Security readout for executives and security teams
Plain-English summary
This flaw affects Cisco SPA100 Series analog telephone adapters, including the SPA112 listed in the bundle. A logged-in attacker on an adjacent network could abuse the default-enabled web management interface to run code with elevated privileges, potentially taking control of the device.
Executive priority
Treat as a high-priority remediation item for any remaining Cisco SPA100 deployments, especially in voice, branch, or shared network environments. The business risk is device takeover rather than broad unauthenticated internet exploitation.
Technical view
CVE-2019-15240 is a high-severity input validation flaw in the Cisco SPA100 web-based management interface. It requires adjacent network access and low privileges, but no user interaction. Successful exploitation can provide high confidentiality, integrity, and availability impact through elevated arbitrary code execution.
Likely exposure
Exposure is most likely where Cisco SPA112 or other Cisco SPA100 Series ATAs remain deployed and their web management interface is reachable from local or adjacent networks. The bundle does not specify affected firmware versions.
Exploitation context
The provided sources do not show CISA KEV listing or confirmed active exploitation. Exploitation requires authentication to the management interface and adjacent network reachability, which lowers internet-scale risk but remains serious for shared networks or compromised credentials.
Researcher notes
Key constraints are authentication and adjacent attack vector. The source bundle confirms improper input validation and elevated code execution impact, but does not provide affected version ranges, exploit evidence, or specific fixed releases.
Mitigation direction
- Inventory Cisco SPA112 and SPA100 Series ATA devices.
- Review Cisco's advisory for fixed software or product guidance.
- Restrict web management access to trusted administration networks.
- Disable or tightly limit the web management interface if operationally unnecessary.
- Rotate administrative credentials for exposed or shared ATA management accounts.
Validation and detection
- Confirm whether Cisco SPA112 or SPA100 Series ATAs are deployed.
- Check whether the web management interface is enabled and reachable.
- Compare installed software or firmware against Cisco advisory guidance.
- Review access controls around local and adjacent management networks.
- Look for unexpected authenticated management activity on affected devices.
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
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ATT&CK lookup starting points
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CWE-119: Exact CWE lookup
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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-2019-15240 mapping review
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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.