Apache Tomcat Remote Code Execution Vulnerability

CheckOps priority index

8.6/10 Patch within 24 h

Severity8.1

Probability10.0

Exploitation4/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 99.97% higher than 99.98% of CVEs

CVSS 3.1 8.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:

Exploited for 1,684 days 25 Mar 2022

CISA due date 15 Apr 2022 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 4 / 5

KEV catalog (CISA)25 Mar 2022
Exploited in EUVD (ENISA)25 Mar 2022
Used by ransomwareno
EPSS above 10 %99.97%
No account, over the networkyes

What to do

Fix

Apply the vendor’s fix as soon as it is available.

CISA guidance: Apply updates per vendor instructions.

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Description ENISA EUVD

When running Apache Tomcat versions 9.0.0.M1 to 9.0.0, 8.5.0 to 8.5.22, 8.0.0.RC1 to 8.0.46 and 7.0.0 to 7.0.81 with HTTP PUTs enabled (e.g. via setting the readonly initialisation parameter of the Default servlet to false) it was possible to upload a JSP file to the server via a specially crafted request. This JSP could then be requested and any code it contained would be executed by the server.

Affected products

Apache TomcatTomcat

Affected versions

9.0.0.M1 to 9.0.0
7.0.0 to 7.0.81
8.5.0 to 8.5.22
8.0.0.RC1 to 8.0.46

Weaknesses (CWE)

CWE-434

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

03 Oct 2017
Published
25 Mar 2022
Exploitation reported (ENISA)
25 Mar 2022
Added to the KEV catalog
15 Apr 2022
CISA remediation due date
26 Sept 2026
EPSS peak: 99.97%

Other exploited vulnerabilities from the same vendor

CVE-2016-3081Apache Struts Command Injection Vulnerability
8.5 · Rising fast
CVE-2026-34486Apache Tomcat Missing Encryption of Sensitive Data Vulnerability
8.4 · Actively exploited
CVE-2026-34197Apache ActiveMQ Improper Input Validation Vulnerability
8.3 · Background exploitation
CVE-2024-38475Apache HTTP Server Improper Escaping of Output Vulnerability
9.0 · Background exploitation
CVE-2025-24813Apache Tomcat Path Equivalence Vulnerability
9.4 · Background exploitation
CVE-2024-45195Apache OFBiz Forced Browsing Vulnerability
9.3 · Background exploitation