CVE-2021-30773Public exploit

Local code-signing bypass

Published Sep 8, 2021 · Updated Aug 3, 2024

Code-signature validation in Apple iOS before 14.7, tvOS before 14.7, and watchOS before 7.6 allows local users to bypass signing checks. Apple has not published the validation locus or the malformed signature condition that passes the affected check. Exploitation requires execution of a malicious application and defeats code-integrity enforcement; no confidentiality or availability impact is reported.

CVSS severity5.5
Medium
EPSS probability1.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code-signature validation in Apple iOS before 14.7, tvOS before 14.7, and watchOS before 7.6 allows local users to bypass signing checks. Apple has not published the validation locus or the malformed signature condition that passes the affected check. Exploitation requires execution of a malicious application and defeats code-integrity enforcement; no confidentiality or availability impact is reported.

The record

CVE
CVE-2021-30773
Published
Sep 8, 2021
Updated
Aug 3, 2024
Vendor
Apple
Product
iOS
Classifications
T1211
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 8, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <14.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Apple · iOSversion=unspecified <14.7
Apple · tvOSversion=unspecified <14.7
Apple · watchOSversion=unspecified <7.6

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1211Exploitation for Defense Evasion

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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