# Ivanti Connect Secure zero-days chained for mass VPN compromise · pwn.watch > Two Ivanti Connect Secure and Policy Secure zero-days, an authentication bypass (CVE-2023-46805) and a command injection (CVE-2024-21887), were chained for unauthenticated remote code execution on internet-facing VPN gateways. Volexity found them in the wild in December 2023 and disclosed them on 2024-01-10. A third bug, an SSRF in the SAML component (CVE-2024-21893), was exploited later in January. CISA issued Emergency Directive 24-01 and then ordered federal agencies to disconnect all Ivanti Connect Secure and Policy Secure appliances. Added to the CISA KEV catalog on 2024-01-10, 2024-01-31. CISA lists known use in ransomware campaigns. Page: https://pwn.watch/i/ivanti-connect-secure-zero-days-cve-2023-46805-cve-2024-21887-21893 · generated 2026-10-22T21:47:37.879Z ## Status - Severity: critical · status: closed · patch: patched - Product: Ivanti Connect Secure and Policy Secure / Connect Secure, Policy Secure, and Neurons - Started: 2024-01-10 · closed: 2024-01-31 - CVEs: CVE-2023-46805, CVE-2024-21887, CVE-2024-21893 - Affected: See vendor advisory (versions are not listed in the KEV record) - Fixed in: See vendor advisory linked in sources ## Follow this incident - RSS (one item per update): https://pwn.watch/i/ivanti-connect-secure-zero-days-cve-2023-46805-cve-2024-21887-21893/feed.xml - JSON Feed: https://pwn.watch/i/ivanti-connect-secure-zero-days-cve-2023-46805-cve-2024-21887-21893/feed.json - Full data (timeline, sources, posts, agentBrief): https://pwn.watch/i/ivanti-connect-secure-zero-days-cve-2023-46805-cve-2024-21887-21893.json - This file: https://pwn.watch/i/ivanti-connect-secure-zero-days-cve-2023-46805-cve-2024-21887-21893/llms.txt ## Updates (newest first) - 2024-01-31: CVE-2024-21893 published (https://nvd.nist.gov/vuln/detail/CVE-2024-21893) - 2024-01-31: CISA added CVE-2024-21893 to the KEV catalog (federal deadline 2024-02-02) (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) - 2024-01-31: CISA Supplemental Direction V1: federal agencies must disconnect all Ivanti Connect Secure and Policy Secure instances by 2024-02-02 (https://www.cisa.gov/news-events/directives/supplemental-direction-v1-ed-24-01-mitigate-ivanti-connect-secure-and-ivanti-policy-secure) - 2024-01-19: CISA issues Emergency Directive 24-01 for Ivanti Connect Secure and Policy Secure (https://www.cisa.gov/news-events/directives/ed-24-01-mitigate-ivanti-connect-secure-and-ivanti-policy-secure-vulnerabilities) - 2024-01-12: CVE-2023-46805 published (https://nvd.nist.gov/vuln/detail/CVE-2023-46805) - 2024-01-12: CVE-2024-21887 published (https://nvd.nist.gov/vuln/detail/CVE-2024-21887) - 2024-01-10: CISA added CVE-2023-46805 to the KEV catalog (federal deadline 2024-01-22) (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) - 2024-01-10: CISA added CVE-2024-21887 to the KEV catalog (federal deadline 2024-01-22) (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) - 2024-01-10: Volexity discloses active exploitation of two Ivanti Connect Secure zero-days (https://www.volexity.com/blog/2024/01/10/active-exploitation-of-two-zero-day-vulnerabilities-in-ivanti-connect-secure-vpn/) ## Fix brief # Security brief: Ivanti Connect Secure zero-days chained for mass VPN compromise Source: https://pwn.watch/i/ivanti-connect-secure-zero-days-cve-2023-46805-cve-2024-21887-21893 · status: closed (closed Jan 31, 2024) · severity: critical · updated Jan 31, 2024 ## Patch status **PATCHED: fixed releases exist. Upgrade to a fixed version.