Buffer overflow in Apple iOS And Ipados
CVE-2025-31277
The issue was addressed with improved memory handling. This issue is fixed in Safari 18.6, iOS 18.6 and iPadOS 18.6, macOS Sequoia 15.6, tvOS 18.6, visionOS 2.6, watchOS 11.6. Processing maliciously crafted web content may lead to memory corruption.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.016 (75.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 75.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.016 · change: +0.001
Affected products
- Apple iOS And Ipados — versions 0
- Apple Ipados
- Apple Iphone OS
- Apple macOS — versions 0
- Apple Safari — versions 0
- Apple tvOS — versions 0
- Apple Visionos — versions 0
- Apple watchOS — versions 0
- Webkitgtk
- Wpewebkit Wpe Webkit
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Public proof-of-concept exploits
References
- support.apple.com/en-us/124147 (Release Notes, Vendor Advisory)
- support.apple.com/en-us/124149 (Release Notes, Vendor Advisory)
- support.apple.com/en-us/124152 (Release Notes, Vendor Advisory)
- support.apple.com/en-us/124153 (Release Notes, Vendor Advisory)
- support.apple.com/en-us/124154 (Release Notes, Vendor Advisory)
- support.apple.com/en-us/124155 (Release Notes, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-31277?
- CVE-2025-31277 is a high-severity vulnerability in Apple iOS And Ipados, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2025-07-30.
- How severe is CVE-2025-31277?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2025-31277 known to be exploited?
- Yes. CVE-2025-31277 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-03-20), indicating it is being actively exploited. 1 public proof-of-concept repositories are indexed.