Security readout for executives and security teams
Plain-English summary
This Dell vulnerability can expose some user credentials from affected switch firmware without authentication. If those credentials are recovered, an attacker could log in with the compromised account’s privileges. The business risk is highest where these switches manage sensitive network segments or shared infrastructure.
Executive priority
Treat this as a high-priority infrastructure remediation item. The issue can turn weak credential protection into privileged network-device access, but current sources do not show confirmed active exploitation.
Technical view
CVE-2021-21507 is a weak password encryption issue affecting Dell EMC Networking X-Series firmware before 3.0.1.8 and Dell EMC PowerEdge VRTX Switch Module firmware before 2.0.0.82. The CVSS 3.1 score is 8.8 with adjacent-network attack vector, low complexity, no privileges, and no user interaction.
Likely exposure
Exposure is likely limited to organizations running the named Dell switch platforms on vulnerable firmware, especially where management access is reachable from adjacent or internal networks. The provided data does not establish broad internet exposure.
Exploitation context
The source bundle says a remote unauthenticated attacker could disclose certain user credentials and potentially use them for access. It does not cite public exploitation, exploit availability, or CISA KEV listing.
Researcher notes
Key constraints are product and firmware confirmation. The CVSS vector uses adjacent network access despite the description saying remote unauthenticated. Evidence is insufficient to claim internet-scale exposure or known exploitation.
Mitigation direction
- Inventory Dell EMC Networking X-Series and PowerEdge VRTX Switch Module firmware versions.
- Upgrade X-Series firmware to 3.0.1.8 or later.
- Upgrade VRTX Switch Module firmware to 2.0.0.82 or later.
- Review Dell advisory guidance before maintenance changes.
- Rotate affected switch credentials if compromise is suspected.
Validation and detection
- Confirm whether any listed Dell switch products exist in the environment.
- Compare installed firmware against the fixed versions named in the advisory.
- Check management access paths from adjacent and internal networks.
- Review authentication logs for unusual switch access using valid accounts.
- Document exceptions where firmware cannot be updated promptly.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-261: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-21507 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.dell.com/support/kbdoc/000185252CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Weak Encoding for Password
Weak Encoding for Password represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.