Key facts

Attack vector: Network
Privileges required: Low
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 determined in FAST FAC1200R 5.0_20201119_1.0.2. Affected by this vulnerability is the function MmtAtePrase of the component MmtAtePrase Parser. This manipulation causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized. 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 0.00445 38th 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: No
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	FAC1200R	5.0_20201119_1.0.2	—	No fix listed	CNA

FAC1200R VendorFAST Affected 5.0_20201119_1.0.2 Fixed in — No fix listed CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:fast:fac1200r::::::::	—	—	FAST

cpe:2.3:a:fast:fac1200r:*:*:*:*:*:*:*:* Versions — — ·FAST

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-101038
2026-10-03 Alias added: GHSA-49h3-g5vf-r66w

References

Exploit 1

https://github.com/xiaobor123/vuls-find-VxWorks/tree/main/vul-find-FAST_FAC1200R-twlantask-MmtAtePrase-stack-overflow(1)/vul-find-FAST_FAC1200R-twlantask-MmtAtePrase-stack-overflow

TI-2026-65072 FAST FAC1900R devdiscover Service copy_msg_element stack-based overflow CVSS 4.0CRITICAL 10.0
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-2026-65070 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