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ExploitedIn CISA KEVFix available

CVE-2021-30860

Exploitation confirmed. First attested on 2021-11-03 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2021-08-24
  • Fixed in14.8 · 12.5.5
  • WeaknessCWE-190

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2021-08-2419:15CVE publishedNVD
  2. 2021-11-03Added to the CISA KEV catalogCISA KEV
  3. 2021-11-03Listed as exploited by GCVEGCVE
  4. 2021-11-03Exploitation first reportedCISA KEV
  5. 2024-02-0518:40SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-30860?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-30860?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Apple iphone os
BranchAffectedFixed in
14.8≥ 13.0, < 14.814.8
12.5< 12.5.512.5.5
Apple mac os x
BranchAffectedFixed in
10.15≥ 10.15, < 10.15.710.15.7
10.15= 10.15.7no fix published
Apple ipados
BranchAffectedFixed in
14.8< 14.814.8

4 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA4 products

As apple, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Apple macOS
    Affected
    • < 11.6fixed in 11.6custom
  • Apple macOS
    Affected
    • < 2021-005fixed in 2021-005custom
  • Apple watchOS
    Affected
    • < 7.6fixed in 7.6custom
  • Apple iOS
    Affected
    • < 14.8fixed in 14.8custom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2022-09-29

Fix

  1. Update Apple iphone os to 14.8 · 12.5.5
  2. CISA’s required action: Apply updates per vendor instructions.due 2021-11-17

Advisories and patches

Detection

read 2026-11-02 22:42 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
2 repositories, unverifiedLevilutz/CVE-2021-30860jeffssh/CVE-2021-30860
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2021-11-03
Patch Due Date
2021-11-17
Ransomware Use
Unknown
Required Action
Apply updates per vendor instructions.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2021-08-24
Last Modified
2026-06-17
NVD status
Analyzed

Frequently asked questions

What is CVE-2021-30860?

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.

Is CVE-2021-30860 actively exploited?

Yes. CVE-2021-30860 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2021-11-17.

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

CVE-2021-30860 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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Sources for this record