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CVE Record

CVE-2019-1956: Cisco SPA112 2-Port Phone Adapter Stored Cross-Site Scripting Vulnerability

A vulnerability in the web-based interface of the Cisco SPA112 2-Port Phone Adapter could allow an authenticated, remote attacker to conduct a cross-site scripting (XSS) attack against another user of the device. The vulnerability is due to insufficient validation of user-supplied input by the web-based interface of the affected device. An attacker could exploit this vulnerability by inserting malicious code in one of the configuration fields. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.

MediumCVSS 4.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This issue affects Cisco SPA112 phone adapters. A logged-in attacker with high privileges could save script content in a configuration field. If another administrator later views that interface, the script may run in their browser, potentially exposing browser-based information or altering interface behavior.

Executive priority

Treat this as a moderate-priority network device hygiene issue. It is not reported as actively exploited, but management interfaces are sensitive and should be patched or restricted according to Cisco guidance.

Technical view

CVE-2019-1956 is a stored XSS flaw in the SPA112 web-based management interface caused by insufficient validation of user-supplied configuration input. The CVSS 3.0 score is 4.8, with network reachability, low attack complexity, high privileges required, and user interaction required.

Likely exposure

Exposure is limited to Cisco SPA112 2-Port Phone Adapter devices with accessible web administration. Risk is highest where multiple administrators use the interface or management access is reachable beyond trusted networks.

Exploitation context

The provided sources do not report active exploitation, and the CVE is not listed as KEV. Exploitation requires authenticated high-privilege access and another user viewing affected interface content.

Researcher notes

Key constraints are PR:H and UI:R, so this is not a drive-by internet exploit based on the source data. The bundle does not specify affected firmware versions or exact fixed releases, so validation depends on Cisco advisory details.

Mitigation direction

  • Review the Cisco advisory for fixed software or vendor workarounds.
  • Restrict SPA112 web administration to trusted management networks.
  • Limit administrative accounts to users with a business need.
  • Remove or disable unused SPA112 devices from production networks.
  • Monitor configuration changes for unexpected or suspicious field content.

Validation and detection

  • Inventory Cisco SPA112 2-Port Phone Adapter devices.
  • Compare device software status against the Cisco advisory.
  • Confirm the web interface is not exposed to untrusted networks.
  • Review administrator access lists for excessive privileges.
  • Check recent configuration changes for unexpected entries.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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 · medium confidence lookup

CWE-79: User-session and phishing behavior lookup

Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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.

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cve · low confidence lookup

CVE-2019-1956 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.8 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
4.8CVSS 3.0MediumCVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N1.72.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

4.8Medium
CVSS 3.0 vector shape for CVE-2019-1956Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
CiscoCisco SPA112 2-Port Phone AdapterunspecifiedListed
Weakness

CWE details

CWE-79

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.