Vulnerability report

Exploited in the wild Confirmed confidence In CISA KEV

CVE-2021-1782

iOS and iPadOS

Apple / iOS and iPadOS · affected before 14.4

Watch CVE-2021-1782 Browse KEV feed
Severity
CVSS 7.0 · High
Confidence
Confirmed
Exploit status
Exploited in the wild
EPSS
2.2%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2021-1782 is a vulnerability affecting Apple iOS and iPadOS, macOS. A race condition was addressed with improved locking. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security...

Is it exploited?

Yes. Previdian tracks this CVE as a known exploited vulnerability. Confidence is confirmed. Listed in CISA KEV.

Who is affected?

Apple / iOS and iPadOS affected before 14.4.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

A race condition was addressed with improved locking

A race condition was addressed with improved locking. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4.

A malicious application may be able to elevate privileges. Apple is aware of a report that this issue may have been actively exploited..

Apple Affected
iOS and iPadOS
Before 14.4
Apple Affected
macOS
Before 11.2 Before 7.3 Before 14.4
Published
02 Apr 2021
Exploitation Reported
03 Nov 2021
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None

Tags

macos cisa ios

CVE References

Exploitation evidence

Why Previdian marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CISA

Recorded 03 Nov 2021

A trusted third party reported exploitation.

Proof of concept available

GitHub

Recorded 10 Feb 2021

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

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Source Added
CISA First 2021-11-03 00:00 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
0
0
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

No detection artifacts or sensor request patterns are available for this CVE yet.

Check back as sensor telemetry and scanner integrations are updated.

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

7.0 High

Potential damage if exploited. Separate from whether attackers are using it.

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

EPSS

2.2%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Improper Locking CWE-667

All CVSS Scores

CVSS v3.1 7.0 High

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

CVSS v2.0 6.9 Medium

AV:L/AC:M/Au:N/C:C/I:C/A:C

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

synacktiv/CVE-2021-1782

github · Created 2021-02-10 14:38:05 UTC · 39 stars · AI assessment 90%

Timeline

From disclosure to observed exploitation

  1. 00:00 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  2. 17:59 UTC

    CVE published

    Vulnerability disclosed publicly

  3. 14:38 UTC

    Public PoC available

    Public proof-of-concept code published

  4. 00:00 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2021-1782

Sample API response 
{
  "cve_id": "CVE-2021-1782",
  "confidence": "Confirmed",
  "cvss_score": 7.0,
  "cvss_estimated": false,
  "epss_score": 0.02222,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}