CVE-2021-41079

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

7.18% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 94.2% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-10-08.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-09-16 14:40Z5 YR AGO

Last updated

2026-10-08 21:13Z20 DAYS AGO

Reserved

2021-09-15

Assigning CNA

apache

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-20Improper Input ValidationClass
• CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')Base
• CWE-400Uncontrolled Resource ConsumptionClass

Data version

5.2

Document digest

c1a650b5ab7e604b28bf0d2829c609363b027b35153f6a88d8b645ab4eae7809

• lists.apache.orghttps://lists.apache.org/thread.html/rccdef0349fdf4fb73a4e4403095446d7fe6264e0a58e2df5c6799434%40%3Cannounce.tomcat.apache.org%3Ex_refsource_MISC
• lists.debian.org[debian-lts-announce] 20210922 [SECURITY] [DLA 2764-1] tomcat8 security updatehttps://lists.debian.org/debian-lts-announce/2021/09/msg00012.htmlmailing-listx_refsource_MLIST
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20211008-0005/x_refsource_CONFIRM
• lists.apache.org[tomcat-dev] 20211014 [SECURITY] CVE-2021-42340 Apache Tomcat DoShttps://lists.apache.org/thread.html/rb4de81ac647043541a32881099aa6eb5a23f1b7fd116f713f8ab9dbe%40%3Cdev.tomcat.apache.org%3Emailing-listx_refsource_MLIST
• lists.apache.org[tomcat-users] 20211014 [SECURITY] CVE-2021-42340 Apache Tomcat DoShttps://lists.apache.org/thread.html/r6b6b674e3f168dd010e67dbe6848b866e2acf26371452fdae313b98a%40%3Cusers.tomcat.apache.org%3Emailing-listx_refsource_MLIST
• www.debian.orgDSA-4986https://www.debian.org/security/2021/dsa-4986vendor-advisoryx_refsource_DEBIAN