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CVE-2023-33477: In Harmonic NSG 9000-6G devices, an authenticated remote user can obtain source code by directly requesting a

38
Routine
MEDIUM 6.5MITIGATE

CVE-2023-33477 is a medium-severity flaw (CVSS 6.5) affecting nsg 9000-6g firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Harmonic NSG 9000-6G devices, an authenticated remote user can obtain source code by directly requesting a special path.

Why this priority

  • No elevated risk signals yet

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

Risk facts

CVSS score6.5 (Medium)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededLow
User interactionNone
EPSS exploit chance1.0% (top 38%)
CISA exploited listNo
WeaknessCWE-862
Published2023-06-06
Last modified2026-06-17
Publisher (CNA): MITRE · Vendor: harmonicinc

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

Am I affected?

Timeline

harmonicinc nsg 9000-6g firmware MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
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-2023-33477?

nsg 9000-6g firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-33477 being exploited?

CVE-2023-33477 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-2023-33477 affect?

CVE-2023-33477 affects nsg 9000-6g firmware. Severity is medium (CVSS 6.5). In Harmonic NSG 9000-6G devices, an authenticated remote user can obtain source code by directly requesting a special path.

How urgent is CVE-2023-33477?

Priority 38/100. No elevated risk signals yet.

References

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