CVE-2023-27989

mediumpriority · track · 26EPSS 0.010 · 63 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.02% (63rd) EPSS

CVSS 6.5 · medium

Is it mine?

9 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

A buffer overflow vulnerability in the CGI program of the Zyxel NR7101 firmware versions prior to V1.00(ABUV.8)C0 could allow a remote authenticated attacker to cause denial of service (DoS) conditions by sending a crafted HTTP request to a vulnerable device.

cvss

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

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v3.16.5mediumAV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · security@zyxel.com.twexploitability 2.8 · impact 3.6

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-120USprimaryCWE-120US

affected products (9)

Products and version ranges known to be affected.

Zyxel NR7101 firmware≤ < V1.00(ABUV.8)C0enisa_euvdEU
Zyxel Communications Corp. LTE7480-M804≤ 1.00(ABRA.6)C0fstec_bduRU
Zyxel Communications Corp. LTE7490-M904≤ 1.00(ABQY.5)C0fstec_bduRU
Zyxel Communications Corp. NR7101≤ 1.00(ABUV.7)C0fstec_bduRU
Zyxel Communications Corp. Nebula NR7101≤ 1.15(ACCC.3)C0fstec_bduRU
zyxel lte7480-m804 firmware≤ 1.00\(abra.6\)c0nvdUScpe:2.3:o:zyxel:lte7480-m804_firmware:*:*:*:*:*:*:*:*
zyxel lte7490-m904 firmware≤ 1.00\(abqy.5\)c0nvdUScpe:2.3:o:zyxel:lte7490-m904_firmware:*:*:*:*:*:*:*:*
zyxel nebula nr7101 firmware≤ 1.15\(accc.3\)c0nvdUScpe:2.3:o:zyxel:nebula_nr7101_firmware:*:*:*:*:*:*:*:*
zyxel nr7101 firmware≤ 1.00\(abuv.7\)c0nvdUScpe:2.3:o:zyxel:nr7101_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 2023-06-05modified 2026-06-17

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+5664 more

references (4)

External citations — patches, advisories, analysis.

scry

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