Home › Exploited CVEs › CVE-2023-41991
CVE-2023-41991: Apple Multiple Products Improper Certificate Validation Vulnerability
Apple Multiple Products · in CISA KEV since 2023-09-25
Need it fresh, filtered or via API?These pages are a free snapshot, last updated 2026-10-01.
- Kevscope API $5 pack $5 for 2,000 calls, never expires: patch-priority verdicts for up to 20 CVEs per call from today's KEV, EPSS, CVSS and SSVC data, by REST API or MCP. Pay by card, your API key is on screen the moment checkout ends; no account, no subscription.
- Exploited Vulnerabilities Brief: Weekly Edition $9/month: a fresh KEV + EPSS brief every Monday (PDF + CSVs): new exploited CVEs, what to patch first, upcoming CISA deadlines.
- Kevscope CVE priority API 200 free calls a day, $5 for 2,000 calls (no expiry), or $19/month for 10,000: returns a patch-priority verdict for up to 20 CVEs per call with the evidence (KEV, EPSS, CVSS, CISA SSVC), most urgent first, by API or MCP.
- Exploited Vulnerabilities Brief (September 2026) $15: this month's KEV additions ranked by EPSS, ransomware use and due date, as a one-off report.
- All Three Monday Briefs: Rates, Recalls + Exploited Vulns $25/month: all three weekly briefs (Treasury/BLS rates & macro, NHTSA recalls, CISA KEV/EPSS) for $25/month instead of $37.
2023-09-25added to KEV
2023-10-16federal remediation due date
13.38%EPSS exploit probability (30 days) 96.3th percentile
5.5 MEDIUMCVSS 3.1
Unknownknown ransomware use
4days from NVD publication to KEV
What it is
Apple iOS, iPadOS, macOS, and watchOS contain an improper certificate validation vulnerability that can allow a malicious app to bypass signature validation.
Required action (CISA)
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
| CWE | CWE-295 |
|---|---|
| CVSS vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N |
| NVD published | 2023-09-21 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2023-41991.json · all KEV CVEs
Kevscope: daily CISA KEV + EPSS datasetThe whole KEV catalog joined with daily EPSS and CVSS scores as CSV/Parquet, refreshed daily. Free to download.
Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.
Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.