Security readout for executives and security teams
Plain-English summary
This flaw affects Cisco SPA100 Series analog telephone adapters, with the bundle specifically listing the Cisco SPA112. A logged-in attacker on the same adjacent network could abuse the default-enabled web management interface to run code with elevated privileges. Business risk is highest where these devices bridge voice services and internal networks.
Executive priority
Prioritize this for legacy voice infrastructure. The flaw is high severity and can give elevated code execution, but exploitation requires local adjacency and authentication. Address exposed management interfaces first, then confirm whether devices can be updated or should be replaced.
Technical view
CVE-2019-15242 is a CWE-119 input validation issue in the web-based management interface of affected Cisco SPA100 ATA devices. With low-privileged authentication and adjacent network access, an attacker can send crafted requests that may execute arbitrary code with elevated privileges. CVSS is 8.0 high.
Likely exposure
Exposure is likely limited to environments running Cisco SPA112 or related SPA100 ATA devices where web management is reachable from adjacent networks. The interface is enabled by default, so legacy voice deployments may be exposed even if administrators did not intentionally enable management access.
Exploitation context
The source bundle supports authenticated, adjacent-network exploitation with low attack complexity and no user interaction. It does not show CISA KEV listing or any cited evidence of active exploitation. Treat exploit status as unconfirmed unless vendor or threat-intelligence sources indicate otherwise.
Researcher notes
The evidence is specific on attack conditions and impact but incomplete on fixed versions in the provided bundle. Avoid broad product claims beyond Cisco SPA100 Series and the listed SPA112 unless confirmed in Cisco’s advisory. No active exploitation claim is supported here.
Mitigation direction
- Review Cisco’s advisory for supported fixes, firmware guidance, or replacement direction.
- Inventory Cisco SPA112 and SPA100 ATA devices across voice and branch networks.
- Restrict web management access to trusted administrative networks only.
- Remove unnecessary low-privilege management accounts and rotate credentials.
- Monitor vendor guidance if devices are unsupported or cannot be updated.
Validation and detection
- Confirm whether Cisco SPA112 or SPA100 ATA devices are deployed.
- Check whether the web-based management interface is enabled and reachable.
- Verify firmware and support status against Cisco’s advisory.
- Review management access paths from adjacent voice or user networks.
- Look for unexpected administrative logins or management interface activity.
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-2019-15242 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.