CVE-2017-10621

mediumpriority · track · 22EPSS 0.018 · 78 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.80% (78th) EPSS

CVSS 5 · medium

Is it mine?

20 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

A denial of service vulnerability in telnetd service on Juniper Networks Junos OS allows remote unauthenticated attackers to cause a denial of service. Affected Junos OS releases are: 12.1X46 prior to 12.1X46-D71; 12.3X48 prior to 12.3X48-D50; 14.1 prior to 14.1R8-S5, 14.1R9; 14.1X53 prior to 14.1X53-D50; 14.2 prior to 14.2R7-S9, 14.2R8; 15.1 prior to 15.1F2-S16, 15.1F5-S7, 15.1F6-S6, 15.1R5-S2, 15.1R6; 15.1X49 prior to 15.1X49-D90; 15.1X53 prior to 15.1X53-D47; 16.1 prior to 16.1R4-S1, 16.1R5; 16.2 prior to 16.2R1-S3, 16.2R2;

cvss

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

5.3

010

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

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

v3.05.3mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lprimary · NVD / NIST USexploitability 3.9 · impact 1.4

v3.05.3mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · ENISA EU

v3.05.3mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · sirt@juniper.net USexploitability 3.9 · impact 1.4

v3.04.9mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-400USprimary

affected products (20)

Products and version ranges known to be affected.

Juniper Networks Junos OS≤ 14.1 prior to 14.1R8-S5, 14.1R9enisa_euvdEU
Juniper Networks Junos OS≤ 15.1X49 prior to 15.1X49-D90enisa_euvdEU
Juniper Networks Junos OS≤ 16.2 prior to 16.2R1-S3, 16.2R2enisa_euvdEU
Juniper Networks Junos OS≤ 12.3X48 prior to 12.3X48-D50enisa_euvdEU
Juniper Networks Junos OS≤ 16.1 prior to 16.1R4-S1, 16.1R5enisa_euvdEU
Juniper Networks Junos OS≤ 14.1X53 prior to 14.1X53-D50enisa_euvdEU
Juniper Networks Junos OS≤ 15.1X53 prior to 15.1X53-D47enisa_euvdEU
Juniper Networks Junos OS≤ 14.2 prior to 14.2R7-S9, 14.2R8enisa_euvdEU
Juniper Networks Junos OS≤ 12.1X46 prior to 12.1X46-D71enisa_euvdEU
Juniper Networks Junos OS≤ 15.1 prior to 15.1F2-S16, 15.1F5-S7, 15.1F6-S6, 15.1R5-S2, 15.1R6enisa_euvdEU
juniper junos= 12.1x45nvdUScpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
juniper junos= 12.3x48nvdUScpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
juniper junos= 14.1nvdUScpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
juniper junos= 14.1x53nvdUScpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
juniper junos= 14.2nvdUScpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
juniper junos= 15.1nvdUScpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
juniper junos= 15.1x49nvdUScpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
juniper junos= 15.1x53nvdUScpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
juniper junos= 16.1nvdUScpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
juniper junos= 16.2nvdUScpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*

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 2017-10-13modified 2026-06-17

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+9607 more

references (4)

External citations — patches, advisories, analysis.

https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10817&actp=METADATAPatchcnnvd
https://kb.juniper.net/JSA10817 cnnvd
https://kb.juniper.net/JSA10817 enisa_euvd
https://kb.juniper.net/JSA10817MitigationVendor Advisorynvd

scry

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