Buffer overflow in Fast Fac1200r
CVE-2026-101038
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Fast Fac1200r — versions 5.0_20201119_1.0.2
Weakness classification (CWE)
References
- vuldb.com/vuln/410906 (technical-description, vdb-entry)
- vuldb.com/vuln/410906/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-101038 (third-party-advisory)
- vuldb.com/submit/927237 (third-party-advisory)
- github.com/xiaobor123/vuls-find-VxWorks/tree/main/vul-find-FAST_FAC1200R-twlant… (exploit)
Frequently asked questions
- What is CVE-2026-101038?
- CVE-2026-101038 is a critical-severity vulnerability in Fast Fac1200r, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.9/10. Published 2026-09-28.
- How severe is CVE-2026-101038?
- Critical severity. CVSS v3 base score is 9.9 out of 10.