CVE-2019-20047: An issue was discovered on Alcatel-Lucent OmniVista 4760 devices, and 8770 devices before 4.1.2

Q: How do I fix CVE-2019-20047?

omnivista 4760: mitigate or apply the listed mitigation; omnivista 8770: upgrade to 4.1.12. Exact commands for each OS are on this page.

Q: Is CVE-2019-20047 being exploited?

CVE-2019-20047 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2019-20047 affect?

CVE-2019-20047 affects omnivista 4760, omnivista 8770. Severity is high (CVSS 7.5). An issue was discovered on Alcatel-Lucent OmniVista 4760 devices, and 8770 devices before 4.1.2. An incorrect web server configuration allows a remote unauthenticated attacker to retrieve the content of its own session files. Every session

Q: How urgent is CVE-2019-20047?

Priority 58/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEMITIGATEUPGRADE

CVE-2019-20047 is a high-severity flaw (CVSS 7.5) affecting omnivista 4760, omnivista 8770. 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, and 8770 devices before 4.1.2. An incorrect web server configuration allows a remote unauthenticated attacker to retrieve the content of its own session files. Every session file contains the administrative LDAP credentials encoded in a reversible format. Sessions are stored in /sessions/sess_<sessionid>.

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	2.7% (top 14%)
CISA exploited list	No
Weakness	CWE-522
Published	2019-12-27
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: al-enterprise

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

Am I affected?

Timeline

2019-12-27 19:15 UTCPublished CVE record published
2026-06-17 02:29 UTCUpdated Record last modified

al-enterprise omnivista 4760 MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy omnivista-4760 || rpm -q omnivista-4760 || omnivista-4760 --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

al-enterprise omnivista 8770 UPGRADE

Affected: < 4.1.12

Fixed in: 4.1.12

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy omnivista-8770 || rpm -q omnivista-8770 || omnivista-8770 --version

2. UPGRADE to 4.1.12 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade omnivista-8770

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade omnivista-8770

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2019-20047?

omnivista 4760: mitigate or apply the listed mitigation; omnivista 8770: upgrade to 4.1.12. Exact commands for each OS are on this page.

Is CVE-2019-20047 being exploited?

CVE-2019-20047 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-2019-20047 affect?

CVE-2019-20047 affects omnivista 4760, omnivista 8770. Severity is high (CVSS 7.5). An issue was discovered on Alcatel-Lucent OmniVista 4760 devices, and 8770 devices before 4.1.2. An incorrect web server configuration allows a remote unauthenticated attacker to retrieve the content of its own session files. Every session

How urgent is CVE-2019-20047?

Priority 58/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2019-20049 CRITICAL 9.8 MITIGATE An issue was discovered on Alcatel-Lucent OmniVista 4760 devices

References

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