Security readout for executives and security teams
Plain-English summary
exacqVision Enterprise Manager 20.12 and earlier can place user-controlled input into web pages without sufficient filtering or encoding. An authenticated low-privilege user could alter content shown in the application. The public sources do not show active exploitation or a confirmed patch version in this bundle.
Executive priority
Treat this as a moderate-priority application hygiene issue. It is not currently source-supported as exploited, but affected security-management software should be updated or access-restricted because authenticated users may tamper with displayed web content.
Technical view
CVE-2021-27658 is a CWE-79 cross-site scripting issue in Johnson Controls exacqVision Enterprise Manager through 20.12. CVSS 3.1 is 4.3: network-accessible, low complexity, low privileges required, no user interaction, unchanged scope, and low integrity impact only.
Likely exposure
Exposure is likely limited to organizations running exacqVision Enterprise Manager version 20.12 or earlier. Risk increases where the management interface is reachable by many internal users, weakly governed accounts, or broader network segments.
Exploitation context
The source bundle does not identify active exploitation, and the CVE is not listed as KEV. Exploitation requires some authenticated access. Impact is described as integrity-only, meaning altered web content rather than disclosed data or service outage.
Researcher notes
Sources support affected product, version range, CWE-79 classification, CVSS vector, and non-KEV status. The bundle does not provide payload details, exploit maturity, fixed version, or detailed vendor workaround, so remediation should be tied to current Johnson Controls guidance.
Mitigation direction
- Review Johnson Controls and CISA guidance for fixed versions or vendor mitigations.
- Upgrade exacqVision Enterprise Manager if vendor guidance identifies a corrected release.
- Restrict Enterprise Manager access to trusted administrative networks and users.
- Enforce least privilege for accounts with access to the web interface.
- Monitor application activity for unexpected content changes or suspicious authenticated actions.
Validation and detection
- Inventory exacqVision Enterprise Manager deployments and record installed versions.
- Flag any deployment running version 20.12 or earlier as potentially affected.
- Confirm whether the web interface is reachable beyond trusted networks.
- Review account roles with access to Enterprise Manager.
- Check vendor advisory pages for current remediation details.
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-2021-27658 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
- 4.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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:L/UI:N/S:U/C:N/I:L/A:N2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.johnsoncontrols.com/cyber-solutions/security-advisoriesCVE reference · x_refsource_CONFIRM
- ICS-CERT AdvisoryCVE reference · third-party-advisory, x_refsource_CERT
- ICS-CERT AdvisoryCVE reference · third-party-advisory, x_refsource_CERT
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.