CVE-2021-30860

Exp

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.

Published: 2021-08-24 Last update: 2025-10-27 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-30860 is rated Critical Active Threat (90.4/100): CVSS High severity, with high exploitation likelihood (EPSS 71.97%, 99th percentile). CISA KEV confirms active exploitation (added 2021-11-03) affecting Apple / Multiple Products. a weakness (CWE-190) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2021-30860

Name: Apple Multiple Products Integer Overflow Vulnerability · CISA KEV detail

Exploit added: 2021-11-03

Action due: 2021-11-17

Required action: Apply updates per vendor instructions.

Exploit prediction scoring system (EPSS) score for CVE-2021-30860

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-24 72.37% 71.97% -0.40%
2 2026-05-22 70.64% 72.37% +1.73%
3 2026-04-24 — 70.64% —

Full EPSS history (36 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-30860

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2021-30860

OS Trackers for CVE-2021-30860

vendor priority summary link
gentoo high CVE-2021-30860: 1 GLSA(s) (202209-21), 1 atom(s) (app-text/poppler); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2021-30860
suse high CVE-2021-30860 severity important: SUSE including 22 source package names (libpoppler-cpp0, libpoppler-cpp0-32bit, …), 361 product×package rows across 62 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 6, … (62 product lines)): Known Not Affected 358, Fixed 3. https://www.suse.com/security/cve/CVE-2021-30860/

Affected software / configurations for CVE-2021-30860

Vendor Product Version Raw CPE
apple ipados < 14.8 cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
apple iphone_os < 12.5.5 cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple iphone_os >= 13.0, < 14.8 cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple mac_os_x >= 10.15, < 10.15.7 cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
apple mac_os_x 10.15.7 cpe:2.3:o:apple:mac_os_x:10.15.7:-:*:*:*:*:*:*
apple mac_os_x 10.15.7 cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020:*:*:*:*:*:*
apple mac_os_x 10.15.7 cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-001:*:*:*:*:*:*
apple mac_os_x 10.15.7 cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-001:*:*:*:*:*:*
apple mac_os_x 10.15.7 cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-002:*:*:*:*:*:*
apple mac_os_x 10.15.7 cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-003:*:*:*:*:*:*
apple mac_os_x 10.15.7 cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-004:*:*:*:*:*:*
apple macos < 11.6 cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
apple watchos < 7.6.2 cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
xpdfreader xpdf < 4.04 cpe:2.3:a:xpdfreader:xpdf:*:*:*:*:*:*:*:*
freedesktop poppler < 22.09.0 cpe:2.3:a:freedesktop:poppler:*:*:*:*:*:*:*:*

References for CVE-2021-30860

URL Tags
http://seclists.org/fulldisclosure/2021/Sep/25 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/26 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/27 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/28 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/38 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/39 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/40 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/50 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/09/02/11 Mailing List
https://security.gentoo.org/glsa/202209-21 Third Party Advisory
https://support.apple.com/en-us/HT212804 Vendor Advisory
https://support.apple.com/en-us/HT212805 Vendor Advisory
https://support.apple.com/en-us/HT212806 Vendor Advisory
https://support.apple.com/en-us/HT212807 Vendor Advisory
https://support.apple.com/kb/HT212824 Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30860 US Government Resource
cvelogic Threat Intelligence