PatchTheCVECVE-2023-7227: SystemK NVR 504/508/516 versions 2.3.5SK.30084998 and prior are vulnerable to a command injection vulnerabili
CVE-2023-7227 is a critical-severity flaw (CVSS 9.8) affecting nvr 504 firmware, nvr 508 firmware, nvr 516 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
SystemK NVR 504/508/516 versions 2.3.5SK.30084998 and prior are vulnerable to a command injection vulnerability in the dynamic domain name system (DDNS) settings that could allow an attacker to execute arbitrary commands with root privileges.
Why this priority
- Critical severity
- Remotely exploitable, no login, no user action
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.3% (top 30%) |
| CISA exploited list | No |
| Weakness | CWE-77 |
| Published | 2024-01-25 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
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-2023-7227?
nvr 504 firmware: mitigate or apply the listed mitigation; nvr 508 firmware: mitigate or apply the listed mitigation; nvr 516 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2023-7227 being exploited?
CVE-2023-7227 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-2023-7227 affect?
CVE-2023-7227 affects nvr 504 firmware, nvr 508 firmware, nvr 516 firmware. Severity is critical (CVSS 9.8). SystemK NVR 504/508/516 versions 2.3.5SK.30084998 and prior are vulnerable to a command injection vulnerability in the dynamic domain name system (DDNS) settings that could allow an attacker to execute arbitrary commands with root privileg
How urgent is CVE-2023-7227?
Priority 57/100. Critical severity; Remotely exploitable, no login, no user action