CVE-2026-25657: Ericsson Packet Core Gateway (PCG) versions prior to 1.30 contain an Improper Handling of Syntactically Invali

Q: How do I fix CVE-2026-25657?

packet core gateway: upgrade to 1.30. Exact commands for each OS are on this page.

Q: Is CVE-2026-25657 being exploited?

CVE-2026-25657 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-25657 affect?

CVE-2026-25657 affects packet core gateway. Severity is medium (CVSS 6.5). 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 degradati

Q: How urgent is CVE-2026-25657?

Priority 24/100. No elevated risk signals yet.

Routine

MEDIUM 6.5UPGRADE

CVE-2026-25657 is a medium-severity flaw (CVSS 6.5) affecting packet core gateway. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 94%)
CISA exploited list	No
Weakness	CWE-228
Published	2026-06-05
Last modified	2026-10-26

Publisher (CNA): Ericsson · Vendor: ericsson

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-05 12:16 UTCPublished CVE record published
2026-10-26 11:10 UTCUpdated Record last modified

ericsson packet core gateway UPGRADE

Affected: < 1.30

Fixed in: 1.30

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy packet-core-gateway || rpm -q packet-core-gateway || packet-core-gateway --version

2. UPGRADE to 1.30 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade packet-core-gateway

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade packet-core-gateway

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-25657?

packet core gateway: upgrade to 1.30. Exact commands for each OS are on this page.

Is CVE-2026-25657 being exploited?

CVE-2026-25657 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-25657 affect?

CVE-2026-25657 affects packet core gateway. Severity is medium (CVSS 6.5). 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 degradati

How urgent is CVE-2026-25657?

Priority 24/100. No elevated risk signals yet.

Software pages

Ericsson vulnerabilities

Related CVEs

CVE-2026-25658 MEDIUM 6.5 UPGRADE Ericsson Packet Core Gateway (PCG) versions prior to 1.30 contain an Improper Handling of Missing Values (CWE-
CVE-2026-25659 MEDIUM 6.5 UPGRADE Ericsson Packet Core Gateway (PCG) versions prior to 1.30 contain an Improper Handling of Missing Values (CWE-

References

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