Event Monitor Cyber
EM-20261111-KDF4 VulnerabilityCritical severity

Critical Fortinet FortiClientMac Vulnerability (CVE-2026-121529)

CVE-2026-121529

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Status
Developing

Since : signals keep joining.

First Signal
Nov 10 20:18 UTCC6 NVD CVE API 2.0
Page Born
Nov 11 13:21 UTCsecond source joined
Last Signal
Nov 11 14:51 UTC8 hours before snapshot
Sources
30 official · 3 research, news or crowd
Open For
19 hoursso far

Life Of This Page

  1. 1
    Born
    A second, independent source names it.
  2. 2
    Developing · Now
    New signals join; severity can move.
  3. 3
    Confirmed
    Not yet
    CISA KEV lists it, or exploitation in the wild is reported.
  4. 4
    Resolved
    Not yet
    Past the fix deadline and 14 days with no new signal.
  5. 5
    Archived
    Not yet
    30 days after resolved. Read only; the link keeps working. Reopens if it comes back.

The ID never changes, and earlier addresses keep working. A correction is logged, never overwritten. If two pages turn out to be one incident, the later one points to the earlier.

Vulnerability Lifecycle

  1. Disclosed: reached
    Nov 10 20:18 UTC
    C6 NVD published
  2. Scored: reached
    Nov 10 20:18 UTC
    CVSS 9.6
  3. Exploited: not yet
    Not yet
    No exploitation reported
  4. Advisories: not yet
    Not yet
    None yet
  5. Vendor Response: not yet
    Not yet
    None in sources yet
  6. Resolved: not yet
    Not yet
    After 14 quiet days

Timeline

18:00Nov 1106:0012:00BornC6 NVD CVE API 2.0C171 GBHackersC31 Vulners (new public exploits)

Point at a mark to read it. Squares are signals, colored by severity; every one is also listed under Signals.

Signals

  1. Public exploit: Exploit for CVE-2026-121529 (opens source in a new tab) # CVE-2026-121529 — FortiClient local API origin validation error (drive-by RCE) | | | |---|---| | **CVE** | CVE-2026-121529 | | **Component** | FortiClient / FortiClient Windows PAM / FortiClient Mac — local API… High severityResearch & NewsC31 Vulners (new public exploits)
  2. Fortinet2Shell Vulnerability Lets Hackers Execute Code on FortiClient Systems Through Malicious Websites (opens source in a new tab) Fortinet has patched a critical flaw in FortiClient that lets attackers run code on a victim's computer through a malicious website. The bug is tracked as CVE-2026-121529 (advisory FG-IR-26-194). Researcher Kevin… Med severityResearch & NewsC171 GBHackers
  3. CVE-2026-121529 (CVSS 9.6) (opens source in a new tab) A origin validation error vulnerability in Fortinet FortiClientMac 7.4.0 through 7.4.7, FortiClientWindows 7.4.0 through 7.4.7, FortiClientWindows 7.2.0 through 7.2.14, FortiClientWindowsPAM 7.4.7… Crit severityDatabaseC6 NVD CVE API 2.0