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No exploitation reportedFix available

CVE-2021-30737

No exploitation reported by the sources we read.

  • Published2021-09-08
  • WeaknessCWE-787

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

A memory corruption issue in the ASN.1 decoder was addressed by removing the vulnerable code. This issue is fixed in tvOS 14.6, Security Update 2021-004 Mojave, iOS 14.6 and iPadOS 14.6, iOS 12.5.4, Security Update 2021-003 Catalina, macOS Big Sur 11.4, watchOS 7.5. Processing a maliciously crafted certificate may lead to arbitrary code execution.

Timeline

dates in UTC
  1. 2021-09-0814:15CVE publishedNVD

Versions per branch

NVD
Apple mac os x
BranchAffectedFixed in
10.14≥ 10.14.0, ≤ 10.14.5no fix published
10.15≥ 10.15, ≤ 10.15.5no fix published
10.14= 10.14.6no fix published
10.15= 10.15.6no fix published
10.15= 10.15.7no fix published
Apple iphone os
BranchAffectedFixed in
14.6≥ 13.0, < 14.614.6
12.5< 12.5.412.5.4
Apple ipados
BranchAffectedFixed in
14.6< 14.614.6

3 more products in the sources.

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

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2021-09-08
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-f7gv-428c-w364

Frequently asked questions

What is CVE-2021-30737?

A memory corruption issue in the ASN.1 decoder was addressed by removing the vulnerable code. This issue is fixed in tvOS 14.6, Security Update 2021-004 Mojave, iOS 14.6 and iPadOS 14.6, iOS 12.5.4, Security Update 2021-003 Catalina, macOS Big Sur 11.4, watchOS 7.5. Processing a maliciously crafted certificate may lead to arbitrary code execution.

Is CVE-2021-30737 actively exploited?

Active exploitation of CVE-2021-30737 has not been confirmed. Its EPSS score was 1.5% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-30737?

CVE-2021-30737 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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Sources for this record