CVE-2025-26516VulnerabilityPublished 19 Sep 2025

CVE-2025-26516: NetApp StorageGRID · Asymmetric Resource Consumption (Amplification)

Affects NetApp StorageGRIDSource CVE Database V5

Not known to be exploited · CVSS 5.3 Medium.

Data as of 26 Oct 2026, 07:57 UTC

CVSS 3.1 base score

5.3Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.3% chance of exploitation in 30 days – higher than 32% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: Low

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the impacted component are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 19 Sep 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
NetApp StorageGRID	Affected =0	Fixed in–

AI-suggested

European organizations should prioritize upgrading NetApp StorageGRID to versions 11.8.0.15 or 11.9.0.8 or later, where this vulnerability is addressed. In the absence of immediate patch availability, network-level mitigations such as rate limiting, traffic filtering, and anomaly detection on the Admin node's management interfaces should be implemented to reduce exposure to amplification attacks. Restricting access to the Admin node to trusted IP ranges via firewall rules or VPN tunnels can minimize attack surface. Monitoring resource utilization metrics on Admin nodes for unusual spikes can provide early warning signs of exploitation attempts. Organizations should also review and harden their incident response plans to handle potential DoS events impacting storage infrastructure. Engaging with NetApp support for any available interim fixes or workarounds is recommended. Finally, maintaining up-to-date asset inventories and ensuring that StorageGRID deployments are segmented from general network traffic can limit the blast radius of any successful attack.

Description

StorageGRID (formerly StorageGRID Webscale) versions prior to 11.8.0.15 and 11.9.0.8 are susceptible to a Denial of Service vulnerability. Successful exploit could allow an unauthenticated attacker to cause a Denial of Service on the Admin node.

Impact

For European organizations, the impact of this vulnerability can be significant, especially for enterprises and service providers relying on NetApp StorageGRID for scalable object storage solutions. Disruption of the Admin node can halt management operations, delay incident response, and complicate data availability assurance. Sectors such as finance, healthcare, telecommunications, and public administration, which often handle large volumes of unstructured data and require high availability, could face operational downtime and compliance risks. Although the vulnerability does not directly compromise data confidentiality or integrity, the denial of service could indirectly affect business continuity and regulatory adherence, particularly under GDPR mandates that emphasize data availability and resilience. Additionally, the unauthenticated nature of the exploit increases the risk profile, as attackers do not need credentials or insider access, making perimeter defenses critical. The lack of known exploits currently provides a window for proactive mitigation before widespread attacks emerge.

CWE-405Asymmetric Resource Consumption (Amplification) (opens in a new tab)
Class weakness
The product does not properly control situations in which an adversary can cause the product to consume or produce excessive resources without requiring the adversary to invest equivalent work or otherwise prove authorization, i.e., the adversary's influence is "asymmetric."
Architecture and Design
An application must make resources available to a client commensurate with the client's access level.
Architecture and Design
An application must, at all times, keep track of allocated resources and meter their usage appropriately.
System Configuration
Consider disabling resource-intensive algorithms on the server side, such as Diffie-Hellman key exchange.
OWASP Cheat Sheets
File Upload (opens in a new tab)
OWASP ASVS 4.0.3
V12.1.1 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

security.netapp.com/advisory/NTAP-20250910-0003 (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 19 Sep 2025, 19:24 UTC

WeaknessesCWE-405

Technical details

References

Community reviews

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