PowerStore 500T: Missing Authentication for Critical Functionality
CVE-2026-79687 is a critical-severity missing authentication for critical functionality vulnerability in PowerStore 500T from Dell, with a CVSS 3.1 base score of 10.0 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version 4.3.1.2-2771239 or later as the first without the flaw, so updating PowerStore 500T to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.29% chance of exploitation within 30 days, which is low compared with other CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update PowerStore 500T to 4.3.1.2-2771239 or later or a later version.
- Update PowerStore 1000T to 4.3.1.2-2771239 or later or a later version.
- Update PowerStore 1200T to 4.3.1.2-2771239 or later or a later version.
- Read the advisory on dell.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Dell | PowerStore 500T | before 4.3.1.2-2771239 or later | 4.3.1.2-2771239 or later |
| Dell | PowerStore 1000T | before 4.3.1.2-2771239 or later | 4.3.1.2-2771239 or later |
| Dell | PowerStore 1200T | before 4.3.1.2-2771239 or later | 4.3.1.2-2771239 or later |
| Dell | PowerStore 3000T | before 4.3.1.2-2771239 or later | 4.3.1.2-2771239 or later |
| Dell | PowerStore 3200Q | before 4.3.1.2-2771239 or later | 4.3.1.2-2771239 or later |
| Dell | PowerStore 3200T | before 4.3.1.2-2771239 or later | 4.3.1.2-2771239 or later |
| Dell | PowerStore 5000T | before 4.3.1.2-2771239 or later | 4.3.1.2-2771239 or later |
| Dell | PowerStore 5200Q | before 4.3.1.2-2771239 or later | 4.3.1.2-2771239 or later |
| Dell | PowerStore 5200T | before 4.3.1.2-2771239 or later | 4.3.1.2-2771239 or later |
| Dell | PowerStore 7000T | before 4.3.1.2-2771239 or later | 4.3.1.2-2771239 or later |
| Dell | PowerStore 9000T | before 4.3.1.2-2771239 or later | 4.3.1.2-2771239 or later |
| Dell | PowerStore 9200T | before 4.3.1.2-2771239 or later | 4.3.1.2-2771239 or later |
| Dell | Powerstoreos | 4.1.0.0; 4.1.0.1; 4.1.0.2; 4.1.0.3; 4.1.0.4; 4.1.0.5; 4.3.0.0; 4.3.1.0; and 1 more ranges | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- ChangedThe attack can reach beyond the vulnerable component into other systems.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 9.0 | Critical | CNA (emc.com) |
| CVSS 3.1 | 10.0 | Critical | NVD |
Official description
Dell PowerStore SDNAS contains a Missing Authentication for Critical Function vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to Filesystem access.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Missing Authentication for Critical Functionality
The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
How developers prevent this class of flaw
- For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, consider using libraries with authentication capabilities such as OpenSSL or the ESAPI Authenticator.
- When storing data in the cloud (e.g., S3 buckets, Azure blobs, Google Cloud Storage, etc.), use the provider's controls to require strong authentication for users who should be allowed to access the data.
More Missing Authentication for Critical Functionality vulnerabilities (CWE-306)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in PowerStore 500T
- 8.8 High severity
- 9.1 Critical severity
- 8.1 High severity
- 8.8 High severity
- 8.7 High severity
- 7.2 High severity
Recent Missing Authentication for Critical Functionality vulnerabilities
- 8.2 High severity
- 8.6 High severity
- 7.5 High severity
- 7.0 High severity
- 7.5 High severity
- 7.5 High severity
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