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.
The record classifies CVE-2021-30860 under weakness class CWE-190. Its CVSS v3 base vector states that the flaw requires local access to the host, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality, integrity, availability. 3 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 1896 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 7.8 — HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - EPSS (FIRST)
- 75.9% probability of exploitation in the next 30 days, higher than 99.4% of all scored CVEs
- CISA KEV
- Listed since 2021-11-03, federal remediation deadline 2021-11-17
- Threadlinqs priority
- 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
- Published
- 2021-08-24, last modified 2025-10-21
Is CVE-2021-30860 being exploited?
CISA added CVE-2021-30860 to the Known Exploited Vulnerabilities catalog on 2021-11-03, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2021-11-17 under BOD 22-01. Weaponised exploit code for CVE-2021-30860 is publicly available. 3 public proof-of-concept repositories are tracked for this identifier. It currently carries a trending score of 43 in the Threadlinqs vulnerability feed.
- jeffssh/CVE-2021-30860 (github)
- Levilutz/CVE-2021-30860 (github)
- trickest/cve (trickest)
Affected products and versions
- Apple: macOS, watchOS, iOS
How to fix CVE-2021-30860
Vendor advisory: https://support.apple.com/en-us/HT212804. Because CVE-2021-30860 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2021-11-17. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2021-30860
5 tracked threats in the Threadlinqs corpus reference CVE-2021-30860, either in the campaign’s CVE list or as an indicator on the campaign record.
- Apple Issues Mercenary Spyware Threat Notifications to Users in 110 Countries — HIGH · 2026-08-16
- Apple Expands On-Device Lock Screen Alerts for Mercenary Spyware Targets — HIGH · 2026-08-14
- NSO Group Co-Founder Shalev Hulio Held Israeli Diplomatic Passport in Panama, Raising State-Ties Questions for Pegasus Spyware Vendor — INFORMATIONAL · 2026-07-28
- Pegasus Mercenary Spyware Used for State Surveillance of Azerbaijani Journalists, Activists, and Human Rights Defenders (NSO Group) — HIGH · 2026-06-10
- NSO Group Pegasus Spyware — WhatsApp Spearphishing Campaign Alleged in Meta Contempt Complaint (June 2026) — HIGH · 2026-06-09
Sources
Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV, public proof-of-concept repositories. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.
Vendor advisory and patch
Mailing list and disclosure
- seclists.org — mailing list
- seclists.org — mailing list (27)
- seclists.org — mailing list (25)
- seclists.org — mailing list (26)
- seclists.org — mailing list (40)
Other references
- support.apple.com
- support.apple.com (HT212805)
- support.apple.com (HT212807)
- support.apple.com (HT212806)
Showing 11 of 15 recorded references.