Vulnerability · CVE-2025-36038
IBM WebSphere Application Server 8.5 and 9.0 could allow a remote attacker to execute arbitrary code on the system with a specially crafted sequence of serialized objects.
Published Jun 25, 2025 · catalog updated Feb 26, 2026 · IBM WebSphere Application Server
Last checked Oct 24, 2026. A connected source was read within the last 7 days.
Check this week
CVE-2025-36038 is not in CISA KEV. FIRST estimates a 13.31% chance of exploitation in the next 30 days. Check whether you run IBM WebSphere Application Server.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2025-36099 · Medium
- CVE-2025-33142 · Medium
- CVE-2025-33104 · Medium
- CVE-2025-27907 · Medium
- Severity
- Critical9.0
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 13.31%
- Remediation
- Vendor / distro source
- Affected products
- vendor IBM WebSphere Application Server 9.0
IBM WebSphere Application Server 8.5 and 9.0 could allow a remote attacker to execute arbitrary code on the system with a specially crafted sequence of serialized objects.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor IBM WebSphere Application Server 9.09.0
How to fix CVE-2025-36038
No stored fix
No vendor fix text is stored. Use the linked advisory before you change production.
Version check
Seen in 9.0
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
CVE-2025-36038 is not in CISA KEV. FIRST estimates a 13.31% chance of exploitation in the next 30 days. Check whether you run IBM WebSphere Application Server.
Which versions are affected?
Compare what you have installed with IBM WebSphere Application Server 9.0 9.0. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 13.31%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Jun 25, 2025 · EUVD
Detected
IBM WebSphere Application Server 8.5 and 9.0 could allow a remote attacker to execute arbitrary code on the system with a specially crafted sequence of serialized objects.
Feb 26, 2026 · EUVD
Updated
IBM WebSphere Application Server 8.5 and 9.0 could allow a remote attacker to execute arbitrary code on the system with a specially crafted sequence of serialized objects.
Sources
- CVE.orgVulnerability recordCVE-2025-36038
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2025-36038
30-day exploitation probability 13.31%
first.org - EUVDVulnerability recordEUVD-2025-19137
IBM WebSphere Application Server 8.5 and 9.0 could allow a remote attacker to execute arbitrary code on the system with a specially crafted sequence of serialized objects.
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Oct 24, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSOct 24, 2026
- CVE.orgOct 21, 2026
- EUVDOct 18, 2026