CVE-2021-24122
No exploitation reported by the sources we read.
- Published2021-01-14
- WeaknessCWE-200 · CWE-706
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
When serving resources from a network location using the NTFS file system, Apache Tomcat versions 10.0.0-M1 to 10.0.0-M9, 9.0.0.M1 to 9.0.39, 8.5.0 to 8.5.59 and 7.0.0 to 7.0.106 were susceptible to JSP source code disclosure in some configurations. The root cause was the unexpected behaviour of the JRE API File.getCanonicalPath() which in turn was caused by the inconsistent behaviour of the Windows API (FindFirstFileW) in some circumstances.
Timeline
dates in UTC- 2021-01-1415:15CVE publishedNVD
- 2026-10-2319:23EPSS crossed 10 %FIRST EPSS
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-24122?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-24122?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD · OSV| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 7.0 | ≥ 7.0.0, ≤ 7.0.106 | no fix published | NVD |
| 8.5 | ≥ 8.5.0, ≤ 8.5.59 | no fix published | NVD |
| 9.0 | ≥ 9.0.1, ≤ 9.0.39 | no fix published | NVD |
| 9.0 | = 9.0.0 | no fix published | NVD |
| 10.0 | = 10.0.0 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 10.0 | ≥ 10.0.0-M1, < 10.0.0-M10 | 10.0.0-M10 | OSV |
| 9.0 | ≥ 9.0.0, < 9.0.40 | 9.0.40 | OSV |
| 8.5 | ≥ 8.5.0, < 8.5.60 | 8.5.60 | OSV |
| 7.0 | ≥ 7.0.0, < 7.0.107 | 7.0.107 | OSV |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 9.0 | ≥ 9.0.1, < 9.0.40 | 9.0.40 | OSV |
| 8.5 | ≥ 8.5.0, < 8.5.60 | 8.5.60 | OSV |
| 7.0 | ≥ 7.0.0, < 7.0.107 | 7.0.107 | OSV |
2 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
Advisories and patches
- lists.apache.orgVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- Published
- 2021-01-14
- Last Modified
- 2026-10-08
- NVD status
- Modified
Frequently asked questions
What is CVE-2021-24122?
Is CVE-2021-24122 actively exploited?
What is the CVSS score for CVE-2021-24122?
Running Apache Tomcat? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.