Medium 6.5Published Jul 12, 2021

CVE-2021-30640Auth weakness in JNDIRealm

Updated under an hour ago (Oct 26, 2026, 1:40 PM ET)

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It affects Apache Software Foundation Apache Tomcat and 7 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Apache Software Foundation Apache Tomcat

Exploited in the last 30 days

A vulnerability in the JNDI Realm of Apache Tomcat allows an attacker to authenticate using variations of a valid user name and/or to bypass some of the protection provided by the LockOut Realm. This issue affects Apache Tomcat 10.0.0-M1 to 10.0.5; 9.0.0.M1 to 9.0.45; 8.5.0 to 8.5.65.

CVSS: 6.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: apache
NVD analysis: Modified
Record last updated: Oct 8, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Apache Software Foundation Apache Tomcat apache_software_foundation:apache_tomcat (from the name)	Apache Tomcat 10 10.0.0-M1 to 10.0.5; Apache Tomcat 9 9.0.0.M1 to 9.0.45; Apache Tomcat 8.5 8.5.0 to 8.5.65; Apache Tomcat 7 7.0.0 to 7.0.108	CNA record
apache tomcat apache:tomcat	from 7.0.0 before 7.0.109; from 8.5.0 before 8.5.66; from 9.0.0 before 9.0.46; from 10.0.0 before 10.0.6	NVD
oracle communications_cloud_native_core_policy oracle:communications_cloud_native_core_policy	1.14.0	NVD
oracle communications_diameter_signaling_router oracle:communications_diameter_signaling_router	from 8.0.0 through 8.5.0	NVD
oracle communications_pricing_design_center oracle:communications_pricing_design_center	12.0.0.3.0	NVD
oracle hospitality_cruise_shipboard_property_management_system oracle:hospitality_cruise_shipboard_property_management_system	20.1.0	NVD
oracle tekelec_platform_distribution oracle:tekelec_platform_distribution	from 7.4.0 through 7.7.1	NVD
debian debian_linux debian:debian_linux	9.0; 10.0; 11.0	NVD

References

References

https://lists.apache.org/thread.html/r59f9ef03929d32120f91f4ea7e6e79edd5688d75d0a9b65fd26d1fe8%40%3Cannounce.tomcat.apache.org%3E	x-refsource-misc
https://www.oracle.com//security-alerts/cpujul2021.html	x-refsource-misc
https://lists.debian.org/debian-lts-announce/2021/08/msg00009.html	mailing-list, x-refsource-mlist
https://www.debian.org/security/2021/dsa-4952	vendor-advisory, x-refsource-debian
https://www.debian.org/security/2021/dsa-4986	vendor-advisory, x-refsource-debian
https://www.oracle.com/security-alerts/cpuoct2021.html	x-refsource-misc
https://security.netapp.com/advisory/ntap-20210827-0007/	x-refsource-confirm
https://www.oracle.com/security-alerts/cpujan2022.html	x-refsource-misc
https://security.gentoo.org/glsa/202208-34	vendor-advisory, x-refsource-gentoo

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.