Security readout for executives and security teams
Plain-English summary
CVE-2026-0618 is a medium-severity cross-site scripting issue in Devolutions PowerShell Universal. An attacker could cause a user to interact with malicious content and potentially run script in that user’s browser context. The expected impact is limited confidentiality and integrity loss, with no availability impact indicated.
Executive priority
Treat as a routine but timely web-application security update. Prioritize exposed administrative portals and environments where administrators frequently interact with user-supplied content. No public evidence of active exploitation is provided.
Technical view
The issue is CWE-79 XSS affecting Devolutions PowerShell Universal before 4.5.6 and before 5.6.13. CVSS 3.1 is 6.1: network exploitable, low complexity, no privileges required, user interaction required, scope changed, low confidentiality and integrity impact, no availability impact.
Likely exposure
Organizations running internet-facing or internally accessible PowerShell Universal instances below 4.5.6 or 5.6.13 may be exposed. Risk is higher where untrusted users can influence content viewed by administrators or other privileged users.
Exploitation context
The provided sources do not report active exploitation, and this CVE is not marked in CISA KEV. Exploitation requires user interaction, so phishing or malicious links/content are plausible contexts, but no exploit method is provided in the sources.
Researcher notes
The public record identifies XSS but does not include detailed vulnerable endpoints or proof-of-concept behavior. Validate exposure by version and deployment reachability, not by attempting exploitation. Use the vendor advisory as the authoritative remediation reference.
Mitigation direction
- Upgrade PowerShell Universal to 4.5.6, 5.6.13, or later as applicable.
- Review the Devolutions advisory for environment-specific guidance.
- Limit access to PowerShell Universal to trusted networks where possible.
- Warn administrators against opening untrusted links or content in active sessions.
Validation and detection
- Inventory all Devolutions PowerShell Universal deployments.
- Confirm each instance version is 4.5.6, 5.6.13, or later.
- Check whether instances are internet-facing or broadly accessible internally.
- Review application logs for suspicious user-driven browser activity if concerned.
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-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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 lookupCVE-2026-0618 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
- Medium
- CVSS
- 6.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N2.82.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://devolutions.net/security/advisories/DEVO-2026-0001/CVE reference
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.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.