CVE-2026-101039

CRITICAL 10.0

FAST FAC1900R devdiscover Service copy_msg_element stack-based overflow

CVSS Score

10.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-121 CWE-119
Vendor	fast
Product	fac1900r
Published	Sep 28, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

FAST / FAC1900R

20190827_2.0.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/410907 vuldb.com: https://vuldb.com/vuln/410907/cti vuldb.com: https://vuldb.com/cve/CVE-2026-101039 vuldb.com: https://vuldb.com/submit/927251 github.com: https://github.com/xiaobor123/vuls-find-VxWorks/tree/main/vul-find-FAST_FAC1900R-copy_msg_element(2)

Credits

🔍 xiaobor123 (VulDB User) VulDB CNA Team