CVE-2021-1612

mediumpriority · track · 28EPSS 0.003 · 16 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.25% (16th) EPSS

CVSS 6.6 · medium

Is it mine?

48 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cisco_csaf

EPSS · scored 2026-10-27

A vulnerability in the Cisco IOS XE SD-WAN Software CLI could allow an authenticated, local attacker to overwrite arbitrary files on the local system. This vulnerability is due to improper access controls on files within the local file system. An attacker could exploit this vulnerability by placing a symbolic link in a specific location on the local file system. A successful exploit could allow the attacker to overwrite arbitrary files on an affected device.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedCisco IOS XE Catalyst SD-WAN 16.12.1b when installed on Cisco 1000 Series Integrated Services Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.1b when installed on Cisco 4000 Series Integrated Services Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.1b when installed on Cisco ASR 1000 Series Aggregation Services Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.1b when installed on Cisco Catalyst IR1100 Rugged Series Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.1b when installed on Cisco Cloud Services Router 1000V Seriescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.1b when installed on Cisco Integrated Services Virtual Routercisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.1d when installed on Cisco 1000 Series Integrated Services Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.1d when installed on Cisco 4000 Series Integrated Services Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.1d when installed on Cisco ASR 1000 Series Aggregation Services Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.1d when installed on Cisco Catalyst IR1100 Rugged Series Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.1d when installed on Cisco Cloud Services Router 1000V Seriescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.1d when installed on Cisco Integrated Services Virtual Routercisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.1e when installed on Cisco 1000 Series Integrated Services Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.1e when installed on Cisco 4000 Series Integrated Services Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.1e when installed on Cisco ASR 1000 Series Aggregation Services Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.1e when installed on Cisco Catalyst IR1100 Rugged Series Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.1e when installed on Cisco Cloud Services Router 1000V Seriescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.1e when installed on Cisco Integrated Services Virtual Routercisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.2r when installed on Cisco 1000 Series Integrated Services Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.2r when installed on Cisco 4000 Series Integrated Services Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.2r when installed on Cisco ASR 1000 Series Aggregation Services Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.2r when installed on Cisco Catalyst IR1100 Rugged Series Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.2r when installed on Cisco Cloud Services Router 1000V Seriescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.2r when installed on Cisco Integrated Services Virtual Routercisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.3 when installed on Cisco 1000 Series Integrated Services Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.3 when installed on Cisco 4000 Series Integrated Services Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.3 when installed on Cisco ASR 1000 Series Aggregation Services Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.3 when installed on Cisco Catalyst IR1100 Rugged Series Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.3 when installed on Cisco Cloud Services Router 1000V Seriescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.3 when installed on Cisco Integrated Services Virtual Routercisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.4 when installed on Cisco 1000 Series Integrated Services Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.4 when installed on Cisco 4000 Series Integrated Services Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.4 when installed on Cisco ASR 1000 Series Aggregation Services Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.4 when installed on Cisco Catalyst IR1100 Rugged Series Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.4 when installed on Cisco Cloud Services Router 1000V Seriescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.4 when installed on Cisco Integrated Services Virtual Routercisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.4a when installed on Cisco 4000 Series Integrated Services Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.4a when installed on Cisco Cloud Services Router 1000V Seriescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.4a when installed on Cisco Integrated Services Virtual Routercisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.5 when installed on Cisco 1000 Series Integrated Services Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.5 when installed on Cisco 4000 Series Integrated Services Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.5 when installed on Cisco ASR 1000 Series Aggregation Services Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.5 when installed on Cisco Catalyst IR1100 Rugged Series Routerscisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.5 when installed on Cisco Cloud Services Router 1000V Seriescisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco IOS XE Catalyst SD-WAN 16.12.5 when installed on Cisco Integrated Services Virtual Routercisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com

cvss

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

7.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.5–7.1

v2.06.6mediumAV:L/AC:L/Au:N/C:N/I:C/A:Cprimary · NVD / NIST USexploitability 3.9 · impact 9.2

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.2

v3.15.5mediumAV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:Nsecondary · ENISA EU

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:Nsecondary · psirt@cisco.com USexploitability 1.8 · impact 3.6

v3.16.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:Nsecondary · Cisco PSIRT US

ssvc

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

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-59USprimaryCWE-59USCWE-61USCWE-61US

affected products (48)

Products and version ranges known to be affected.

showing 20 of 48

advisories (1)

Vendor and ecosystem advisories describing this.

cisco-sa-sd-wan-GjR5pGOmCisco IOS XE SD-WAN Software Arbitrary File Overwrite Vulnerability2021-09-22csaf · cisco_csafUS
A vulnerability in the Cisco IOS XE SD-WAN Software CLI could allow an authenticated, local attacker to overwrite arbitrary files on the local system. This vulnerability is due to improper access controls on files within the local file system. An attacker could exploit this vulnerability by placing a symbolic link in a specific location on the local file system. A successful exploit could allow the attacker to overwrite arbitrary files on an affected device. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is part of the September 2021 release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: September 2021 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication. ["https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74581"]

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cisco_csaf NVD CVE.org MITRE

published 2021-09-23modified 2026-06-17

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+2367 more

references (7)

External citations — patches, advisories, analysis.

scry

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