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CVE Record

CVE-2021-26280: Permission bypass vulnerability in permission manager module

Locally installed application can bypass the permission check and perform system operations that require permission.

HighCVSS 7.9Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This flaw affects vivo’s permission manager on versions earlier than Android 10. A locally installed app could bypass permission checks and perform privileged system operations. Business risk is mainly for organizations with older vivo devices in managed or BYOD fleets.

Executive priority

High priority only where older vivo devices are present. Treat unsupported pre-Android 10 devices as a mobile fleet risk because the issue crosses permission boundaries and may affect confidentiality and availability.

Technical view

CVE-2021-26280 is a CWE-306 missing authorization issue in vivo’s permission manager module. The CVSS 3.1 vector is local, low complexity, low privileges required, user interaction required, changed scope, high confidentiality impact, no integrity impact, and high availability impact.

Likely exposure

Exposure appears limited to vivo devices using the affected permission manager module on versions earlier than Android 10. The source bundle does not identify specific device models, regions, or patch levels.

Exploitation context

The CVE record describes local exploitation by an installed application. KEV is false, and the provided sources do not show active exploitation, public exploit availability, or weaponized use.

Researcher notes

Evidence is limited to the CVE data and vivo advisory reference. The sources do not provide model lists, patch identifiers, exploit details, or detection indicators. Validate exposure through device inventory and vendor applicability checks.

Mitigation direction

  • Check vivo’s advisory for model-specific update guidance.
  • Upgrade affected vivo devices when vendor-supported updates are available.
  • Retire or isolate vivo devices stuck before Android 10.
  • Restrict sideloading and unmanaged app installation on mobile fleets.
  • Remove untrusted locally installed applications from affected devices.

Validation and detection

  • Inventory vivo devices across corporate and BYOD programs.
  • Confirm Android version and vendor build for each device.
  • Identify devices running versions earlier than Android 10.
  • Review MDM records for sideloaded or unmanaged apps.
  • Document unsupported devices requiring replacement or isolation.
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-306: Credential and account abuse lookup

Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. 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-2021-26280 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.9 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:H

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
7.9CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:H1.55.8Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

7.9High
CVSS 3.1 vector shape for CVE-2021-26280Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:H

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
vivoPermission manager moduleVersions earlier than Android 10unaffected
Weakness

CWE details

CWE-306

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

CWE-306 · source CWE mapping

Missing Authentication for Critical Function

Missing Authentication for Critical Function represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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