CVE-2026-3100

An improper certificate validation vulnerability was found in the FTP Backup on the ADM.

High8.3EPSS 0.19%

Published: 25 Feb 2026
Updated: 27 Feb 2026
Reserved: 24 Feb 2026
Assigned by: ASUSTOR1

Description

The FTP Backup on the ADM will not properly strictly enforce TLS certificate verification while connecting to an FTP server using FTPES/FTPS. An improper validated TLS/SSL certificates allows a remote attacker can intercept network traffic to perform a Man-in-the-Middle (MitM) attack, which may intercept, modify, or obtain sensitive information such as authentication credentials and backup data. Affected products and versions include: from ADM 4.1.0 through ADM 4.3.3.ROF1 as well as from ADM 5.0.0 through ADM 5.1.2.RE51.

Scores

CVSS scores of CVE-2026-3100, by who scored it
Scored by	CVSS	Score	Vector
ASUSTOR1CNA (assigner)	4.0	High8.3	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
NVDNVD · Analyzed	4.0	High8.3	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS (exploitation in 30 days): 0.19% · top 91% of all CVEs (6 Nov 2026)
CISA SSVC: Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.3.

Weakness

CWE-295 Improper Certificate Validation (opens in a new tab)All about CWE-295 and its CVEs

Affected products

ASUSTOR · ADM
- affected 4.1.0 – ≤ 4.3.3.ROF1
- affected 5.0.0 – ≤ 5.1.2.RE51

References (1)

https://www.asustor.com/security/security_advisory_detail?id=53 (opens in a new tab)vendor-advisory

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated 27 Feb 2026, 14:26 UTC.