8.3

CVE-2026-3100: asustor adm Improper Certificate Validation

CVSS: 8.3v4.0HighAnalyzed
Published 25-02-2026Last modified 27-02-2026
Open JSON

Vulnerability summary

CVE-2026-3100 is a high (CVSS 8.3) Improper Certificate Validation vulnerability in asustor adm. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 18.5% of scored vulnerabilities.

Overall risk
33/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.3/10
010
High · v4.0 (CVE.org)
EPSS score
0.27%
0%100%
Low · +0.09 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 25-02-2026
    PublishedVulnerability first disclosed.
  2. 27-02-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

19%

Versus all other CVEs

30-day change

+0.09 pp

From 0.18% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.27%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Asustor2 products
  • adm≥ 4.1.0, ≤ 4.3.3.ROF1 | ≥ 5.0.0, ≤ 5.1.2.RE51
  • data_master≥ 4.1.0.rhu2, ≤ 4.3.3.rof1 | ≥ 5.0.0.ra82, < 5.1.2.reo1

1 vendor · 2 products

References

1 links