DaystoPatch

IvantiExploited incident

Ivanti Connect Secure stack overflow exploited by China-nexus actor (fixed in Feb 2025, before public disclosure)

CVE-2025-22457Critical, CVSS 9.0In CISA's Known Exploited Vulnerabilities catalog since 4 Apr 2025

  • Exploited after a fix existed
  • Known ransomware use
FixedA fix existed when the bug went public. No evidence yet of when every version was fixed.

Response

Silence
0h
First public report to first vendor statement
Exposure
same day
First public report to first fix
Follow-through
not dated
First public report to a fix for every supported version
  • 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 record CVE-2025-22457 (CNA: Ivanti)CuratedQuote verified

    "datePublished":"2025-04-03T15:20:23.628Z"

    First public signal: Ivanti's disclosure, published together with Mandiant's report. Mandiant says exploitation began in mid-March 2025, which was not public until 2025-04-03.

    Recorded time
    Precision
    To the minute
    Origin
    Curated. Found by a researcher, with a verbatim quote and link.
    Quote check
    Found in the archived copy
    Snapshot
    sha256:6f3b39522b0dc16a…
    Used in metrics
    Yes
    Dispute this timestamp
    5 more sources for this moment
    Mandiant / Google Threat Intelligence blogCuratedQuote verified3 Apr 2025

    The earliest evidence of observed CVE-2025-22457 exploitation occurred in mid-March 2025.

    Post dated April 3, 2025.

    Recorded time
    Precision
    Date only (no time of day is shown)
    Origin
    Curated. Found by a researcher, with a verbatim quote and link.
    Quote check
    Found in the archived copy
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    sha256:0314c3d929b87881…
    Used in metrics
    No, kept for the record
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    Bluesky postClaimedQuote not checked yet3 Apr 2025, 14:22 UTC

    Mandiant (part of Google Cloud) is releasing details on active exploitation of a critical buffer overflow vulnerability, CVE-2025-22457.

    Earliest third-party post we hold.

    Source
    Bluesky post social
    Recorded time
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    To the minute
    Origin
    Claimed. The date the source gives.
    Quote check
    Not checked yet
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    No archived snapshot
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    No, kept for the record
    Dispute this timestamp
    Mastodon postClaimedQuote not checked yet3 Apr 2025, 14:38 UTC

    ah tiens, ce serait donc celle-là la mystérieuse vulnérabilité en exploitation observée par les honeypots ? 👀 ⚠️ Vulnérabilité critique chez Ivanti Connect Secure (CVE-2025-22457) Mandiant signale

    Earliest third-party post we hold.

    Source
    Mastodon post social
    Recorded time
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    To the minute
    Origin
    Claimed. The date the source gives.
    Quote check
    Not checked yet
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    No archived snapshot
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    CVE.org record CVE-2025-22457ClaimedQuote verified3 Apr 2025, 15:20 UTC

    A stack-based buffer overflow in Ivanti Connect Secure before version 22.7R2.6, Ivanti Policy Secure before version 22.7R1.4, and Ivanti ZTA Gateways before version 22.8R2.2 allows a remote

    CVE record published.

    Recorded time
    Precision
    To the minute
    Origin
    Claimed. The date the source gives.
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    Found in the archived copy
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    sha256:6f3b39522b0dc16a…
    Used in metrics
    No, kept for the record
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    CISA KEV (CVE-2025-22457)ClaimedQuote verified4 Apr 2025

    Ivanti Connect Secure, Policy Secure, and ZTA Gateways Stack-Based Buffer Overflow Vulnerability

    Added to CISA's KEV catalog on 2025-04-04.

    Recorded time
    Precision
    Date only (no time of day is shown)
    Origin
    Claimed. The date the source gives.
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    Found in the archived copy
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    sha256:ef8fffede5c47200…
    Used in metrics
    No, kept for the record
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  2. Vendor statement

    at disclosure

    CVE record CVE-2025-22457 (CNA: Ivanti)CuratedQuote verified

    "datePublished":"2025-04-03T15:20:23.628Z"

    Recorded time
    Precision
    To the minute
    Origin
    Curated. Found by a researcher, with a verbatim quote and link.
    Quote check
    Found in the archived copy
    Snapshot
    sha256:6f3b39522b0dc16a…
    Used in metrics
    Yes
    Dispute this timestamp
    1 more source for this moment
    Ivanti blog: Security Update for Pulse Connect Secure, Ivanti Connect Secure, Policy Secure and Neurons for ZTA GatewaysCuratedQuote verified3 Apr 2025

    We are aware of a limited number of customers whose appliances have been exploited and are running Ivanti Connect Secure 22.7R2.5 or earlier or Pulse Connect Secure 9.1x.

    Page shows 'Last updated: April 03, 2025'.

    Recorded time
    Precision
    Date only (no time of day is shown)
    Origin
    Curated. Found by a researcher, with a verbatim quote and link.
    Quote check
    Found in the archived copy
    Snapshot
    sha256:73dc418d3286087b…
    Used in metrics
    No, kept for the record
    Dispute this timestamp

  3. First workaround

    No official mitigation found yet.

  4. First fix

    date onlysame day

    Ivanti blog (April 3, 2025)CuratedQuote verified

    Ivanti Connect Secure 22.7R2.6, released 11 Feb 2025, fully patches the vulnerability.

    Ivanti fixed the bug in 22.7R2.6 as a product bug in February 2025, before it was understood to be exploitable; it was only disclosed as a vulnerability on 2025-04-03.

    Source
    Ivanti blog (April 3, 2025) vendor blog
    Recorded time
    Precision
    Date only (no time of day is shown)
    Origin
    Curated. Found by a researcher, with a verbatim quote and link.
    Quote check
    Found in the archived copy
    Snapshot
    sha256:73dc418d3286087b…
    Used in metrics
    Yes
    Dispute this timestamp

  5. Fixed for all versions

    No evidence yet of fixed releases for every supported branch.

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

  • Ivanti Connect Secure
  • Ivanti Policy Secure
  • Ivanti Neurons for ZTA gateways
  • Pulse Connect Secure 9.1x (end of support)
How we built this timeline

Fix-before-disclosure case: Connect Secure 22.7R2.6 (11 Feb 2025) fixed it; attackers (UNC5221, per Mandiant) likely reverse-engineered that patch and exploited unpatched appliances from mid-March 2025. Because a fix existed before exploitation began, exploited before a fix is false, but customers had no security advisory telling them to upgrade until 3 Apr 2025.

Fixed for all versions omitted: at disclosure Ivanti scheduled Neurons for ZTA 22.8R2.2 for 19 Apr 2025 and Policy Secure 22.7R1.4 for 21 Apr 2025 (CISA alert 4 Apr 2025, Censys); actual release dates were not confirmed (the Ivanti advisory is JavaScript-only). Pulse Connect Secure 9.1x reached end of support on 31 Dec 2024 and never got a fix.

KEV 4 Apr 2025 (ransomware use Known). Ivanti CVSS 9.0.

Related

Ivanti report card