PatchTheCVECVE-2020-35510: A flaw was found in jboss-remoting in versions before 5.0.20.SP1-redhat-00001
CVE-2020-35510 is a medium-severity flaw (CVSS 5.9) affecting jboss-remoting. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A flaw was found in jboss-remoting in versions before 5.0.20.SP1-redhat-00001. A malicious attacker could cause threads to hold up forever in the EJB server by writing a sequence of bytes corresponding to the expected messages of a successful EJB client request, but omitting the ACK messages, or just tamper with jboss-remoting code, deleting the lines that send the ACK message from the EJB client code resulting in a denial of service. The highest
Why this priority
- Remotely exploitable, no login, no user action
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.9 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.1% (top 35%) |
| CISA exploited list | No |
| Weakness | CWE-400 |
| Published | 2021-06-02 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2020-35510?
jboss-remoting: upgrade to 5.0.20. Exact commands for each OS are on this page.
Is CVE-2020-35510 being exploited?
CVE-2020-35510 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2020-35510 affect?
CVE-2020-35510 affects jboss-remoting. Severity is medium (CVSS 5.9). A flaw was found in jboss-remoting in versions before 5.0.20.SP1-redhat-00001. A malicious attacker could cause threads to hold up forever in the EJB server by writing a sequence of bytes corresponding to the expected messages of a successf
How urgent is CVE-2020-35510?
Priority 47/100. Remotely exploitable, no login, no user action; On your watchlist
Software pages
JBoss and WildFly vulnerabilities
Related CVEs
- CVE-2019-19343 HIGH 7.5 UPGRADE UPGRADE A flaw was found in Undertow when using Remoting as shipped in Red Hat Jboss EAP before version 7.2.4
- CVE-2018-1041 HIGH 7.5 DOWNGRADE DOWNGRADE A vulnerability was found in the way RemoteMessageChannel, introduced in jboss-remoting versions 3.3.10, reads