Exploited now

Every vulnerability CISA confirms is being exploited in the wild: listed in its Known Exploited Vulnerabilities catalog, or assessed as actively exploited in its Vulnrichment data, often days before the catalog. When it was confirmed, how soon after the CVE went public, and the vendors attackers go after first. Refreshed every ten minutes. Sources.

Updated under an hour ago ()

What this means for you

34 vulnerabilities confirmed exploited in the last 30 days; 39% of the last 12 months' were exploited by the day they were disclosed. Add your stack to see which of them you run.

Confirmed exploited, last 30 days
34
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Exploited by the day of disclosure, last 12 months
39%
of 303 confirmed
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Median days from disclosure to confirmed exploitation
4
last 12 months; list sorted fastest first
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Used in ransomware campaigns, last 12 months
25
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What this means for a patch cycle

Half of the vulnerabilities CISA confirmed exploited in the last 12 months were confirmed within 4 days of going public, and 39% by the day they were published. A monthly patch cycle leaves those exposed for weeks. Products from the vendors below, especially internet-facing ones, need an emergency patch path measured in days.

Where attackers strike first

Vendors by vulnerabilities confirmed exploited in the last 24 months; the top five account for 67% of the twelve listed. This counts confirmed attacks, not disclosed flaws, so a vendor is not rewarded for publishing fewer CVEs. Mapped health IT products account for 1 of them.
Vendors by vulnerabilities confirmed exploited
Microsoft80
Cisco29
Apple19
Fortinet17
Google16
Linux16
Ivanti13
Adobe11
Citrix11
Palo Alto Networks11

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Every confirmed exploitation

Showing: confirmed in 2022 to 2026, CWE-502 Deserialization of Untrusted Data

Confirmed exploited in 2022 to 2026. Weakness: CWE-502 Deserialization of Untrusted Data. Clear these

62 exploited CVEs
Showing 1 to 10. Open a CVE for every field; narrower screens show fewer columns.
CVEVendor and vulnerabilityConfirmed exploitedAfter publicationSeverityEPSS
CVE-2021-23758
CISA KEV
Ajax.NET Professional · Ajax.NET Professional
Ajax.NET Professional Deserialization of Untrusted Data Vulnerability
CISA remediation due for federal agencies: Sep 9, 2026
Aug 25, 20261,726 daysHigh 8.183%
CVE-2026-63077
CISA KEV
Ransomware
JetBrains · TeamCity
JetBrains TeamCity Deserialization of Untrusted Data Vulnerability
CISA remediation due for federal agencies: Aug 8, 2026
Jul 26, 20261 day before publicationCritical 9.894%
CVE-2026-58644
CISA KEV
Microsoft · SharePoint
Microsoft SharePoint Deserialization of Untrusted Data Vulnerability
CISA remediation due for federal agencies: Jul 19, 2026
Jul 15, 20261 dayCritical 9.816%
CVE-2026-50522
CISA KEV
Microsoft · SharePoint
Microsoft SharePoint Deserialization of Untrusted Data Vulnerability
CISA remediation due for federal agencies: Jul 25, 2026
Jul 12, 20262 days before publicationCritical 9.83%
CVE-2026-12569
CISA KEV
Ransomware
PTC · Windchill and FlexPLM
PTC Windchill and FlexPLM Improper Input Validation Vulnerability
CISA remediation due for federal agencies: Jun 28, 2026
Jun 24, 20267 daysCritical 9.346%
CVE-2026-45247
CISA KEV
Mirasvit · Mirasvit Full Page Cache Warmer
Mirasvit Full Page Cache Warmer Deserialization of Untrusted Data Vulnerability
CISA remediation due for federal agencies: Jun 6, 2026
Jun 2, 20267 daysCritical 9.826%
CVE-2026-45659
CISA KEV
Ransomware
Microsoft · SharePoint Server
Microsoft SharePoint Server Deserialization of Untrusted Data Vulnerability
CISA remediation due for federal agencies: Jul 4, 2026
May 25, 20263 daysHigh 8.880%
CVE-2026-20131
CISA KEV
Ransomware
Cisco · Secure Firewall Management Center (FMC)
Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management Deserialization of Untrusted Data Vulnerability
CISA remediation due for federal agencies: Mar 22, 2026
Mar 3, 20261 day before publicationCritical 10.043%
CVE-2025-40551
CISA KEV
SolarWinds · Web Help Desk
SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability
CISA remediation due for federal agencies: Feb 6, 2026
Feb 3, 20266 daysCritical 9.884%
CVE-2026-20963
CISA KEV
Microsoft · SharePoint
Microsoft SharePoint Deserialization of Untrusted Data Vulnerability
CISA remediation due for federal agencies: Mar 21, 2026
Jan 7, 20266 days before publicationCritical 9.829%

How to read this

"Confirmed exploited" is the date CISA added the CVE to its Known Exploited Vulnerabilities catalog or assessed it as actively exploited, whichever came first. It is when exploitation was confirmed publicly, not when attackers started, so "after publication" is an upper bound: attackers were there at least that soon. "By disclosure day" means confirmed on or before the day the CVE record was published, the closest public measure of a zero-day. Dates are US Eastern, the calendar CISA uses. Vendors are named as CISA's catalog names them, otherwise as the assigning CNA does. EPSS is FIRST's estimate of the chance of exploitation in the next 30 days.

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