Exploited vulnerability · CISA KEV

Is CVE-2017-1000353 exploited? Yes: in CISA KEV since 2 Oct 2025

Gociux · Jenkins · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2017-1000353, Jenkins Remote Code Execution Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 2 Oct 2025, 2803 days after it was published. It affects Jenkins. If you run it, CISA's required action is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

What it is

Jenkins contains a remote code execution vulnerability. This vulnerability that could allowed attackers to transfer a serialized Java SignedObject object to the remoting-based Jenkins CLI, that would be deserialized using a new ObjectInputStream, bypassing the existing blocklist-based protection mechanism.

What to do

1. Check whether you run it. Look for Jenkins in your asset inventory, including appliances and cloud images. Stack check lists every exploited Jenkins CVE at once.
2. Apply the fix. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 29 Jan 2018.
4. Get told next time. Email alerts when CISA adds a CVE for Jenkins.

References

• www.jenkins.io/security/advisory/2017-04-26/
• nvd.nist.gov/vuln/detail/CVE-2017-1000353

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in October 2025 · Jenkins scorecard · act-now radar.