Security readout for executives and security teams
Plain-English summary
Cisco SPA100 Series analog telephone adapters can be taken over by someone who can reach and log in to the device management interface. The issue matters because successful exploitation can run code with elevated privileges, affecting confidentiality, integrity, and availability. The bundle does not cite active exploitation.
Executive priority
Treat this as a high-priority legacy network-device risk. It is not described as actively exploited, but compromise could give elevated control of telephony adapter devices and disrupt voice services or support lateral activity on local networks.
Technical view
CVE-2019-15251 is an authenticated, adjacent-network remote code execution flaw in the Cisco SPA100 Series ATA web-based management interface, enabled by default. Improper validation of user-supplied input can let a low-privileged authenticated attacker send crafted requests and execute arbitrary code with elevated privileges. CVSS v3.0 is 8.0.
Likely exposure
Exposure is most likely where Cisco SPA100 Series ATAs, specifically the listed Cisco SPA112 2-Port Phone Adapter, are still deployed and reachable on local or adjacent networks with web management enabled.
Exploitation context
The source bundle describes authenticated adjacent-network exploitation with low complexity and no user interaction. It does not cite public exploitation, CISA KEV listing, exploit maturity, or internet-wide unauthenticated exposure.
Researcher notes
The bundle names Cisco SPA100 Series ATAs and lists Cisco SPA112 as affected, but does not provide version ranges or patch details. Validation should focus on asset identification, management-interface exposure, authentication control, and mapping deployed firmware to Cisco guidance.
Mitigation direction
- Review the Cisco advisory for fixed software, replacement, or lifecycle guidance.
- Inventory Cisco SPA100 Series and SPA112 ATA devices in all sites.
- Restrict web management reachability to trusted administrative networks.
- Disable unnecessary management exposure where supported by vendor guidance.
- Rotate management credentials if suspicious access is found.
Validation and detection
- Confirm whether any Cisco SPA112 or SPA100 Series ATAs are deployed.
- Check whether the web-based management interface is enabled.
- Verify management access is limited to intended adjacent administrative users.
- Review device logs for unexpected management authentication or configuration changes.
- Track remediation status against the Cisco advisory.
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
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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-2019-15251 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.