CVE-2019-15804

mediumpriority · track · 30EPSS 0.009 · 60 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.93% (60th) EPSS

CVSS 5 · medium

Is it mine?

19 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. By sending a signal to the CLI process, undocumented functionality is triggered. Specifically, a menu can be triggered by sending the SIGQUIT signal to the CLI application (e.g., through CTRL+\ via SSH). The access control check for this menu does work and prohibits accessing the menu, which contains "Password recovery for specific user" options. The menu is believed to be accessible using a serial console.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20US

affected products (19)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
Zyxel Communications Corp. GS1900-10HP≤ 2.50(AAZI.0)C0fstec_bduRU
Zyxel Communications Corp. GS1900-16≤ 2.50(AAHJ.0)C0fstec_bduRU
Zyxel Communications Corp. GS1900-24≤ 2.50(AAHL.0)C0fstec_bduRU
Zyxel Communications Corp. GS1900-24E≤ 2.50(AAHK.0)C0fstec_bduRU
Zyxel Communications Corp. GS1900-24HP≤ 2.50(AAHM.0)C0fstec_bduRU
Zyxel Communications Corp. GS1900-48≤ 2.50(AAHN.0)C0fstec_bduRU
Zyxel Communications Corp. GS1900-48HP≤ 2.50(AAHO.0)C0fstec_bduRU
Zyxel Communications Corp. GS1900-8≤ 2.50(AAHH.0)C0fstec_bduRU
Zyxel Communications Corp. GS1900-8HP≤ 2.50(AAHI.0)C0fstec_bduRU
zyxel gs1900-10hp firmware< 2.50\(aazi.0\)c0nvdUScpe:2.3:o:zyxel:gs1900-10hp_firmware:*:*:*:*:*:*:*:*
zyxel gs1900-16 firmware< 2.50\(aahj.0\)c0nvdUScpe:2.3:o:zyxel:gs1900-16_firmware:*:*:*:*:*:*:*:*
zyxel gs1900-24 firmware< 2.50\(aahl.0\)c0nvdUScpe:2.3:o:zyxel:gs1900-24_firmware:*:*:*:*:*:*:*:*
zyxel gs1900-24e firmware< 2.50\(aahk.0\)c0nvdUScpe:2.3:o:zyxel:gs1900-24e_firmware:*:*:*:*:*:*:*:*
zyxel gs1900-24hp firmware< 2.50\(aahm.0\)c0nvdUScpe:2.3:o:zyxel:gs1900-24hp_firmware:*:*:*:*:*:*:*:*
zyxel gs1900-48 firmware< 2.50\(aahn.0\)c0nvdUScpe:2.3:o:zyxel:gs1900-48_firmware:*:*:*:*:*:*:*:*
zyxel gs1900-48hp firmware< 2.50\(aaho.0\)c0nvdUScpe:2.3:o:zyxel:gs1900-48hp_firmware:*:*:*:*:*:*:*:*
zyxel gs1900-8 firmware< 2.50\(aahh.0\)c0nvdUScpe:2.3:o:zyxel:gs1900-8_firmware:*:*:*:*:*:*:*:*
zyxel gs1900-8hp firmware< 2.50\(aahi.0\)c0nvdUScpe:2.3:o:zyxel:gs1900-8hp_firmware:*:*:*:*:*:*:*:*

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2019-11-14modified 2026-06-17

references (7)

External citations — patches, advisories, analysis.

scry

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