CVE-2026-25657 PUBLISHED

Ericsson Packet Core Gateway (PCG) - Improper Handling of Syntactically Invalid Structure Vulnerability

Assigner: ERIC
Reserved: 04.02.2026 Published: 05.06.2026 Updated: 05.06.2026

Ericsson Packet Core Gateway (PCG) versions prior to 1.30 contain an Improper Handling of Syntactically Invalid Structure (CWE-228) vulnerability where an attacker continuously sending a specially crafted message can cause service degradation. The impact continues as long the attack persists but the system recovers from the crashes when the attack stops.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS Score: 7.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Adjacent	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	Ericsson
Product	Packet Core Gateway (PCG)
Versions	Default: affected affected from 0 to 1.30 (excl.)

Credits

Clemens Keil, Manfred Heinz, Patrick Walker of BDO Cyber Security GmbH finder
BSI 5G/6G Security Lab TEMIS (Federal Office for Information Security, Germany) finder

References

https://www.ericsson.com/en/about-us/security/psirt/cve-2026-25657

Problem Types

CWE-228 CWE