CVE-2023-6631: PowerSYSTEM Center versions 2020 Update 16 and prior contain a vulnerability that may allow an authorized loca

Routine

HIGH 7.8DOWNGRADE

CVE-2023-6631 is a high-severity flaw (CVSS 7.8) affecting powersystem center. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

PowerSYSTEM Center versions 2020 Update 16 and prior contain a vulnerability that may allow an authorized local user to insert arbitrary code into the unquoted service path and escalate privileges.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 93%)
CISA exploited list	No
Weakness	CWE-428
Published	2024-01-08
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: subnet

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-01-08 19:15 UTCPublished CVE record published
2026-06-17 06:51 UTCUpdated Record last modified

subnet powersystem center DOWNGRADE

Affected: 2020

Fixed in: no fixed release known

Safe to downgrade to: a release before 2020

1. Check installed version

apt-cache policy powersystem-center || rpm -q powersystem-center || powersystem-center --version

2. No fixed release: DOWNGRADE to a release before 2020 (Debian / Ubuntu)

apt-cache madison powersystem-center sudo apt install powersystem-center=<VERSION_BEFORE_2020> sudo apt-mark hold powersystem-center

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list powersystem-center sudo dnf downgrade powersystem-center-<VERSION_BEFORE_2020> sudo dnf versionlock add powersystem-center

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2023-6631?

powersystem center: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-6631 being exploited?

CVE-2023-6631 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-2023-6631 affect?

CVE-2023-6631 affects powersystem center. Severity is high (CVSS 7.8). PowerSYSTEM Center versions 2020 Update 16 and prior contain a vulnerability that may allow an authorized local user to insert arbitrary code into the unquoted service path and escalate privileges.

How urgent is CVE-2023-6631?

Priority 29/100. High severity

References

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