ExploitedIn CISA KEVFix available

CVE-2017-5638

Q: Is CVE-2017-5638 actively exploited?

Yes. CVE-2017-5638 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-05-03.

Q: What is the CVSS score for CVE-2017-5638?

CVE-2017-5638 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Exploitation confirmed. First attested on 2021-11-03 by CISA-ADP, CISA KEV, GCVE · kevintel, GCVE · shadowserver.

Published2017-03-11
WeaknessCWE-755

Am I 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

The Jakarta Multipart parser in Apache Struts 2 2.3.x before 2.3.32 and 2.5.x before 2.5.10.1 has incorrect exception handling and error-message generation during file-upload attempts, which allows remote attackers to execute arbitrary commands via a crafted Content-Type, Content-Disposition, or Content-Length HTTP header, as exploited in the wild in March 2017 with a Content-Type header containing a #cmd= string.

Timeline

dates in UTC

2017-03-1102:59CVE publishedNVD
2021-11-03Listed as exploited by GCVEGCVE
2021-11-03Exploitation first reportedCISA KEV
2021-11-03Added to the CISA KEV catalogCISA KEV
2025-02-0621:06SSVC exploitation set to activeCISA-ADP
2026-10-2319:23First public proof of conceptPoC-in-GitHub
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2017-5638?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-5638?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Hp server automation

Branch	Affected	Fixed in	Source
10.5	= 10.5.0	no fix published	NVD
9.1	= 9.1.0	no fix published	NVD
10.0	= 10.0.0	no fix published	NVD
10.1	= 10.1.0	no fix published	NVD
10.2	= 10.2.0	no fix published	NVD

Oracle weblogic server

Branch	Affected	Fixed in	Source
10.3	= 10.3.6.0.0	no fix published	NVD
12.1	= 12.1.3.0.0	no fix published	NVD
12.2	= 12.2.1.1.0	no fix published	NVD
12.2	= 12.2.1.2.0	no fix published	NVD

Apache struts

Branch	Affected	Fixed in	Source
2.5	≥ 2.5.0, < 2.5.10.1	2.5.10.1	NVD
2.x	≥ 2.2.3, < 2.3.32	2.3.32	NVD

6 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

CISA’s required action: Apply updates per vendor instructions.due 2022-05-03

Advisories and patches

www.oracle.comPatch
cwiki.apache.orgMitigation · Vendor Advisory
cwiki.apache.orgMitigation · Vendor Advisory
struts.apache.orgMitigation · Vendor Advisory
struts.apache.orgMitigation · Vendor Advisory

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 20 repositories, unverifiedPolarisLab/S2-045Flyteas/Struts2-045-Expbongbongco/cve-2017-5638jas502n/S2-045-EXP-POC-TOOLSbtamburi/strutszeiro

CISA Known Exploited Vulnerability

Date Added: 2021-11-03
Patch Due Date: 2022-05-03
Ransomware Use: Known
Required Action: Apply updates per vendor instructions.

Sources

CISA KEVKEV entry2021-11-03
GCVEexploitation2021-11-03
CISA-ADPSSVC decisionactive2025-02-06
OpenCVESSVC decisionactive—
CISA-ADPCVSS 3.19.82025-02-06
NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.010read 2026-10-23
CISA-ADPweakness (CWE)CWE-7552025-02-06
NVDweakness (CWE)CWE-755read 2026-10-23
FIRST EPSSEPSS score99.9 %read 2026-10-23
PoC-in-GitHubproof of concept20read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2017-03-11
Last Modified: 2026-06-17
NVD status: Analyzed

Frequently asked questions

What is CVE-2017-5638?

Is CVE-2017-5638 actively exploited?

Yes. CVE-2017-5638 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-05-03.

What is the CVSS score for CVE-2017-5638?

CVE-2017-5638 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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