Security readout for executives and security teams
Plain-English summary
CVE-2021-26281 is an information disclosure issue in Vivo's Alarm clock module. Some parameters were stored improperly, which could expose sensitive information. The listed impact is confidentiality only, with no integrity or availability effect described.
Executive priority
Treat this as a moderate-priority mobile confidentiality risk. Prioritize environments with managed Vivo devices or sensitive users, but current evidence does not support emergency response.
Technical view
The CVE is classified as CWE-200. It affects Vivo Alarm clock versions earlier than 6.0.1.2. CVSS 3.1 is 5.5 with local access, high attack complexity, no privileges, required user interaction, changed scope, and high confidentiality impact.
Likely exposure
Exposure appears limited to Vivo environments using Alarm clock versions earlier than 6.0.1.2. The source bundle provides no CPEs, deployment details, or affected device list.
Exploitation context
The source bundle does not indicate active exploitation, public exploit availability, or KEV listing. Attack conditions are constrained by local access, high complexity, and required user interaction.
Researcher notes
Public details are sparse. The record names improper storage of alarm clock parameters but does not identify exact data, affected devices, exploit method, or remediation mechanics beyond the version boundary.
Mitigation direction
- Identify Vivo devices with the Alarm clock module installed.
- Check whether the module version is earlier than 6.0.1.2.
- Follow Vivo advisory guidance for updating affected versions.
- Reduce sensitive data exposure on affected devices until updated.
- Track vendor security advisories for additional remediation details.
Validation and detection
- Inventory Vivo device models and Alarm clock module versions.
- Confirm version status against the Vivo advisory threshold.
- Review mobile management telemetry for affected devices where available.
- Document whether affected devices can receive vendor updates.
- Reassess after updates to confirm version 6.0.1.2 or later.
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-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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 lookupCVE-2021-26281 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
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N
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:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N14Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.vivo.com/en/support/security-advisory-detail?id=9CVE reference
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.
Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.