How severe is CVE-2025-8611?

CVE-2025-8611 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-8611 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-8611?

CVE-2025-8611 affects Aomeitech Cyber Backup. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-8611?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-8611 have an EU (EUVD) identifier?

Yes. CVE-2025-8611 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25388.

When was CVE-2025-8611 published?

CVE-2025-8611 was published on 2025-08-20 and last updated on 2026-06-17.

CVE-2025-8611

CVE-2025-8611 is a critical-severity vulnerability in Aomeitech Cyber Backup with a CVSS 3.x base score of 9.8. 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-306.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-25388
Weakness: CWE-306
Affected product: Aomeitech Cyber Backup
Published: 2025-08-20
Last modified: 2026-06-17

Description

AOMEI Cyber Backup Missing Authentication for Critical Function Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of AOMEI Cyber Backup. Authentication is not required to exploit this vulnerability. The specific flaw exists within the DaoService service, which listens on TCP port 9074 by default. The issue results from the lack of authentication prior to allowing access to functionality. An attacker can leverage this vulnerability to execute code in the context of SYSTEM. Was ZDI-CAN-26158.

Frequently asked questions

What is CVE-2025-8611?: AOMEI Cyber Backup Missing Authentication for Critical Function Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of AOMEI Cyber Backup. Authentication is not required to exploit this vulnerability. The specific flaw exists within the DaoService service, which listens on TCP port 9074 by default. The issue results from the lack of authentication prior to allowing access to functionality. An attacker can leverage this vulnerability to execute code in the context of SYSTEM. Was ZDI-CAN-26158.
How severe is CVE-2025-8611?: CVE-2025-8611 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-8611 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-8611?: CVE-2025-8611 affects Aomeitech Cyber Backup. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-8611?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-8611 have an EU (EUVD) identifier?: Yes. CVE-2025-8611 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25388.
When was CVE-2025-8611 published?: CVE-2025-8611 was published on 2025-08-20 and last updated on 2026-06-17.

References

https://www.zerodayinitiative.com/advisories/ZDI-25-807/

Affected products (1)

cpe:2.3:a:aomeitech:cyber_backup:3.7.0:*:*:*:*:*:*:*

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