** ## What it is Two Ivanti Connect Secure and Policy Secure zero-days, an authentication bypass (CVE-2023-46805) and a command injection (CVE-2024-21887), were chained for unauthenticated remote code execution on internet-facing VPN gateways. Volexity found them in the wild in December 2023 and disclosed them on 2024-01-10. A third bug, an SSRF in the SAML component (CVE-2024-21893), was exploited later in January. CISA issued Emergency Directive 24-01 and then ordered federal agencies to disconnect all Ivanti Connect Secure and Policy Secure appliances. Added to the CISA KEV catalog on 2024-01-10, 2024-01-31. CISA lists known use in ransomware campaigns. Severity detail: CVSS 9.1 (v3.0, CNA), actively exploited (CISA KEV); known ransomware use - Product: Ivanti Connect Secure and Policy Secure / Connect Secure, Policy Secure, and Neurons - CVE / advisory ids: CVE-2023-46805, CVE-2024-21887, CVE-2024-21893 ## Affected versions - See vendor advisory (versions are not listed in the KEV record) ## Check whether you're affected No generic command applies (the product is a hosted service, appliance or desktop app). Check the installed version in its admin UI / About screen and compare with the versions above. ## Fix Upgrade to one of these fixed versions (or later on the same branch): - See vendor advisory linked in sources After upgrading, re-run the checks above and redeploy/restart the affected services. ## Latest updates - Jan 31, 2024: CVE-2024-21893 published - Jan 31, 2024: CISA added CVE-2024-21893 to the KEV catalog (federal deadline 2024-02-02) - Jan 31, 2024: CISA Supplemental Direction V1: federal agencies must disconnect all Ivanti Connect Secure and Policy Secure instances by 2024-02-02 - Jan 19, 2024: CISA issues Emergency Directive 24-01 for Ivanti Connect Secure and Policy Secure - Jan 12, 2024: CVE-2023-46805 published - Jan 12, 2024: CVE-2024-21887 published - Jan 10, 2024: CISA added CVE-2023-46805 to the KEV catalog (federal deadline 2024-01-22) - Jan 10, 2024: CISA added CVE-2024-21887 to the KEV catalog (federal deadline 2024-01-22) ## Advisories - [Ivanti KB: CVE-2023-46805 and CVE-2024-21887 for Ivanti Connect Secure and Policy Secure](https://forums.ivanti.com/s/article/CVE-2023-46805-Authentication-Bypass-CVE-2024-21887-Command-Injection-for-Ivanti-Connect-Secure-and-Ivanti-Policy-Secure-Gateways) (Ivanti) - [ED 24-01: Mitigate Ivanti Connect Secure and Ivanti Policy Secure vulnerabilities](https://www.cisa.gov/news-events/directives/ed-24-01-mitigate-ivanti-connect-secure-and-ivanti-policy-secure-vulnerabilities) (CISA) - [Supplemental Direction V1: ED 24-01](https://www.cisa.gov/news-events/directives/supplemental-direction-v1-ed-24-01-mitigate-ivanti-connect-secure-and-ivanti-policy-secure) (CISA) - [Ivanti advisory: CVE-2023-46805](https://forums.ivanti.com/s/article/KB-CVE-2023-46805-Authentication-Bypass-CVE-2024-21887-Command-Injection-for-Ivanti-Connect-Secure-and-Ivanti-Policy-Secure-Gateways?language=en_US) (Ivanti) - [NVD: CVE-2023-46805](https://nvd.nist.gov/vuln/detail/CVE-2023-46805) (NVD) - [NVD: CVE-2024-21887](https://nvd.nist.gov/vuln/detail/CVE-2024-21887) (NVD) - [NVD: CVE-2024-21893](https://nvd.nist.gov/vuln/detail/CVE-2024-21893) (NVD) - [CISA Known Exploited Vulnerabilities Catalog](https://www.cisa.gov/known-exploited-vulnerabilities-catalog) (CISA) ## Write-ups & news - [Active exploitation of two zero-day vulnerabilities in Ivanti Connect Secure VPN](https://www.volexity.com/blog/2024/01/10/active-exploitation-of-two-zero-day-vulnerabilities-in-ivanti-connect-secure-vpn/) - [Suspected APT targets Ivanti Connect Secure VPN in new zero-day exploitation](https://cloud.google.com/blog/topics/threat-intelligence/suspected-apt-targets-ivanti-zero-day) ## Caveats Derived from the CISA KEV JSON feed (catalogVersion 2026.10.21); CVSS from the CVE record (cveawg.mitre.org). startedAt is the CVE publication date when it fell in 2024 before the KEV listing, else the KEV dateAdded; exploitation may have begun earlier. closedAt is the KEV listing date (a fix or mitigation was available then unless noted). --- Machine-readable: https://pwn.watch/i/ivanti-connect-secure-zero-days-cve-2023-46805-cve-2024-21887-21893.json · all incidents: https://pwn.watch/incidents.json. Verify against the vendor advisory before changing production systems.