Security readout for executives and security teams
Plain-English summary
This is a medium-severity Cisco communications management-interface XSS issue. An attacker must trick an interface user into opening a crafted link. If successful, script could run in that user’s browser session and read sensitive browser-accessible information or alter interface interactions.
Executive priority
Treat as a planned remediation item, not an emergency unless management interfaces are broadly reachable or heavily used. The main business risk is compromise of administrative browser sessions through targeted phishing or link-based deception.
Technical view
Cisco describes multiple input-validation flaws in web-based management interfaces for Unified CM, Unified CM IM&P, Unified CM SME, and Unity Connection. The CVSS 3.1 score is 6.1, network-reachable, low complexity, unauthenticated, but requiring user interaction with changed scope and limited confidentiality/integrity impact.
Likely exposure
Exposure is most relevant where Cisco Unified Communications web management interfaces are reachable by administrators or support users. The bundle’s affected product entry specifically lists Cisco Unity Connection, while the description names additional Cisco Unified Communications products.
Exploitation context
The provided sources do not show active exploitation, and KEV is false. Exploitation depends on social engineering: an attacker persuades an interface user to click a crafted link, causing browser-side script execution in the affected interface context.
Researcher notes
The source bundle labels this as XSS but lists CWE-89, which appears inconsistent with typical XSS classification. Affected version details and fix specifics are not included in the bundle, so rely on Cisco’s advisory for precise applicability.
Mitigation direction
- Review Cisco’s advisory for affected releases, fixed releases, and any official workarounds.
- Apply vendor-recommended updates or mitigations for in-scope Cisco communications products.
- Restrict management-interface access to trusted administrative networks where operationally possible.
- Reduce administrator exposure to unsolicited links while remediation is pending.
Validation and detection
- Inventory Cisco Unity Connection and related Unified Communications management interfaces.
- Confirm product versions against Cisco’s advisory and CVE record.
- Verify whether vendor-recommended fixed releases or mitigations are applied.
- Check whether management interfaces are exposed beyond intended administrator access paths.
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-89: Database access and collection lookup
Injection into data stores can inform collection, data access, and exfiltration detection reviews. 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-2021-1409 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
- 20210407 Cisco Unified Communications Products Cross-Site Scripting VulnerabilitiesCVE reference · vendor-advisory, x_refsource_CISCO
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 Special Elements used in an SQL Command ('SQL Injection')
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.