CVE-2020-9015Public exploitNetwork attack vector

Command restriction bypass via pipe metacharacter

Published Feb 20, 2020 · Updated Aug 4, 2024

Shell-restriction bypass on Arista DCS switches allows remote authenticated users to run prohibited commands through TACACS+ authorization. On DCS-7050QX-32S-R 4.20.9M, DCS-7050CX3-32S-R 4.20.11M, and DCS-7280SRAM-48C6-R 4.22.0.1F, an overly permissive TACACS+ permitted-command regular expression accepts a pipe character that chains a restricted command. A valid shell account and the permissive server policy are required; Arista disputes a product flaw and attributes the behavior to TACACS+ configuration.

CVSS severity9.8
Critical
EPSS probability16.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Shell-restriction bypass on Arista DCS switches allows remote authenticated users to run prohibited commands through TACACS+ authorization. On DCS-7050QX-32S-R 4.20.9M, DCS-7050CX3-32S-R 4.20.11M, and DCS-7280SRAM-48C6-R 4.22.0.1F, an overly permissive TACACS+ permitted-command regular expression accepts a pipe character that chains a restricted command. A valid shell account and the permissive server policy are required; Arista disputes a product flaw and attributes the behavior to TACACS+ configuration.

The record

CVE
CVE-2020-9015
Published
Feb 20, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 20, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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