CVE-2025-31277

Exp

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.

Published: 2025-07-30 Last update: 2026-04-03 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-31277 is rated Critical Active Threat (85.7/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.43%). CISA KEV confirms active exploitation (added 2026-03-20) affecting Apple / Multiple Products. a weakness (CWE-119) Unauthenticated remote administrative access may be possible. EPSS rose +1.18% over the last day, indicating growing attacker interest. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2025-31277

Name: Apple Multiple Products Buffer Overflow Vulnerability · CISA KEV detail

Exploit added: 2026-03-20

Action due: 2026-04-03

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.

Exploit prediction scoring system (EPSS) score for CVE-2025-31277

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.25% 1.43% +1.18%
2 2026-05-25 0.19% 0.25% +0.06%
3 2026-04-01 — 0.19% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-31277

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2025-31277

OS Trackers for CVE-2025-31277

vendor priority summary link
debian end-of-life CVE-2025-31277 end-of-life priority: Debian including 2 source packages (webkit2gtk, wpewebkit), 10 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 7, open 3. https://security-tracker.debian.org/tracker/CVE-2025-31277
redhat high — https://access.redhat.com/security/cve/CVE-2025-31277
suse high CVE-2025-31277 severity important: SUSE including 88 source package names (WebKitGTK-4.0-lang-2.52.0-150400.4.137.3, WebKitGTK-4.0-lang-2.52.1-150600.12.63.1, …), 359 product×package rows across 24 product lines (SUSE Liberty Linux 8, SUSE Liberty Linux 9, … (24 product lines)): Fixed 341, First Fixed 18. https://www.suse.com/security/cve/CVE-2025-31277/
ubuntu high CVE-2025-31277 high priority: Ubuntu including 5 source packages (qtwebkit-opensource-src, qtwebkit-source, webkit2gtk, webkitgtk, wpewebkit), 31 status rows across 7 suites (bionic, focal, jammy, noble, questing, upstream, xenial): ignored 14, DNE 9, needs-triage 4, released 4. https://ubuntu.com/security/CVE-2025-31277

Affected software / configurations for CVE-2025-31277

Vendor Product Version Raw CPE
apple safari < 18.6 cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
apple ipados < 18.6 cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
apple iphone_os < 18.6 cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple macos >= 15.0, < 15.6 cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
apple tvos < 18.6 cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
apple visionos < 2.6 cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:*
apple watchos < 11.6 cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*

References for CVE-2025-31277

URL Tags
https://support.apple.com/en-us/124147 Release Notes Vendor Advisory
https://support.apple.com/en-us/124149 Release Notes Vendor Advisory
https://support.apple.com/en-us/124152 Release Notes Vendor Advisory
https://support.apple.com/en-us/124153 Release Notes Vendor Advisory
https://support.apple.com/en-us/124154 Release Notes Vendor Advisory
https://support.apple.com/en-us/124155 Release Notes Vendor Advisory
http://seclists.org/fulldisclosure/2025/Aug/0 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2025/Jul/30 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2025/Jul/32 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2025/Jul/36 Mailing List Third Party Advisory
https://cloud.google.com/blog/topics/threat-intelligence/darksword-ios-exploit-chain/ Technical Description
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-31277 US Government Resource
cvelogic Threat Intelligence