PatchTheCVECVE-2019-20049: An issue was discovered on Alcatel-Lucent OmniVista 4760 devices
CVE-2019-20049 is a critical-severity flaw (CVSS 9.8) affecting omnivista 4760. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
An issue was discovered on Alcatel-Lucent OmniVista 4760 devices. A remote unauthenticated attacker can chain a directory traversal (which helps to bypass authentication) with an insecure file upload to achieve Remote Code Execution as SYSTEM. The directory traversal is in the __construct() whereas the insecure file upload is in SetSkinImages().
Why this priority
- Critical severity
- EPSS top 4%: very likely to be exploited
- Public exploit reference
- 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 | 12.8% (top 4%) |
| CISA exploited list | No |
| Published | 2019-12-27 |
| 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-2019-20049?
omnivista 4760: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2019-20049 being exploited?
CVE-2019-20049 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-2019-20049 affect?
CVE-2019-20049 affects omnivista 4760. Severity is critical (CVSS 9.8). An issue was discovered on Alcatel-Lucent OmniVista 4760 devices. A remote unauthenticated attacker can chain a directory traversal (which helps to bypass authentication) with an insecure file upload to achieve Remote Code Execution as SYST
How urgent is CVE-2019-20049?
Priority 68/100. Critical severity; EPSS top 4%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action
Related CVEs
- CVE-2019-20047 HIGH 7.5 MITIGATE UPGRADE An issue was discovered on Alcatel-Lucent OmniVista 4760 devices, and 8770 devices before 4.1.2