VDB-324231 · CVE-2025-43342 · Nessus 265819

Apple watchOS Web denial of service

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.1	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Apple watchOS. It has been classified as problematic. The affected element is an unknown function of the component Web Handler. Performing a manipulation results in denial of service. This vulnerability is identified as CVE-2025-43342. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Apple watchOS (unknown version). It has been classified as problematic. This affects an unknown code block of the component Web Handler. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

A correctness issue was addressed with improved checks. This issue is fixed in Safari 26, tvOS 26, watchOS 26, iOS 26 and iPadOS 26, visionOS 26, iOS 18.7 and iPadOS 18.7. Processing maliciously crafted web content may lead to an unexpected process crash.

It is possible to read the advisory at support.apple.com. This vulnerability is uniquely identified as CVE-2025-43342 since 04/16/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 265819 (Fedora 42 : webkitgtk (2025-fcc043d407)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (265819) and CERT Bund (WID-SEC-2025-2104). Be aware that VulDB is the high quality source for vulnerability data.

Affected

Debian Linux
Amazon Linux 2
Red Hat Enterprise Linux
Ubuntu Linux
SUSE Linux
Oracle Linux
IGEL OS
SUSE openSUSE
RESF Rocky Linux
Open Source WebKitGTK

Productinfo

Type

Smartwatch Operating System

Vendor

Apple

Name

watchOS

License

commercial

Website

Vendor: https://www.apple.com/

CPE 2.3info

🔒

CPE 2.2info

🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 265819
Nessus Name: Fedora 42 : webkitgtk (2025-fcc043d407)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/16/2025 CVE reserved
09/16/2025 +153 days Advisory disclosed
09/16/2025 +0 days VulDB entry created
01/25/2026 +131 days VulDB entry last update

Sourcesinfo

Vendor: apple.com

Advisory: support.apple.com
Status: Confirmed

CVE: CVE-2025-43342 (🔒)
GCVE (CVE): GCVE-0-2025-43342
GCVE (VulDB): GCVE-100-324231
CERT Bund: WID-SEC-2025-2104 - WebKitGTK: Mehrere Schwachstellen

Entryinfo

Created: 09/16/2025 07:47
Updated: 01/25/2026 11:20
Changes: 09/16/2025 07:47 (54), 09/25/2025 17:32 (2), 10/06/2025 18:23 (7), 10/15/2025 23:54 (1), 10/28/2025 16:51 (1), 11/20/2025 19:51 (1), 01/25/2026 11:20 (1)
Complete: 🔍
Cache ID: 216::103