CVE-2026-4390

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.26% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 17.7% of scored records. A rank, not a probability.

NVD base score

5.3 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-05-27 16:30Z3 MO AGO

Last updated

2026-05-27 17:58Z3 MO AGO

Reserved

2026-03-18

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 5.3)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X

Weaknesses

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass
• CWE-416Use After FreeVariant

Data version

5.2

Document digest

1f9f3ccd3897b94598a0aeeb3467f2ba8da11698da24c508229946b0c985ee7b

• vuldb.comVDB-366314 | TeamSpeak 3 Server Connection State Management process_resend_queue use after freehttps://vuldb.com/vuln/366314vdb-entrytechnical-description
• vuldb.comVDB-366314 | CTI Indicators (IOB, IOC, IOA)https://vuldb.com/vuln/366314/ctisignaturepermissions-required
• modzero.comhttps://modzero.com/en/advisories/mz-26-01-teamspeak/related
• files.teamspeak-services.comhttps://files.teamspeak-services.com/docs/security/TS-SA-2026-001.htmlrelated
• www.teamspeak.comhttps://www.teamspeak.com/en/downloads/#serverpatch