Security readout for executives and security teams
Plain-English summary
Cisco EPNM has a REST API flaw that can expose sensitive application information to someone who already has authenticated access. This is not a remote unauthenticated takeover, but it can materially increase risk if EPNM accounts are compromised, overprivileged, or widely available.
Executive priority
Treat as a moderate-priority management-plane confidentiality issue. Prioritize if EPNM is internet-reachable, broadly accessible internally, or used in sensitive network operations. The main business risk is disclosure of information that could help an attacker understand or target the environment.
Technical view
CVE-2021-34707 is a CWE-200 information disclosure issue in Cisco EPNM REST API responses. The application insufficiently protects sensitive data returned by an API request. CVSS 3.1 is 6.5: network exploitable, low complexity, low privileges required, no user interaction, high confidentiality impact.
Likely exposure
Exposure is limited to environments running Cisco Evolved Programmable Network Manager with authenticated users able to reach the REST API. The source bundle does not identify exact affected or fixed versions, so product inventory and Cisco advisory review are required.
Exploitation context
The bundle does not show CISA KEV listing or other evidence of active exploitation. Exploitation requires authenticated remote access and could disclose sensitive application information, potentially supporting follow-on attacks or operational intelligence gathering.
Researcher notes
Evidence is limited to the CVE record and Cisco advisory metadata in the provided bundle. No affected version list, fixed release, workaround, or exploitation evidence is included here. Avoid assuming broader Cisco product impact without vendor confirmation.
Mitigation direction
- Review Cisco's advisory for affected and fixed EPNM releases.
- Upgrade or apply vendor-recommended remediation when confirmed applicable.
- Restrict EPNM management and API access to trusted networks.
- Review EPNM account privileges and remove unnecessary access.
- Monitor authenticated REST API activity for unusual data access.
Validation and detection
- Inventory all Cisco EPNM deployments and exposed management interfaces.
- Confirm running versions against Cisco's advisory.
- Verify whether authenticated users can reach EPNM REST APIs.
- Review logs for unusual authenticated REST API queries.
- Confirm remediation status after applying Cisco guidance.
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-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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-2021-34707 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:N/S:U/C:H/I:N/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:H/I:N/A:N2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20210804 Cisco Evolved Programmable Network Manager Sensitive Information Disclosure 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.
Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.