CVE-2021-1436

mediumpriority · track · 18EPSS 0.003 · 25 %ileEURUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.32% (25th) EPSS
CVSS 4.7 · medium
Is it mine?
75 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 CLI of Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker to conduct path traversal attacks and obtain read access to sensitive files on an affected system. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted request to an affected system. A successful exploit could allow the attacker to view arbitrary files on the affected system.

01

remediations

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

A vendor fix is available.

02

cvss

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

4.7
010

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

v2.04.7mediumAV:L/AC:M/Au:N/C:C/I:N/A:Nprimary · NVD / NIST USexploitability 3.4 · impact 6.9
v3.14.4mediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 0.8 · impact 3.6
v3.14.4mediumAV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:Nsecondary · FSTEC (BDU) RU
v3.14.4mediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:Nsecondary · ENISA EU
v3.14.4mediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:Nsecondary · psirt@cisco.com USexploitability 0.8 · impact 3.6
v3.14.1mediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)
v3.14.4mediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:Nsecondary · Cisco PSIRT US
03

ssvc

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

Trackcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-22USCWE-22US
05

affected products (75)

Products and version ranges known to be affected.

showing 20 of 75
06

advisories (1)

Vendor and ecosystem advisories describing this.

  • cisco-sa-iosxe-sdwpathtrav-nsrue2MtCisco IOS XE SD-WAN Software Path Traversal Vulnerability2021-03-24csaf · cisco_csafUS

    A vulnerability in the CLI of Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker to conduct path traversal attacks and obtain read access to sensitive files on an affected system. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted request to an affected system. A successful exploit could allow the attacker to view arbitrary files on the affected system. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

07

also known as (4)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducisco_csafNVDCVE.orgMITRE
published 2021-03-24modified 2026-06-17
09

references (5)

External citations — patches, advisories, analysis.

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