Critical security advisoryCriticalFlagged by our vulnerability database: PHP2Shell is on CISA’s exploited list. Most WordPress hosting runs PHP. See if your site is affectedFlagged by our vulnerability database: PHP2Shell is being exploited. DetailsExploited: PHP2Shell. Check your site
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Updated 3 h ago

Vulnerability database

Every flaw the U.S. government’s cybersecurity agency (CISA) has confirmed attackers are using, plus the new WordPress plugin and theme bugs published each day, sorted by what they mean for a small business. We refresh it twice a day. If you see something your website or office runs, tell us.

1,762exploited flaws on CISA’s list
34added in the last 30 days
344new WordPress flaws this week
390,080entries in the database

7 results

  • Aug 26, 2026Citrix NetScaler ADC and NetScaler Gateway Improper Restriction of Operations within the Bounds of a Memory Buffer VulnerabilityCVE-2026-8452 · Network & remote access · Citrix · reported by 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5ExploitedHigh 8.8

    Citrix NetScaler ADC and NetScaler Gateway contain an improper restriction of operations within the bounds of a memory buffer vulnerability which could lead to denial of service.

    Product
    NetScaler ADC and NetScaler Gateway
    On CISA’s list since
    Aug 26, 2026 (federal fix deadline Aug 29, 2026)
    What to do
    Attackers are using this now. Install Citrix’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.

    Full record and what to do →NVD recordCISA catalogsupport.citrix.comcisa.gov

  • Jul 10, 2025Citrix NetScaler ADC and Gateway Out-of-Bounds Read VulnerabilityCVE-2025-5777 · Network & remote access · Citrix · reported by secure@citrix.comExploitedRansomwareCritical 9.3

    Citrix NetScaler ADC and Gateway contain an out-of-bounds read vulnerability due to insufficient input validation. This vulnerability can lead to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server.

    Product
    NetScaler ADC and Gateway
    On CISA’s list since
    Jul 10, 2025 (federal fix deadline Jul 11, 2025)
    What to do
    Attackers are using this now. Install Citrix’s update today (ransomware groups use this one). If there is no update for your version, take the product off the internet or stop using it until there is.

    Full record and what to do →NVD recordCISA catalogsupport.citrix.comcitrixbleed.com

  • Jun 30, 2025Citrix NetScaler ADC and Gateway Buffer Overflow VulnerabilityCVE-2025-6543 · Network & remote access · Citrix · reported by secure@citrix.comExploitedCritical 9.2

    Citrix NetScaler ADC and Gateway contain a buffer overflow vulnerability leading to unintended control flow and Denial of Service. NetScaler must be configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server.

    Product
    NetScaler ADC and Gateway
    On CISA’s list since
    Jun 30, 2025 (federal fix deadline Jul 21, 2025)
    What to do
    Attackers are using this now. Install Citrix’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.

    Full record and what to do →NVD recordCISA catalogsupport.citrix.comcisa.gov

  • Jan 17, 2024Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow VulnerabilityCVE-2023-6549 · Network & remote access · Citrix · reported by secure@citrix.comExploitedHigh 8.2

    Citrix NetScaler ADC and NetScaler Gateway contain a buffer overflow vulnerability that allows for a denial-of-service when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server.

    Product
    NetScaler ADC and NetScaler Gateway
    On CISA’s list since
    Jan 17, 2024 (federal fix deadline Feb 7, 2024)
    What to do
    Attackers are using this now. Install Citrix’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.

    Full record and what to do →NVD recordCISA catalogsupport.citrix.comsupport.citrix.com

  • Jan 17, 2024Citrix NetScaler ADC and NetScaler Gateway Code Injection VulnerabilityCVE-2023-6548 · Network & remote access · Citrix · reported by secure@citrix.comExploitedMedium 5.5

    Citrix NetScaler ADC and NetScaler Gateway contain a code injection vulnerability that allows for authenticated remote code execution on the management interface with access to NSIP, CLIP, or SNIP.

    Product
    NetScaler ADC and NetScaler Gateway
    On CISA’s list since
    Jan 17, 2024 (federal fix deadline Jan 24, 2024)
    What to do
    Attackers are using this now. Install Citrix’s update today. If there is no update for your version, take the product off the internet or stop using it until there is.

    Full record and what to do →NVD recordCISA catalogsupport.citrix.comsupport.citrix.com

  • Oct 18, 2023Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow VulnerabilityCVE-2023-4966 · Network & remote access · Citrix · reported by secure@citrix.comExploitedRansomwareCritical 9.4

    Citrix NetScaler ADC and NetScaler Gateway contain a buffer overflow vulnerability that allows for sensitive information disclosure when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server.

    Product
    NetScaler ADC and NetScaler Gateway
    On CISA’s list since
    Oct 18, 2023 (federal fix deadline Nov 8, 2023)
    What to do
    Attackers are using this now. Install Citrix’s update today (ransomware groups use this one). If there is no update for your version, take the product off the internet or stop using it until there is.

    Full record and what to do →NVD recordCISA catalogpacketstormsecurity.comsupport.citrix.com

  • Jul 19, 2023Citrix NetScaler ADC and NetScaler Gateway Code Injection VulnerabilityCVE-2023-3519 · Network & remote access · Citrix · reported by secure@citrix.comExploitedRansomwareCritical 9.8

    Citrix NetScaler ADC and NetScaler Gateway contains a code injection vulnerability that allows for unauthenticated remote code execution.

    Product
    NetScaler ADC and NetScaler Gateway
    On CISA’s list since
    Jul 19, 2023 (federal fix deadline Aug 9, 2023)
    What to do
    Attackers are using this now. Install Citrix’s update today (ransomware groups use this one). If there is no update for your version, take the product off the internet or stop using it until there is.

    Full record and what to do →NVD recordCISA catalogpacketstormsecurity.comsupport.citrix.com

Where this comes from: the exploited list is CISA’s Known Exploited Vulnerabilities catalog. Everything else is the whole National Vulnerability Database, where each record is published by the team that found the bug (Wordfence, Patchstack, WPScan, the vendors themselves and others); we show who. Exploit odds are FIRST’s EPSS, updated daily. Titles and categories are ours, so check the linked record before acting on a detail. For a write-up of the big ones, see our advisories. Every vendor, and every WordPress plugin and theme with a recorded flaw, also has its own page. All of it is free to reuse as JSON, CSV or RSS.

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