Security readout for executives and security teams
Plain-English summary
Dell Wyse ThinLinux2 systems before 2.1.0.01 used a hard-coded cryptographic key in the Wyse Password Encoder. If an attacker reverse engineered the encoder, locally stored encrypted passwords or similar ciphertext could be decrypted, creating a serious credential exposure risk.
Executive priority
Treat as a high-priority credential protection issue for Dell Wyse thin-client environments. Prioritize upgrade and credential review where these devices support privileged access, shared accounts, or operational workflows.
Technical view
CVE-2018-15781 is a hard-coded cryptographic key flaw in Dell Wyse Password Encoder for ThinLinux2 before 2.1.0.01. The CVSS 3.0 score is 7.9, with no privileges required, high attack complexity, user interaction required, changed scope, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is likely limited to environments running Dell Wyse ThinLinux2 versions earlier than 2.1.0.01 that use the Wyse Password Encoder and store affected ciphertext locally.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. The described attack requires reverse engineering the cryptographic system to recover the hard-coded private key and decrypt local ciphertext.
Researcher notes
Evidence is narrow but clear: the weakness is a hard-coded private key enabling decryption of locally stored ciphertext. The bundle does not provide exploit code, public exploitation evidence, or detailed Dell remediation text beyond affected versions.
Mitigation direction
- Upgrade ThinLinux2 to version 2.1.0.01 or later.
- Review Dell advisory SLN316104 for vendor-approved remediation details.
- Identify credentials protected by the affected encoder.
- Rotate affected credentials where ciphertext exposure is plausible.
- Restrict access to stored ciphertext until remediation is complete.
Validation and detection
- Inventory Dell Wyse ThinLinux2 endpoints and record installed versions.
- Confirm no managed device remains below ThinLinux2 2.1.0.01.
- Verify whether Wyse Password Encoder is used in device configuration workflows.
- Locate systems storing ciphertext generated by the affected encoder.
- Check remediation evidence against Dell advisory SLN316104.
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
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Credential 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-2018-15781 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.9 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:A/AC:H/PR:N/UI:R/S:C/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:3.0/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H1.26Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.9HighVector: CVSS:3.0/AV:A/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.dell.com/support/article/SLN316104CVE 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.