Security readout for executives and security teams
Plain-English summary
Cisco DCNM’s web management interface has flaws that could let a logged-in network-operator trigger browser-side attacks against another interface user. The issue is medium severity because it requires privileges and user interaction, but it still matters for teams managing data center networks.
Executive priority
Treat as a scheduled remediation item, not an emergency, unless DCNM is broadly reachable or many lower-trust users have network-operator access. Prioritize reducing management-plane exposure and confirming Cisco’s fixed-release guidance.
Technical view
CVE-2021-1250 covers multiple input-validation issues in Cisco Data Center Network Manager. A remote attacker with network-operator privileges could perform XSS or reflected file download attacks against a user of the web interface. CVSS 3.1 is 6.5 with network access, low complexity, low privileges, required user interaction, and changed scope.
Likely exposure
Exposure is most likely in organizations running Cisco Data Center Network Manager where the web interface is reachable by authenticated network-operator accounts and used by administrators or operators.
Exploitation context
The bundle does not show CISA KEV listing or active exploitation evidence. Exploitation requires an attacker who already has network-operator privileges and requires interaction from a DCNM interface user.
Researcher notes
Evidence is limited to the CVE summary and Cisco advisory reference. The bundle does not include affected version ranges, fixed versions, detailed endpoints, or proof-of-concept information. Do not infer unauthenticated exposure or active exploitation.
Mitigation direction
- Review Cisco’s advisory for affected and fixed DCNM releases before planning changes.
- Apply vendor-recommended updates or mitigations where applicable.
- Restrict DCNM management interface access to trusted administrative networks.
- Limit network-operator privileges to users who need them.
- Warn DCNM users to treat unexpected interface links or downloads cautiously.
Validation and detection
- Inventory Cisco DCNM instances and confirm deployed versions.
- Check whether the DCNM web interface is reachable beyond trusted management networks.
- Review account roles for unnecessary network-operator privileges.
- Confirm remediation status against Cisco’s advisory, not generic version assumptions.
- Look for suspicious DCNM web-interface activity involving privileged operator accounts.
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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Open ATT&CK lookupCVE-2021-1250 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
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
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:R/S:C/C:L/I:L/A:L2.33.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- 20210120 Cisco Data Center Network Manager 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 Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.