How severe is CVE-2026-24935?

CVE-2026-24935 has a CVSS 3.x base score of 5.6, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-24935 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-24935?

CVE-2026-24935 affects Asustor Data Master. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-24935?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-24935 have an EU (EUVD) identifier?

Yes. CVE-2026-24935 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5286.

When was CVE-2026-24935 published?

CVE-2026-24935 was published on 2026-02-03 and last updated on 2026-06-17.

CVE-2026-24935

CVE-2026-24935 is a medium-severity vulnerability in Asustor Data Master with a CVSS 3.x base score of 5.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-295.

Key facts

Severity: Medium (CVSS 3.x base score 5.6)
CVSS v4: 6.3
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-5286
Weakness: CWE-295
Affected product: Asustor Data Master
Published: 2026-02-03
Last modified: 2026-06-17

Description

A third-party NAT traversal module fails to validate SSL/TLS certificates when connecting to the signaling server. While subsequent access to device services requires additional authentication, a Man-in-the-Middle (MitM) attacker can intercept or redirect the NAT tunnel establishment. This could allow an attacker to disrupt service availability or facilitate further targeted attacks by acting as a proxy between the user and the device services. 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 5.1.1.RCI1.

Frequently asked questions

What is CVE-2026-24935?: A third-party NAT traversal module fails to validate SSL/TLS certificates when connecting to the signaling server. While subsequent access to device services requires additional authentication, a Man-in-the-Middle (MitM) attacker can intercept or redirect the NAT tunnel establishment. This could allow an attacker to disrupt service availability or facilitate further targeted attacks by acting as a proxy between the user and the device services. 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 5.1.1.RCI1.
How severe is CVE-2026-24935?: CVE-2026-24935 has a CVSS 3.x base score of 5.6, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-24935 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-24935?: CVE-2026-24935 affects Asustor Data Master. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-24935?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-24935 have an EU (EUVD) identifier?: Yes. CVE-2026-24935 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5286.
When was CVE-2026-24935 published?: CVE-2026-24935 was published on 2026-02-03 and last updated on 2026-06-17.

References

https://www.asustor.com/security/security_advisory_detail?id=50

Affected products (1)

cpe:2.3:o:asustor:data_master:*:*:*:*:*:*:*:*

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