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CVE-2023-41991: Apple Multiple Products Improper Certificate Validation Vulnerability

criticalknown exploitedpublic exploitCVE-2023-41991
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Apple iOS, iPadOS, macOS, and watchOS contain an improper certificate validation vulnerability that can allow a malicious app to bypass signature validation.

CSIRTS triage

vendor: AppleOther
What
An improper certificate validation vulnerability allows a malicious app to bypass signature validation.
Who is affected
Users of Apple iOS, iPadOS, macOS, and watchOS.
Urgency
Remediation is urgent due to active exploitation and critical severity.
Action
Update to the latest versions of affected Apple products.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2023-09-25
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2023-41991

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2023-41991coverage & exploitation statusNVD · CVE.org

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