CVE-2020-29299

highpriority · track · 30EPSS 0.024 · 84 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

2.37% (84th) EPSS

CVSS 9 · high

Is it mine?

7 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-28

Certain Zyxel products allow command injection by an admin via an input string to chg_exp_pwd during a password-change action. This affects VPN On-premise before ZLD V4.39 week38, VPN Orchestrator before SD-OS V10.03 week32, USG before ZLD V4.39 week38, USG FLEX before ZLD V4.55 week38, ATP before ZLD V4.55 week38, and NSG before 1.33 patch 4.

cvss

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

9.0

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.6–9

v2.09highAV:N/AC:L/Au:S/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 8 · impact 10

v3.17.2highCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.2 · impact 5.9

v3.16.6mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-77USprimary

affected products (7)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
zyxel nsg firmware< 1.33nvdUScpe:2.3:o:zyxel:nsg_firmware:*:*:*:*:*:*:*:*
zyxel nsg firmware= 1.33nvdUScpe:2.3:o:zyxel:nsg_firmware:*:*:*:*:*:*:*:*
zyxel usg flex firmwareall versionsnvdUScpe:2.3:o:zyxel:usg_flex_firmware:*:*:*:*:*:*:*:*
zyxel vpn orchestrator< 10.03nvdUScpe:2.3:o:zyxel:vpn_orchestrator:*:*:*:*:*:*:*:*
zyxel zld< 4.39nvdUScpe:2.3:o:zyxel:zld:*:*:*:*:*:*:*:*
zyxel zld< 4.55nvdUScpe:2.3:o:zyxel:zld:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2020-12-27modified 2026-06-17

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+4594 more

references (7)

External citations — patches, advisories, analysis.

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