# Identity Services Engine vulnerabilities > Identity Services Engine is made by Cisco. We track 149 published vulnerabilities listed under that exact name, across 111 versions. 3 of them are on the list of flaws known to be exploited, the newest added on 28 July 2025. Cisco lists newer releases under their own names, such as Identity Services Engine Software, so check those pages too. Canonical page: https://www.edgeprotect.io/product/cisco/identity_services_engine ## At a glance - **Made by:** [Cisco](https://www.edgeprotect.io/vendors/cisco) - **Published vulnerabilities:** 149 - **Known to be exploited:** 3 (listed under the name Identity Services Engine) - **Versions tracked:** 111 - **Most recently added to the known-exploited list:** [CVE-2025-20281](https://www.edgeprotect.io/what-is/cve-2025-20281), 28 July 2025. We keep watching the list. ## Is Identity Services Engine listed under other names? Cisco also lists Identity Services Engine under more specific names, such as Identity Services Engine Software and Identity Services Engine Passive Identity Connector. Flaws listed only under those names are counted on their own pages, not here. - [Identity Services Engine Software](https://www.edgeprotect.io/product/cisco/identity_services_engine_software): 49 published vulnerabilities - [Identity Services Engine Passive Identity Connector](https://www.edgeprotect.io/product/cisco/identity_services_engine_passive_identity_connector): 2 published vulnerabilities - [Identity Services Engine Express](https://www.edgeprotect.io/product/cisco/identity_services_engine_express): 1 published vulnerability - [Identity Services Engine Virtual Appliance](https://www.edgeprotect.io/product/cisco/identity_services_engine_virtual_appliance): 1 published vulnerability ## Which versions of Identity Services Engine do the exploited flaws hit? Each exploited flaw lists the versions it affects, as published. "before 2.4.0" means every version up to, but not including, 2.4.0. - [CVE-2025-20281](https://www.edgeprotect.io/what-is/cve-2025-20281) (Cisco Identity Services Engine Injection Vulnerability): 3.3.0, 3.3.0-patch1, 3.3.0-patch2, 3.3.0-patch3, 3.3.0-patch4, 3.3.0-patch5, 3.3.0-patch6, 3.4.0, 3.4.0-patch1 - [CVE-2025-20337](https://www.edgeprotect.io/what-is/cve-2025-20337) (Cisco Identity Services Engine Injection Vulnerability): 3.3.0, 3.3.0-patch1, 3.3.0-patch2, 3.3.0-patch3, 3.3.0-patch4, 3.3.0-patch5, 3.3.0-patch6, 3.4.0, 3.4.0-patch1 - [CVE-2021-44228](https://www.edgeprotect.io/what-is/cve-2021-44228) (Apache Log4j2 Remote Code Execution Vulnerability): before 2.4.0, 2.4.0, 003.000(000.458), 003.001(000.518), 003.002(000.116) ## Which Identity Services Engine vulnerabilities are being exploited? 3 flaws are on the government list of vulnerabilities known to be exploited, newest first: - [CVE-2025-20281](https://www.edgeprotect.io/what-is/cve-2025-20281): Cisco Identity Services Engine Injection Vulnerability. Critical, CVSS 10.0, chance of use in 30 days 97%, known exploited since 28 July 2025. - [CVE-2025-20337](https://www.edgeprotect.io/what-is/cve-2025-20337): Cisco Identity Services Engine Injection Vulnerability. Critical, CVSS 10.0, chance of use in 30 days 65%, known exploited since 28 July 2025. - [CVE-2021-44228](https://www.edgeprotect.io/what-is/cve-2021-44228): Apache Log4j2 Remote Code Execution Vulnerability. Critical, CVSS 10.0, chance of use in 30 days >99%, known exploited since 10 December 2021. ## Which Identity Services Engine flaws are most likely to be used? Ranked by the latest exploit-likelihood forecast (the chance each flaw is used in an attack in the next 30 days): - [CVE-2025-20281](https://www.edgeprotect.io/what-is/cve-2025-20281): 97%, Critical (CVSS 10.0), known exploited - [CVE-2025-20337](https://www.edgeprotect.io/what-is/cve-2025-20337): 65%, Critical (CVSS 10.0), known exploited - [CVE-2022-20964](https://www.edgeprotect.io/what-is/cve-2022-20964): 31%, High (CVSS 8.8) - [CVE-2022-20966](https://www.edgeprotect.io/what-is/cve-2022-20966): 28%, Medium (CVSS 5.4) - [CVE-2025-20124](https://www.edgeprotect.io/what-is/cve-2025-20124): 17%, Critical (CVSS 9.9) - [CVE-2025-20125](https://www.edgeprotect.io/what-is/cve-2025-20125): 15%, Critical (CVSS 9.1) - [CVE-2017-6747](https://www.edgeprotect.io/what-is/cve-2017-6747): 5.5%, Critical (CVSS 9.8) - [CVE-2016-9198](https://www.edgeprotect.io/what-is/cve-2016-9198): 3.3%, High (CVSS 7.5) - [CVE-2018-0213](https://www.edgeprotect.io/what-is/cve-2018-0213): 2.6%, High (CVSS 8.8) ## Questions ### How many vulnerabilities does Identity Services Engine have? We track 149 published vulnerabilities listed under the name Identity Services Engine, across 111 versions. The most recent Identity Services Engine flaw added to the known-exploited list is CVE-2025-20281, on 28 July 2025. ### Which Identity Services Engine vulnerabilities are being exploited? 3 are on the list of flaws known to be exploited. The most recently added are CVE-2025-20281, CVE-2025-20337 and CVE-2021-44228. ### Why are newer Identity Services Engine flaws missing from this page? Cisco also lists Identity Services Engine under more specific names, such as Identity Services Engine Software and Identity Services Engine Passive Identity Connector. Flaws listed only under those names are counted on their own pages, not here. Open the release you run to see its own list. ### Which versions of Identity Services Engine do the exploited flaws affect? Each flaw names its own versions, usually as ranges. The newest, CVE-2025-20281, affects 3.3.0, 3.3.0-patch1, 3.3.0-patch2, 3.3.0-patch3 and more. The versions for every exploited flaw are listed on this page. ### How do I get alerts for Identity Services Engine? Create a EdgeProtect account and track Identity Services Engine. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook. ## Running Identity Services Engine? EdgeProtect keeps checking for you: - **Tell us what you run.** Pick your software from a list, or let us work it out from your website. - **We match it to every flaw.** Over 400,000 published flaws, checked against your list. - **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it. - **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools. 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