CVE-2026-101039: FAST FAC1900R devdiscover Service copy_msg_element stack-based overflow

Severity: critical (CVSS 10.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-28 · updated 2026-09-28
Weakness: CWE-119

Description

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.

Affected products

Fast FAC1900R: 20190827_2.0.2

References

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

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