CVE-2023-41627: O-RAN Software Community ric-plt-lib-rmr v4.9.0 does not validate the source of the routing tables it receives

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HIGH 7.5REMOTEDOWNGRADE

CVE-2023-41627 is a high-severity flaw (CVSS 7.5) affecting ric message router. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

O-RAN Software Community ric-plt-lib-rmr v4.9.0 does not validate the source of the routing tables it receives, potentially allowing attackers to send forged routing tables to the device.

Why this priority

High severity
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 27%)
CISA exploited list	No
Published	2023-09-01
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: o-ran-sc

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

Am I affected?

Timeline

2023-09-01 17:15 UTCPublished CVE record published
2026-06-17 06:22 UTCUpdated Record last modified

o-ran-sc ric message router DOWNGRADE

Affected: 4.9.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.9.0

1. Check installed version

apt-cache policy ric-message-router || rpm -q ric-message-router || ric-message-router --version

2. No fixed release: DOWNGRADE to a release before 4.9.0 (Debian / Ubuntu)

apt-cache madison ric-message-router sudo apt install ric-message-router=<VERSION_BEFORE_4.9.0> sudo apt-mark hold ric-message-router

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

dnf --showduplicates list ric-message-router sudo dnf downgrade ric-message-router-<VERSION_BEFORE_4.9.0> sudo dnf versionlock add ric-message-router

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-2023-41627?

ric message router: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-41627 being exploited?

CVE-2023-41627 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-2023-41627 affect?

CVE-2023-41627 affects ric message router. Severity is high (CVSS 7.5). O-RAN Software Community ric-plt-lib-rmr v4.9.0 does not validate the source of the routing tables it receives, potentially allowing attackers to send forged routing tables to the device.

How urgent is CVE-2023-41627?

Priority 50/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2023-40998 HIGH 7.5 DOWNGRADE Buffer Overflow vulnerability in O-RAN Software Community ric-plt-lib-rmr v.4.9.0 allows a remote attacker to
CVE-2023-40997 HIGH 7.5 DOWNGRADE Buffer Overflow vulnerability in O-RAN Software Community ric-plt-lib-rmr v.4.9.0 allows a remote attacker to

References

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