Threats / Oracle / CVE-2018-2628
CVE-2018-2628
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Oracle WebLogic Server vulnerability
Oracle WebLogic Server contains an unspecified deserialization vulnerability allowing unauthenticated remote attackers with T3 network access to compromise affected servers.
Verdict
Today item — known-exploited.
This vulnerability poses critical risk due to high exploitability (EPSS 0.94), active exploitation in the wild, and lack of authentication requirements. Affected organizations should prioritize patching to prevent unauthorized server compromise.
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Fully weaponized — public exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
3 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-09-08).
Probability (EPSS)
EPSS 0.99427 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Oracle, WebLogic Server. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-502 Deserialization of Untrusted Data — weakness family: Injection.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I craft a malicious T3 protocol message containing a serialized Java object designed to trigger unsafe deserialization.
Business
Attackers gain initial network access to WebLogic infrastructure without credentials, establishing a foothold for further compromise.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I send the crafted payload to an exposed WebLogic T3 listener port, triggering remote code execution through deserialization gadget chains.
Business
The organization loses control of the WebLogic server, enabling data theft, lateral movement, and potential ransomware deployment.
3
Lateral reach — past segmentation narrative 3
Attacker
I execute arbitrary commands with WebLogic process privileges to establish persistence and exfiltrate sensitive data.
Business
Confidentiality and integrity of business-critical applications and data are compromised, resulting in regulatory violations and reputational damage.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05