PatchTheCVECVE-2019-12223: An issue was discovered in NVR WebViewer on Hanwah Techwin SRN-472s 1.07_190502 devices, and other SRN-x devic
CVE-2019-12223 is a high-severity flaw (CVSS 7.5) affecting srn-472s firmware, srn-873s firmware, srn-1673s firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
An issue was discovered in NVR WebViewer on Hanwah Techwin SRN-472s 1.07_190502 devices, and other SRN-x devices before 2019-05-03. A system crash and reboot can be achieved by submitting a long username in excess of 117 characters. The username triggers a buffer overflow in the main process controlling operation of the DVR system, rendering services unavailable during the reboot operation. A repeated attack affects availability as long as the at
Why this priority
- High severity
- Public exploit reference
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 2.4% (top 16%) |
| CISA exploited list | No |
| Weakness | CWE-119 |
| Published | 2019-09-05 |
| 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-2019-12223?
srn-472s firmware: mitigate or apply the listed mitigation; srn-873s firmware: upgrade to 2019-05-03; srn-1673s firmware: upgrade to 2019-05-03. Exact commands for each OS are on this page.
Is CVE-2019-12223 being exploited?
CVE-2019-12223 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-2019-12223 affect?
CVE-2019-12223 affects srn-472s firmware, srn-873s firmware, srn-1673s firmware. Severity is high (CVSS 7.5). An issue was discovered in NVR WebViewer on Hanwah Techwin SRN-472s 1.07_190502 devices, and other SRN-x devices before 2019-05-03. A system crash and reboot can be achieved by submitting a long username in excess of 117 characters. The use
How urgent is CVE-2019-12223?
Priority 57/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action