Security readout for executives and security teams
Plain-English summary
Cisco TMS has a stored cross-site scripting issue in its web management interface. A highly privileged authenticated attacker could save malicious data that runs script code when another interface user views it. Business impact is mainly account/session exposure and unauthorized actions within the management interface, not direct system takeover.
Executive priority
Handle in normal vulnerability management unless Cisco TMS is broadly reachable or heavily used. Prioritize confirming deployment, vendor guidance, and administrator access controls. No source in the bundle supports emergency treatment based on active exploitation.
Technical view
CVE-2021-34760 is CWE-79 in Cisco TelePresence Management Suite. Cisco/CVE describe insufficient input validation in a specific web-interface data field. CVSS 3.0 is 4.8: network reachable, low attack complexity, high privileges required, user interaction required, changed scope, low confidentiality and integrity impact, no availability impact.
Likely exposure
Exposure is limited to organizations running Cisco TelePresence Management Suite with accessible web-based management. Risk is higher where many administrators or operators can edit interface fields and where browser sessions have broad TMS privileges. Source data does not provide affected version ranges.
Exploitation context
The bundle does not cite active exploitation, and the CVE is not listed as KEV. Exploitation requires an authenticated remote attacker with high privileges and a victim user who interacts with the affected management interface.
Researcher notes
The public bundle identifies the product, weakness class, CVSS vector, and general stored-XSS behavior, but omits affected version ranges and named fixed releases. Avoid assuming exploit availability or workaround details without consulting the Cisco advisory directly.
Mitigation direction
- Review Cisco's advisory for affected and fixed release guidance.
- Restrict Cisco TMS management access to trusted administrative networks.
- Limit high-privilege TMS accounts to necessary users only.
- Monitor TMS changes for suspicious stored script-like content.
Validation and detection
- Inventory whether Cisco TelePresence Management Suite is deployed.
- Confirm TMS version status against Cisco's advisory and CVE record.
- Review who has high-privilege access to the TMS interface.
- Inspect recent management-field changes for unexpected active content.
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-2021-34760 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
- 4.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:H/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:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N1.72.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
4.8MediumVector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20211020 Cisco TelePresence Management Suite Stored Cross-Site Scripting VulnerabilityCVE 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.