# CISA adds Apple auth flaw to KEV

Published: 2026-11-04 · Severity: high · Sectors: Government (National)
Canonical: https://vorant.io/reports/54373e67-b08c-5334-bf1f-743a798f320b/cisa-adds-apple-auth-flaw-to-kev
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> CISA added CVE-2024-27834, an Apple improper authentication vulnerability, to its Known Exploited Vulnerabilities catalog due to active exploitation.

Source: cisa.gov — https://www.cisa.gov/news-events/alerts/2026/11/04/cisa-adds-one-known-exploited-vulnerability-catalog

## What to check

- Applies to: The 1 CVE named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation: CISA lists CVE-2024-27834 as exploited in the wild.

CISA has added CVE-2024-27834, described as an Apple Multiple Products Improper Authentication Vulnerability, to its Known Exploited Vulnerabilities (KEV) Catalog based on evidence of active exploitation in the wild. The advisory itself provides no technical detail on the exploitation chain, affected product versions, or threat actors involved, consistent with CISA's standard KEV catalog addition bulletins.

Under Binding Operational Directive (BOD) 26-04, Federal Civilian Executive Branch (FCEB) agencies are required to prioritize remediation of KEV-listed vulnerabilities, particularly those on publicly exposed assets that grant total control post-exploitation, and to check for prior compromise before patching in certain cases. While BOD 26-04 only legally binds FCEB agencies, CISA recommends all organizations using affected Apple products adopt the same risk-based prioritization and remediate this vulnerability promptly.

Defenders should identify any Apple products affected by CVE-2024-27834 in their environment, apply available patches or updates, and review authentication logs for signs of exploitation given confirmed active use of this flaw by threat actors.

## Mentioned in this report

- Vulnerabilities: CVE-2024-27834 (KEV)

Source reporting: https://www.cisa.gov/news-events/alerts/2026/11/04/cisa-adds-one-known-exploited-vulnerability-catalog

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