CVE-2026-25657

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

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

Configurations

Configuration 1 (hide)

cpe:2.3:a:ericsson:packet_core_gateway:*:*:*:*:*:*:*:*

History

26 Oct 2026, 11:10

Type	Values Removed	Values Added
Summary		(es) Versiones de Ericsson Packet Core Gateway (PCG) anteriores a la 1.30 contienen una vulnerabilidad de Manejo Inadecuado de Estructura Sintácticamente Inválida (CWE-228) donde un atacante que envía continuamente un mensaje especialmente diseñado puede causar degradación del servicio. El impacto continúa mientras el ataque persista, pero el sistema se recupera de las caídas cuando el ataque cesa.

Information

Published : 2026-06-05 12:16

Updated : 2026-10-26 11:10

NVD link : CVE-2026-25657

Mitre link : CVE-2026-25657

CVE.ORG link : CVE-2026-25657

JSON object : View

Products Affected

ericsson

packet_core_gateway

CWE

CWE-228

Improper Handling of Syntactically Invalid Structure

{"id": "CVE-2026-25657", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-25657", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-05T20:11:51.419993Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.8}], "cvssMetricV40": [{"type": "Secondary", "source": "85b1779b-6ecd-4f52-bcc5-73eac4659dcf", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 7.1, "Automatable": "NOT_DEFINED", "attackVector": "ADJACENT", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "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/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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "85b1779b-6ecd-4f52-bcc5-73eac4659dcf", "affectedData": [{"vendor": "Ericsson", "product": "Packet Core Gateway (PCG)", "versions": [{"status": "affected", "changes": [{"at": "1.30", "status": "unaffected"}], "version": "0", "lessThan": "1.30", "versionType": "1.30"}], "defaultStatus": "affected"}]}], "published": "2026-06-05T12:16:37.750", "references": [{"url": "https://www.ericsson.com/en/about-us/security/psirt/cve-2026-25657", "tags": ["Vendor Advisory"], "source": "85b1779b-6ecd-4f52-bcc5-73eac4659dcf"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "85b1779b-6ecd-4f52-bcc5-73eac4659dcf", "description": [{"lang": "en", "value": "CWE-228"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Versiones de Ericsson Packet Core Gateway (PCG) anteriores a la 1.30 contienen una vulnerabilidad de Manejo Inadecuado de Estructura Sint\u00e1cticamente Inv\u00e1lida (CWE-228) donde un atacante que env\u00eda continuamente un mensaje especialmente dise\u00f1ado puede causar degradaci\u00f3n del servicio. El impacto contin\u00faa mientras el ataque persista, pero el sistema se recupera de las ca\u00eddas cuando el ataque cesa."}], "lastModified": "2026-10-26T11:10:00.157", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:ericsson:packet_core_gateway:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A22CA693-31C9-4C56-B9F8-DF577769D499", "versionEndExcluding": "1.30"}], "operator": "OR"}]}], "sourceIdentifier": "85b1779b-6ecd-4f52-bcc5-73eac4659dcf"}