What is the CVSS score of CVE-2021-30860?

CVE-2021-30860 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 76.0%.

Is CVE-2021-30860 being actively exploited?

Yes, CVE-2021-30860 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, confirming active in-the-wild exploitation. Immediate patching is required.

Ipados CVE-2021-30860

HIGH

Integer Overflow or Wraparound (CWE-190)

2021-08-24 product-security@apple.com

RCE Integer Overflow Apple macOS Ipados Iphone Os Poppler Watchos Mac Os X Xpdf Xpdfreader Freedesktop

7.8

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-190 ASVS 5.0 V15 - Secure Coding and Architecture Integer overflow checks MITRE ATT&CK 1 technique across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 7.8 (HIGH). Attack characteristics: local attack vector, low complexity, no privileges required, user interaction required.
Exploit ScenarioDerived	A local attacker with access to the system could cause unexpected behavior through arithmetic overflow. No authentication is required to exploit this vulnerability.

This Week Schedule remediation this week. Why: HIGH severity + EPSS > 10%.

Exploited in the wild (CISA KEV) No patch listed yet 76.0% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAI

An integer overflow was addressed with improved input validation. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate arithmetic operations, use safe integer libraries, check bounds before allocation.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Integer Overflow (CWE-190), which allows attackers to cause unexpected behavior through arithmetic overflow. 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. Affected products include: Apple Ipados, Apple Iphone Os, Apple Mac Os X, Apple Macos, Apple Watchos.

Know when Ipados gets its next vulnerability

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

Severity by source

NVD PRIMARY 7.8 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Added to CISA KEV

Jul 14, 2026 - 04:22 CISA

CVE Published

Aug 24, 2021 - 19:15 nvd

HIGH 7.8

DescriptionNVD

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.

Threat Intelligence Overview

EPSS Score

76.0%

Top 1% exploitable

Data Quality

2 sources

Confidence: Low

NVD

CVE.org

CISA KEV

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV Yes

Public POC No

EPSS 76.0%

Patch available No

Active threat Yes

Deciding rule

HIGH severity + EPSS > 10%

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Out-of-Cycle

Exploitation· derived

Active

System Exposure· derived

Small

Automatable· derived

Human Impact· derived

High

Priority Score

165

Low Medium High Critical

KEV: +50

EPSS: +76

CVSS: +39

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Integer Overflow MEDIUM

Integer overflow occurs when an arithmetic operation produces a result that exceeds the maximum value a given integer type can store.

Remote Code Execution CRITICAL

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

Affected Products (CPE)NVD

cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*

cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*

cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*

cpe:2.3:o:apple:mac_os_x:10.15.7:-:*:*:*:*:*:*

cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020:*:*:*:*:*:*

cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-001:*:*:*:*:*:*

cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-001:*:*:*:*:*:*

cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-002:*:*:*:*:*:*

cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-003:*:*:*:*:*:*

cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-004:*:*:*:*:*:*

cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*

cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*

cpe:2.3:a:xpdfreader:xpdf:*:*:*:*:*:*:*:*

cpe:2.3:a:freedesktop:poppler:*:*:*:*:*:*:*:*

More in Ipados

View all

CVE-2022-2294 HIGH Act Now

8.8 Jul 28

Heap buffer overflow in WebRTC in Google Chrome prior to 103.0.5060.114 allowed a remote attacker to potentially exploit

CVE-2025-31277 HIGH Act Now POC

8.8 Jul 30

WebKit memory corruption in Safari 18.6 and multiple Apple platforms allows remote code execution when processing malici

CVE-2023-43000 HIGH Act Now POC

8.8 Nov 05

A use-after-free issue was addressed with improved memory management. Rated high severity (CVSS 8.8), this vulnerability

CVE-2023-41974 HIGH Act Now POC

7.8 Jan 10

A use-after-free issue was addressed with improved memory management. Rated high severity (CVSS 7.8), this vulnerability

CVE-2025-43510 HIGH Act Now POC

7.8 Dec 12

Apple kernel lock state checking flaw allows a malicious application to cause unexpected changes in memory shared betwee

CVE-2025-24201 CRITICAL Act Now

10.0 Mar 11

A critical out-of-bounds write in WebKit's rendering engine allows maliciously crafted web content to escape the Web Con

CVE-2025-43520 MEDIUM This Month POC

5.5 Dec 12

Apple kernel memory corruption in multiple operating systems allows a malicious application to cause unexpected system t

CVE-2024-44308 HIGH Act Now

8.8 Nov 20

Arbitrary code execution in Apple Safari, iOS/iPadOS, macOS Sequoia, and visionOS occurs when processing maliciously cra

CVE-2022-37434 CRITICAL Act Now POC

9.8 Aug 05

zlib through 1.2.12 has a heap-based buffer over-read or buffer overflow in inflate in inflate.c via a large gzip header

CVE-2025-14174 HIGH Act Now

8.8

Out-of-bounds write (CWE-787) in QtWebEngine before 6.10.1-r2 on Alpine Linux, and in other Chromium-based engines such

CVE-2025-6558 HIGH Act Now

8.8

Remote code execution in Google Chrome's ANGLE graphics layer allows attackers to compromise systems via crafted HTML pa

CVE-2025-43529 HIGH Act Now

8.8 Dec 17

WebKit arbitrary code execution via use-after-free memory corruption affects Safari 26.2, iOS/iPadOS 18.7.3 through 26.2

Same weakness CWE-190 – Integer Overflow or Wraparound

View all

CVE-2013-2729 CRITICAL POC

9.8

CVE-2015-8651 HIGH

8.8

CVE-2012-5054 HIGH POC

8.8

CVE-2014-0569 CRITICAL POC

9.3

CVE-2023-21716 CRITICAL POC

9.8

CVE-2017-3599 HIGH POC

7.5

CVE-2017-7529 HIGH

7.5

CVE-2016-1010 HIGH

8.8

Same technique RCE

View all

CVE-2021-44228 CRITICAL POC

10.0

CVE-2017-7269 CRITICAL POC

9.8

CVE-2022-47966 CRITICAL POC

9.8

CVE-2012-4681 CRITICAL POC

9.8

CVE-2023-3519 CRITICAL POC

9.8

CVE-2015-5119 CRITICAL POC

9.8

CVE-2016-4117 CRITICAL POC

9.8

CVE-2015-3113 CRITICAL POC

9.8

References

Advisories & patches

ADVISORY https://support.apple.com/en-us/HT212804 ADVISORY https://support.apple.com/en-us/HT212805 ADVISORY https://support.apple.com/en-us/HT212806 ADVISORY https://support.apple.com/en-us/HT212807 ADVISORY https://support.apple.com/kb/HT212824 REF http://seclists.org/fulldisclosure/2021/Sep/25 REF http://seclists.org/fulldisclosure/2021/Sep/26 REF http://seclists.org/fulldisclosure/2021/Sep/27 REF http://seclists.org/fulldisclosure/2021/Sep/28 REF http://seclists.org/fulldisclosure/2021/Sep/38 REF http://seclists.org/fulldisclosure/2021/Sep/39 REF http://seclists.org/fulldisclosure/2021/Sep/40 REF http://seclists.org/fulldisclosure/2021/Sep/50 REF http://www.openwall.com/lists/oss-security/2022/09/02/11 REF https://security.gentoo.org/glsa/202209-21 REF https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30860

Search Externally

GitHub PoC

Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC

Back