DaystoPatch

AppleExploited incident

Apple Multiple Products Buffer Overflow Vulnerability

CVE-2025-31277High, CVSS 8.8In CISA's Known Exploited Vulnerabilities catalog since 20 Mar 2026

Automated timeline. Not yet checked by a researcher, so it doesn't count toward any grade.

FixedFixed for every supported version on the day it became public.

Response

Silence
same day
First public report to first vendor statementUnverified source
Exposure
same day
First public report to first fix
Follow-through
same day
First public report to a fix for every supported versionUnverified source
  • Vendor silent
  • Vendor statement, no fix
  • Fixed for some versions
  • Fixed when disclosed
  • Date only, no time of day

Timeline and evidence

Open a moment to see its source and archived quote.

  1. First public report

    CVE.org record CVE-2025-31277ClaimedQuote verified

    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

    CVE record published.

    Recorded time
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    sha256:43fe8c953df80725…
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    5 more sources for this moment
    Apple advisory 124147/CVE-2025-31277ClaimedQuote not found in archive29 Jul 2025

    iOS 18.6 and iPadOS 18.6: WebKit. Impact: Processing maliciously crafted web content may lead to memory corruption Description: The issue was addressed with improved memory handling.

    The vendor's own disclosure.

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    Mastodon postClaimedQuote not checked yet18 Mar 2026, 16:58 UTC

    The Proliferation of DarkSword: iOS Exploit Chain Adopted by Multiple Threat Actors # DarkSword # UNC6353 # UNC6748 # GHOSTKNIFE # PARSDefense # GHOSTSABER # CVE_2025_31277 # CVE_2026_20700 #

    Earliest third-party post we hold.

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    Mastodon post social
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    Hacker NewsClaimedQuote not checked yet19 Mar 2026, 02:37 UTC

    Also of note, the exploit relied on: - CVE-2025-31277 or CVE-2025-43529 - CVE-2026-20700 - CVE-2025-14714 - CVE-2025-43510 - CVE-2025-43520 Any single of these patched and the exploit was not functional anymore. After

    Earliest third-party post we hold. An independent author on another platform posted within 48 hours. Used for unreviewed incidents only, never graded.

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    Hacker News hn
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    Bluesky postClaimedQuote not checked yet19 Mar 2026, 21:02 UTC

    CVE-2025-31277 has confirmed exploit code according to the following sources: vulncheck kev.

    Earliest third-party post we hold. An independent author on another platform posted within 48 hours. Used for unreviewed incidents only, never graded.

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    Bluesky post social
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    CISA KEV (CVE-2025-31277)ClaimedQuote verified20 Mar 2026

    Apple Multiple Products Buffer Overflow Vulnerability

    Added to CISA's KEV catalog on 2026-03-20.

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  2. Vendor statement

    date onlysame dayUnverified: quote not found in the archived copy

    Apple advisory 124147/CVE-2025-31277ClaimedQuote not found in archive

    iOS 18.6 and iPadOS 18.6: WebKit. Impact: Processing maliciously crafted web content may lead to memory corruption Description: The issue was addressed with improved memory handling.

    Recorded time
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    Not found in the archived copy. Treat with caution.
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    sha256:9db2afdc3c8c66a8…
    Used in metrics
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    5 more sources for this moment
    Apple advisory 124149/CVE-2025-31277ClaimedQuote verified29 Jul 2025

    Released July 29, 2025

    From the advisory's revision history.

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    sha256:516fa0215ecae0a2…
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    Apple advisory 124153/CVE-2025-31277ClaimedQuote verified29 Jul 2025

    Released July 29, 2025

    From the advisory's revision history.

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    sha256:248fe626dc28c909…
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    Apple advisory 124154/CVE-2025-31277ClaimedQuote verified29 Jul 2025

    Released July 29, 2025

    From the advisory's revision history.

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    sha256:16ec8ef75b693a4e…
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    Apple advisory 124155/CVE-2025-31277ClaimedQuote verified29 Jul 2025

    Released July 29, 2025

    From the advisory's revision history.

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    Claimed. The date the source gives.
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    Found in the archived copy
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    sha256:9bb7d2110c69011c…
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    Apple advisory 124152/CVE-2025-31277ClaimedQuote verified30 Jul 2025

    Released July 30, 2025

    From the advisory's revision history.

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  3. First workaround

    No official mitigation found yet.

  4. First fix

    date onlysame day

    Apple advisory 124147/CVE-2025-31277ClaimedQuote verified

    Released July 29, 2025

    fixed in iOS 18.6 and iPadOS 18.6; one candidate per OS branch

    Recorded time
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    Claimed. The date the source gives.
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    Found in the archived copy
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    sha256:9db2afdc3c8c66a8…
    Used in metrics
    Yes
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    5 more sources for this moment
    Apple advisory 124149/CVE-2025-31277ClaimedQuote verified29 Jul 2025

    Released July 29, 2025

    fixed in macOS Sequoia 15.6; one candidate per OS branch

    Recorded time
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    Claimed. The date the source gives.
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    Found in the archived copy
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    Apple advisory 124153/CVE-2025-31277ClaimedQuote verified29 Jul 2025

    Released July 29, 2025

    fixed in tvOS 18.6; one candidate per OS branch

    Recorded time
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    Claimed. The date the source gives.
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    Found in the archived copy
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    sha256:248fe626dc28c909…
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    Apple advisory 124154/CVE-2025-31277ClaimedQuote verified29 Jul 2025

    Released July 29, 2025

    fixed in visionOS 2.6; one candidate per OS branch

    Recorded time
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    Claimed. The date the source gives.
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    Found in the archived copy
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    sha256:16ec8ef75b693a4e…
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    Apple advisory 124155/CVE-2025-31277ClaimedQuote verified29 Jul 2025

    Released July 29, 2025

    fixed in watchOS 11.6; one candidate per OS branch

    Recorded time
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    Date only (no time of day is shown)
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    Claimed. The date the source gives.
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    Found in the archived copy
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    sha256:9bb7d2110c69011c…
    Used in metrics
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    Apple advisory 124152/CVE-2025-31277ClaimedQuote verified30 Jul 2025

    Released July 30, 2025

    fixed in Safari 18.6; one candidate per OS branch

    Recorded time
    Precision
    Date only (no time of day is shown)
    Origin
    Claimed. The date the source gives.
    Quote check
    Found in the archived copy
    Snapshot
    sha256:a4785b7f4edde81e…
    Used in metrics
    No, kept for the record
    Dispute this timestamp

  5. Fixed for all versions

    date onlysame dayUnverified: derived by rule, not read from a source

    Apple advisory 124147/CVE-2025-31277Inferred

    iOS 18.6 and iPadOS 18.6: WebKit. Impact: Processing maliciously crafted web content may lead to memory corruption Description: The issue was addressed with improved memory handling.

    Patch-day rule: Apple ships fixes in the advisory that discloses a bug, and this advisory states that fixed versions exist. So the vendor statement, first fix and fix for all versions all take the advisory's publication time.

    Recorded time
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    Inferred. Derived by a documented rule.
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    Not found in the archived copy. Treat with caution.
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    sha256:9db2afdc3c8c66a8…
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    Yes
    Dispute this timestamp

Send this to your boss

No brief for this incident yet. We write one for every open incident and every critical bug exploited before a fix.

Affected products

  • Multiple Products
  • Safari 18.6
  • iOS 18.6 and iPadOS 18.6
  • macOS Sequoia 15.6
  • watchOS 11.6
  • tvOS 18.6
  • visionOS 2.6

Related

Apple report card