CVE-2023-40441: Apple iOS and iPadOS · Processing web content may lead to a denial-of-service
Affects Apple iOS and iPadOSSource CVE Database V5
Not known to be exploited : upgrade to 17 when convenient.
Data as of 26 Oct 2026, 17:16 UTC
Rated Medium by the CNA (apple) · No CVSS score from NVD or the CNA
- EPSS
- 1.1% chance of exploitation in 30 days – higher than 65% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 17
Exploitation evidence
Disclosed: evidence found.
CVE published 26 Sep 2023
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade Apple iOS and iPadOS to 17.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Apple iOS and iPadOS | Affected
| Fixed in
|
AI-suggested
A fix is available in iOS 17 and iPadOS 17. Users and administrators should update affected devices to these versions or later to remediate the vulnerability.
Description
CVE-2023-40441 is a denial-of-service vulnerability in Apple iOS and iPadOS caused by a resource exhaustion issue when processing web content. The issue was addressed by improved input validation and fixed in iOS 17 and iPadOS 17. Versions prior to 17 are affected.
References
- support.apple.com/en-us/HT213938 (opens in a new tab)
- support.apple.com/en-us/HT213940 (opens in a new tab)
- seclists.org/fulldisclosure/2023/Oct/8 (opens in a new tab)
- seclists.org/fulldisclosure/2023/Oct/3 (opens in a new tab)
- support.apple.com/kb/HT213940 (opens in a new tab)
- support.apple.com/kb/HT213938 (opens in a new tab)