Several Apple products: attackers can get in without a password
OFFICIAL NAME: Apple Multiple Products Improper Authentication Vulnerability
WHAT IT IS · COMPUTERS, PHONES AND BROWSERSIt runs on staff computers, phones or browsers.
DO THIS FIRSTInstall the latest updates on every device, and turn on automatic updates. Not sure if you use it? Send this page to your IT provider or security lead and ask.
TECHNICAL SUMMARY Apple iOS, iPadOS, macOS, Safari, tvOS and watchOS 10.5 contain an improper authentication vulnerability which could allow an attacker with arbitrary read and write capability to bypass pointer authentication.
WHY THIS VERDICT Attacks are confirmed, but the vulnerability is more than a year old and we see no ransomware use, public attack tools, internet-facing product, critical severity or high prediction score. Check whether it applies to you.
WHY IT RANKS HERE Exploitation is confirmed by an authoritative source. The confirmation is 7 days old. 6 products are affected.
- HIGHEST CONFIRMED RUNG
- EXPLOITED
- CISA KEV
- LISTED
- EXPLOIT CODE
- NONE KNOWN
How far has it climbed?
01 TALK
■ CONFIRMEDNEWEST EVIDENCE · 3 INDEPENDENT SOURCESCVE-2024-27834 discussed publicly (CIRCL sighting). CVE-2024-27834 discussed publicly (CIRCL sighting).
- SRC: CIRCL Vulnerability-Lookup sightings: CVE-2024-27834 discussed publicly (CIRCL sighting) · NOV 9
- SRC: Security Affairs: U.S. CISA adds Apple flaw to its Known Exploited Vulnerabilities catalog · NOV 5
- SRC: The Hacker News: Hackers Exploit Patched Apple Flaw to Deliver Info-Stealing Malware, CISA Says · NOV 4
02 EXPOSED
□ NOT TRACKED YETNO SOURCE FOR THIS STEP YETWe have no source that counts exposed systems yet. Internet scan data needs a partnership we do not have. No evidence here does not mean nothing is exposed.
03 TRIED
■ CONFIRMEDNEWEST EVIDENCE · 3 INDEPENDENT SOURCESAttacks that worked are confirmed (step 4), so attempts count as confirmed too.
- SRC: CIRCL Vulnerability-Lookup sightings: Exploitation of CVE-2024-27834 reported (CIRCL sighting) · NOV 4
- SRC: CISA Known Exploited Vulnerabilities: Apple Multiple Products Improper Authentication Vulnerability · NOV 3
- SRC: CVE List V5 and CISA Vulnrichment: CISA Vulnrichment marks CVE-2024-27834 as actively exploited · MAY 13
04 EXPLOITED
■ CONFIRMEDNEWEST EVIDENCE · 3 INDEPENDENT SOURCESExploitation of CVE-2024-27834 reported (CIRCL sighting). Apple iOS, iPadOS, macOS, Safari, tvOS and watchOS 10.5 contain an improper authentication vulnerability which could allow an attacker with arbitrary read and write capability to bypass pointer authentication.
- SRC: CIRCL Vulnerability-Lookup sightings: Exploitation of CVE-2024-27834 reported (CIRCL sighting) · NOV 4
- SRC: CISA Known Exploited Vulnerabilities: Apple Multiple Products Improper Authentication Vulnerability · NOV 3
- SRC: CVE List V5 and CISA Vulnrichment: CISA Vulnrichment marks CVE-2024-27834 as actively exploited · MAY 13
05 DAMAGE
□ NOT TRACKED YETNO SOURCE FOR THIS STEP YETBreach notices and filings rarely name the flaw that was used, so we cannot link them to this event yet. No evidence here does not mean no harm.
When each thing happened
- DISCLOSED
- EXPLOIT CODE PUBLICNOT YET
- FIRST ATTACK REPORT
- CISA KEV LISTING
- US FEDERAL DEADLINE
THE FIX
CISA's instruction: apply the vendor's fix, or stop using the product if no fix exists. CISA set Nov 18, 2026 as the deadline for US federal agencies. It is a US government deadline; use it as a guide.
Questions to ask this week
- Do we run Several Apple products? If yes, is it patched or cut off from the internet?
- Who owns fixing it, and by what date?
- Have we checked for signs of attack since the first report, not just since the patch?
How it unfolded
- Attack activity. MAY 13, 2024CISA Vulnrichment marks CVE-2024-27834 as actively exploited
- Attack activity. NOV 3, 2026Apple Multiple Products Improper Authentication Vulnerability
- NOV 4, 2026CVE-2024-27834 discussed publicly (CIRCL sighting) (46 reports, latest NOV 9)
- NOV 4, 2026Hackers Exploit Patched Apple Flaw to Deliver Info-Stealing Malware, CISA Says
- Attack activity. NOV 4, 2026Exploitation of CVE-2024-27834 reported (CIRCL sighting)
- NOV 5, 2026U.S. CISA adds Apple flaw to its Known Exploited Vulnerabilities catalog
SOURCES
- [1] CIRCL Vulnerability-Lookup sightings: CVE-2024-27834 discussed publicly (CIRCL sighting), NOV 9
- [2] Security Affairs: U.S. CISA adds Apple flaw to its Known Exploited Vulnerabilities catalog, NOV 5
- [3] CIRCL Vulnerability-Lookup sightings: Exploitation of CVE-2024-27834 reported (CIRCL sighting), NOV 4
- [4] The Hacker News: Hackers Exploit Patched Apple Flaw to Deliver Info-Stealing Malware, CISA Says, NOV 4
- [5] CISA Known Exploited Vulnerabilities: Apple Multiple Products Improper Authentication Vulnerability, NOV 3
- [6] CVE List V5 and CISA Vulnrichment: CISA Vulnrichment marks CVE-2024-27834 as actively exploited, MAY 13
- [7] CIRCL Vulnerability-Lookup sightings: 45 more reports