CVE-2026-4390 | BDVDB-2026-335240 Detail

TeamSpeak 3 Server

Description#

A weakness has been identified in TeamSpeak 3 Server up to 3.13.7. This affects the function process_resend_queue of the component Connection State Management. This manipulation causes use after free. The attack may be initiated remotely. Upgrading to version 3.13.8 is able to mitigate this issue. The affected component should be upgraded.

Impact#

Per CVSS v3.1: confidentiality impact none, integrity impact low, availability impact low. Attack vector: network.

Weaknesses#

CWE-416 Use After Free
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References#

Exploit#

No public exploit known

History#

Version 12026-05-27Record published in the CVE List.

Published

Published: 2026-05-27
Last modified: 2026-05-27

Vendor information

Vendor: Not stated
Product: TeamSpeak 3 Server

Score

5.4 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 17.8.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Memory Corruption

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
3.13.0
Fixed
Not stated
Vulnerable
3.13.1
Fixed
Not stated
Vulnerable
3.13.2
Fixed
Not stated
Vulnerable
3.13.3
Fixed
Not stated
Vulnerable
3.13.4
Fixed
Not stated
Vulnerable
3.13.5
Fixed
Not stated
Vulnerable
3.13.6
Fixed
Not stated
Vulnerable
3.13.7
Fixed
Not stated

Scoring System

CVSS v4.0

5.3 Medium

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Attack Requirements	None
Privileges Required	Low
User Interaction	None
Vulnerable System Confidentiality	None
Vulnerable System Integrity	Low
Vulnerable System Availability	Low
Subsequent System Confidentiality	None
Subsequent System Integrity	None
Subsequent System Availability	None

CVSS v3.1

5.4 Medium

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:X/RL:O/RC:C

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	Low
User Interaction	None
Scope	Unchanged
Confidentiality	None
Integrity	Low
Availability	Low

CVSS v3.0

5.4 Medium

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:X/RL:O/RC:C

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	Low
User Interaction	None
Scope	Unchanged
Confidentiality	None
Integrity	Low
Availability	Low

CVSS v2

5.5 Medium

AV:N/AC:L/Au:S/C:N/I:P/A:P/E:ND/RL:OF/RC:C

Metric breakdown
Access Vector	Network
Access Complexity	Low
Authentication	Single
Confidentiality Impact	None
Integrity Impact	Partial
Availability Impact	Partial

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).