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No exploitation reportedFix available

CVE-2019-15799

No exploitation reported by the sources we read.

  • Published2019-11-14
  • Fixed in2.50\(aazi.0\)c0
  • WeaknessCWE-269

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. User accounts created through the web interface of the device, when given non-admin level privileges, have the same level of privileged access as administrators when connecting to the device via SSH (while their permissions via the web interface are in fact restricted). This allows normal users to obtain the administrative password by running the tech-support command via the CLI: this contains the encrypted passwords for all users on the device. As these passwords are encrypted using well-known and static parameters, they can be decrypted and the original passwords (including the administrator password) can be obtained.

Timeline

dates in UTC
  1. 2019-11-1421:15CVE publishedNVD

Versions per branch

NVD
Zyxel gs1900-10hp firmwareversion to verify
BranchAffectedFixed in
2.50< 2.50\(aazi.0\)c02.50\(aazi.0\)c0
Zyxel gs1900-16 firmwareversion to verify
BranchAffectedFixed in
2.50< 2.50\(aahj.0\)c02.50\(aahj.0\)c0
Zyxel gs1900-24 firmwareversion to verify
BranchAffectedFixed in
2.50< 2.50\(aahl.0\)c02.50\(aahl.0\)c0

6 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Zyxel gs1900-10hp firmware to 2.50\(aazi.0\)c0

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2019-11-14
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-fvpf-4m7h-jg3p

Frequently asked questions

What is CVE-2019-15799?

An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. User accounts created through the web interface of the device, when given non-admin level privileges, have the same level of privileged access as administrators when connecting to the device via SSH (while their permissions via the web interface are in fact restricted). This allows normal users to obtain the administrative password by running the tech-support command via the CLI: this contains the encrypted passwords for all users on the device. As these passwords are encrypted using well-known and static parameters, they can be decrypted and the original passwords (including the administrator password) can be obtained.

Is CVE-2019-15799 actively exploited?

Active exploitation of CVE-2019-15799 has not been confirmed. Its EPSS score was 2.3% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-15799?

CVE-2019-15799 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record