CVE-2019-15801

mediumpriority · track · 31OT risk · elevatedEPSS 0.015 · 74 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.49% (74th) 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. The firmware image contains encrypted passwords that are used to authenticate users wishing to access a diagnostics or password-recovery menu. Using the hardcoded cryptographic key found elsewhere in the firmware, these passwords can be decrypted. This is related to fds_sys_passDebugPasswd_ret() and fds_sys_passRecoveryPasswd_ret() in libfds.so.0.0.

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:P/I:N/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:H/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

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

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

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-798USprimaryCWE-522US

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

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+2276 more

references (7)

External citations — patches, advisories, analysis.

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