CVE-2024-27834

The issue was addressed with improved checks. This issue is fixed in Safari 17.5, iOS 16.7.8 and iPadOS 16.7.8, iOS 17.5 and iPadOS 17.5, macOS Sonoma 14.5, tvOS 17.5, watchOS 10.5. An attacker with arbitrary read and write capability may be able to bypass Pointer Authentication.

CVSS: 5.5Mediumscored by CISA
Exploited in the wild: Yes, in CISA KEV since 4 Nov 2026CISA deadline for US federal agencies: 18 Nov 2026
EPSS: 1.5%chance of exploitation in the next 30 daystop 26% of scored CVEsFIRST score of 11 Nov 2026
Fix: Patch availablesee the advisories in the references
Published: 14 May 2024analysed here 12 Nov 2026

Do first. Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. (CISA's required action for this KEV entry)

Summary

Triage

Attack surface: Server-side
Exploitable: At runtime
Attack vector: local
Weakness: CWE-287 Improper Authentication

The summary, impact and action text on this page are written by our AI analysis pipeline, or taken from the NVD description when a CVE was imported from NVD. They are not the vendor's wording: check them against the sources. A longer AI executive summary and technical analysis are generated for signed-in accounts on the Max plan.

Affected products

Product	Affected versions	Vendor says fixed in
Apple iOS and iPadOS	< 16.7.8< 17.5Vendor says fixed in: not stated	Not stated by the vendor
Apple macOS	< 14.5Vendor says fixed in: not stated	Not stated by the vendor
Apple Safari	< 17.5Vendor says fixed in: not stated	Not stated by the vendor
Apple tvOS	< 17.5Vendor says fixed in: not stated	Not stated by the vendor
Apple watchOS	< 10.5Vendor says fixed in: not stated	Not stated by the vendor

As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.

Products named in our analysis

apple:safari
apple:ipados
apple:iphone_os
apple:macos
apple:tvos
apple:watchos
webkitgtk:webkitgtk
wpewebkit:wpe_webkit
fedoraproject:fedora

Fix and mitigation

WAF and other mitigations

Can a WAF block it? No. The attack needs local access to the machine, so a WAF is not on its path.

Also consider: patch · add auth middleware

Based on the attack vector (local or physical access). We check Cloudflare, AWS, Google Cloud Armor and Azure; for Akamai, Imperva, Fastly, F5, ask your vendor.

Remediation steps (AI-written)

Step-by-step remediation is generated for accounts on the Max plan, for CVEs that match a technology in their stack. Add this technology to your stack to see the fix checklist.

Exploitation evidence

CISA KEV catalog: Listed since 4 Nov 2026.
CISA due date: 18 Nov 2026, the remediation deadline for US federal agencies
CISA required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Public exploit code: None on record in Exploit-DB, Metasploit, Nuclei templates or PoC-in-GitHub.
CISA SSVC: exploitation active, automatable no, technical impact partialAssessed by CISA 4 Nov 2026 (SSVC 2.0.3). Exploitation is none, poc (public proof of concept) or active.

Timeline

14 May 2024Published
4 Nov 2026Added to CISA KEV (exploited in the wild)903 days (about 2 years) later
4 Nov 2026CISA SSVC assessment: exploitation activesame day later
5 Nov 2026CVE record last updated1 day later
12 Nov 2026Analysed by vulneraibility.com7 days later
18 Nov 2026CISA remediation due date (US federal agencies)6 days later

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Metric	Value	What it means
Attack vector	LocalLocal access required (shell, logged-in user).	Local access required (shell, logged-in user).
Attack complexity	LowRepeatable attack, no special conditions.	Repeatable attack, no special conditions.
Privileges required	LowThe attacker needs basic user privileges.	The attacker needs basic user privileges.
User interaction	NoneNo victim action needed.	No victim action needed.
Scope	UnchangedImpact stays within the vulnerable component.	Impact stays within the vulnerable component.
Confidentiality	NoneNo data disclosure.	No data disclosure.
Integrity	HighComplete modification possible.	Complete modification possible.
Availability	NoneThe service stays up.	The service stays up.

Common questions

Is CVE-2024-27834 being exploited?

Yes. CVE-2024-27834 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.

How severe is CVE-2024-27834?

CVE-2024-27834 is rated Medium with a CVSS score of 5.5. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.

Is there a patch for CVE-2024-27834?

Yes. A fix has been recorded for CVE-2024-27834. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.

What does CVE-2024-27834 affect?

CVE-2024-27834 affects apple:safari, apple:ipados, apple:iphone_os, apple:macos, and 5 further products or versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.

Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.

References

NVD CVE.org CVE Details Source

25 references in the CVE record, grouped by the tags the record gives them.

Advisories (1)

sekoia.com /blog/poisoned-source-apt29-watering-holes-targets-mobile-devices-with-n-day-exp

Where the data on this page comes from

CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
NVD: CVSS and CPE data
CISA KEV catalog: exploitation, date added, due date
CISA Vulnrichment (ADP): SSVC decision points
FIRST EPSS: exploit probability and percentile

Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.

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