Security readout for executives and security teams
Plain-English summary
This issue affects Cisco SPA100 analog telephone adapters. An attacker already on the adjacent network and able to log in to the default-enabled web management interface could run code with elevated privileges. For executives, the concern is compromise of legacy voice infrastructure, not broad internet-scale exposure based on the provided sources.
Executive priority
Treat as high priority for environments still using SPA100 devices. The exploitation path is not remote internet unauthenticated in the provided data, but successful exploitation gives elevated code execution on infrastructure that may be poorly monitored and long-lived.
Technical view
CVE-2019-15243 covers multiple input-validation flaws in the Cisco SPA100 web-based management interface. The CVE cites CWE-119 and CVSS 8.0. Exploitation requires adjacent network access and low privileges, with no user interaction, and can lead to high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most likely where Cisco SPA112 or SPA100-family ATAs remain deployed and their web management interface is reachable from local or adjacent networks. The supplied affected list specifically names Cisco SPA112; broader SPA100 scope comes from the advisory title and description.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation. The attacker must authenticate to the web interface from an adjacent network and send crafted requests. Because the interface is enabled by default, weak access controls or shared management networks increase risk.
Researcher notes
Evidence is limited to the CVE record and Cisco advisory reference in the bundle. Do not assume affected versions, patch names, or exploit availability beyond those sources. Validation should focus on asset presence, management-interface reachability, authentication exposure, and vendor-advisory remediation status.
Mitigation direction
- Check Cisco's advisory for fixed firmware or supported remediation guidance.
- Inventory Cisco SPA112 and SPA100 ATAs in voice and branch networks.
- Restrict web management access to trusted administrative networks only.
- Review management-interface credentials and remove unnecessary accounts.
- Retire or isolate unsupported affected adapters where vendor remediation is unavailable.
Validation and detection
- Confirm whether Cisco SPA112 or SPA100-family ATAs are deployed.
- Verify whether the web-based management interface is enabled and reachable.
- Check firmware and remediation status against Cisco's advisory.
- Review network segmentation around voice and device-management networks.
- Look for unexpected administrative access to affected ATA management interfaces.
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-119: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2019-15243 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
- High
- CVSS
- 8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H2.15.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8HighVector: CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20191016 Cisco SPA100 Series Analog Telephone Adapters Remote Code Execution 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 Restriction of Operations within the Bounds of a Memory Buffer
Improper Restriction of Operations within the Bounds of a Memory Buffer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.