Is CVE-2021-30860 actively exploited?

Yes. KEV Intelligence tracks CVE-2021-30860 as a known exploited vulnerability. Confidence is confirmed.

What exploitation activity has KEV Intelligence observed?

KEV Intelligence has not yet recorded sensor-observed exploitation attempts for CVE-2021-30860. Our sensors continue to monitor for activity targeting this CVE.

Which versions are affected?

CVE-2021-30860 affects Apple macOS and 2 other products. KEV Intelligence lists 4 version rows; examples include unspecified to < 11.6, unspecified to < 2021-005, and unspecified to < 7.6.

Yes. CVE-2021-30860 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Vulnerability report

Exploited in the wild Confirmed confidence In CISA KEV

CVE-2021-30860

Q: How should organizations remediate it?

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

Q: Is it in CISA KEV?

Yes. CVE-2021-30860 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

macOS

Apple / macOS · affected before 11.6

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Severity: CVSS 7.8 · High
Confidence: Confirmed
Exploit status: Exploited in the wild
EPSS: 76.0%
First observed: —
Last observed: —

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2021-30860 is an unauthenticated vulnerability affecting Apple macOS and 2 other products. An integer overflow was addressed with improved input validation. This issue is fixed in Security Update 2021-005...

Is it exploited?

Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is confirmed.

Who is affected?

Apple / macOS affected before 11.6.

What should we do?

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

Overview

An integer overflow was addressed with improved input validation

An integer overflow was addressed with improved input validation. This issue is fixed in Security Update 2021-005 Catalina, iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6, watchOS 7.6.2.

Processing a maliciously crafted PDF may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

Vendor Product Affected Status

Apple macOS Before 11.6 Affected

Apple macOS Before 2021-005 Affected

Apple watchOS Before 7.6 Affected

Apple iOS Before 14.8 Affected

View vendor advisory

Published: 24 Aug 2021
Exploitation Reported: 03 Nov 2021
Attack vector: Local
Complexity: Low
Privileges: None
User interaction: Required

CVE References

CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2021-30860
GLSA-202209-21 security.gentoo.org · Vendor Advisory https://security.gentoo.org/glsa/202209-21
20210917 APPLE-SA-2021-09-13-4 Security Update 2021-005 Catalina seclists.org · Mailing List http://seclists.org/fulldisclosure/2021/Sep/28
20210917 APPLE-SA-2021-09-13-3 macOS Big Sur 11.6 seclists.org · Mailing List http://seclists.org/fulldisclosure/2021/Sep/27
20210917 APPLE-SA-2021-09-13-1 iOS 14.8 and iPadOS 14.8 seclists.org · Mailing List http://seclists.org/fulldisclosure/2021/Sep/25
20210917 APPLE-SA-2021-09-13-2 watchOS 7.6.2 seclists.org · Mailing List http://seclists.org/fulldisclosure/2021/Sep/26
20210921 APPLE-SA-2021-09-20-8 Additional information for APPLE-SA-2021-09-13-4 Security Update 2021-005 Catalina seclists.org · Mailing List http://seclists.org/fulldisclosure/2021/Sep/40
20210921 APPLE-SA-2021-09-20-6 Additional information for APPLE-SA-2021-09-13-1 iOS 14.8 and iPadOS 14.8 seclists.org · Mailing List http://seclists.org/fulldisclosure/2021/Sep/38
20210921 APPLE-SA-2021-09-20-7 Additional information for APPLE-SA-2021-09-13-3 macOS Big Sur 11.6 seclists.org · Mailing List http://seclists.org/fulldisclosure/2021/Sep/39
20210924 APPLE-SA-2021-09-23-1 iOS 12.5.5 seclists.org · Mailing List http://seclists.org/fulldisclosure/2021/Sep/50
[oss-security] 20220902 JBIG2 integer overflow fixed in Xpdf 4.04, Poppler 22.09.0 openwall.com · Mailing List http://www.openwall.com/lists/oss-security/2022/09/02/11
support.apple.com/en-us/HT212804 support.apple.com · CVE Record https://support.apple.com/en-us/HT212804
support.apple.com/en-us/HT212805 support.apple.com · CVE Record https://support.apple.com/en-us/HT212805
support.apple.com/en-us/HT212807 support.apple.com · CVE Record https://support.apple.com/en-us/HT212807
support.apple.com/en-us/HT212806 support.apple.com · CVE Record https://support.apple.com/en-us/HT212806
support.apple.com/kb/HT212824 support.apple.com · CVE Record https://support.apple.com/kb/HT212824

Exploitation evidence

Why KEV Intelligence 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

Independent exploitation attestation added to the KEV Intelligence record.

Proof of concept available

GitHub

Recorded 18 Sep 2021

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the KEV Intelligence 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: 0
User-Agents: 0

Raw values available in Pro and Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No KEV Intelligence 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

7.8 High

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

EPSS

76.0%

Weaknesses

Integer Overflow or Wraparound CWE-190

All CVSS Scores

CVSS v3.1 7.8 High

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

CVSS v2.0 6.8 Medium

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

Potential Proof of Concepts

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

jeffssh/CVE-2021-30860

github · Created 2021-12-25 03:00:01 UTC · 96 stars · AI assessment 90%

Collection of materials relating to FORCEDENTRY

Timeline

From disclosure to observed exploitation

25 Dec 2021
Public PoC available

Public proof-of-concept code published
03 Nov 2021
Added to CISA KEV

Listed in the CISA Known Exploited Vulnerabilities catalog
24 Aug 2021
CVE published

Vulnerability disclosed publicly
13 Apr 2021
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-2021-30860

Free JSON includes basic KEV fields

{
  "cve_id": "CVE-2021-30860",
  "confidence": "Confirmed",
  "cvss_score": 7.8,
  "cvss_estimated": false,
  "epss_score": 0.75994,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}

Early warning alerts

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