CVE-2021-1461

mediumpriority · track · 0EPSS 0.004 · 35 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.41% (35th) EPSS

CVSS 4.9 · medium

Is it mine?

86 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 Image Signature Verification feature of Cisco SD-WAN Software could allow an authenticated, remote attacker with Administrator-level credentials to install a malicious software patch on an affected device. The vulnerability is due to improper verification of digital signatures for patch images. An attacker could exploit this vulnerability by crafting an unsigned software patch to bypass signature checks and loading it on an affected device. A successful exploit could allow the attacker to boot a malicious software patch image.Cisco has released software updates that address the vulnerability described in this advisory. There are no workarounds that address this vulnerability.

remediations

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

A vendor fix is available.

FixedCisco Catalyst SD-WAN Managercisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
FixedCisco SD-WAN vEdge 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.

4.9

010

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

v3.14.9mediumAV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N/RL:X/RC:X/E:Xsecondary · ENISA EU

v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:Nsecondary · psirt@cisco.com USexploitability 1.2 · impact 3.6

v3.14.5mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:H/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-347USCWE-347US

affected products (86)

Products and version ranges known to be affected.

Cisco Cisco Catalyst SD-WAN Managerall versionscisco_csafUS
Cisco Cisco SD-WAN vEdge Routerall versionscisco_csafUS
Cisco Cisco Catalyst SD-WAN Manager≤ 18.3.1enisa_euvdEU
Cisco Cisco Catalyst SD-WAN Manager≤ 19.2.1enisa_euvdEU
Cisco Cisco Catalyst SD-WAN Manager≤ 18.4.302enisa_euvdEU
Cisco Cisco Catalyst SD-WAN Manager≤ 18.4.0enisa_euvdEU
Cisco Cisco Catalyst SD-WAN Manager≤ 19.2.097enisa_euvdEU
Cisco Cisco Catalyst SD-WAN Manager≤ 18.3.6enisa_euvdEU
Cisco Cisco Catalyst SD-WAN Manager≤ 18.4.3enisa_euvdEU
Cisco Cisco Catalyst SD-WAN Manager≤ 18.3.3.1enisa_euvdEU
Cisco Cisco Catalyst SD-WAN Manager≤ 18.4.0.1enisa_euvdEU
Cisco Cisco Catalyst SD-WAN Manager≤ 17.2.7enisa_euvdEU
Cisco Cisco Catalyst SD-WAN Manager≤ 18.3.4enisa_euvdEU
Cisco Cisco Catalyst SD-WAN Manager≤ 18.3.7enisa_euvdEU
Cisco Cisco Catalyst SD-WAN Manager≤ 17.2.5enisa_euvdEU
Cisco Cisco Catalyst SD-WAN Manager≤ 19.2.929enisa_euvdEU
Cisco Cisco Catalyst SD-WAN Manager≤ 19.2.098enisa_euvdEU
Cisco Cisco Catalyst SD-WAN Manager≤ 18.3.5enisa_euvdEU
Cisco Cisco Catalyst SD-WAN Manager≤ 18.4.1enisa_euvdEU
Cisco Cisco Catalyst SD-WAN Manager≤ 19.1.0enisa_euvdEU

showing 20 of 86

advisories (1)

Vendor and ecosystem advisories describing this.

cisco-sa-sdwan-sigverbypass-gPYXd6MkCisco SD-WAN Software Signature Verification Bypass Vulnerability2021-03-03csaf · cisco_csafUS
A vulnerability in the Image Signature Verification feature of Cisco SD-WAN Software could allow an authenticated, remote attacker with Administrator-level credentials to install a malicious software patch on an affected device. The vulnerability is due to improper verification of digital signatures for patch images. An attacker could exploit this vulnerability by crafting an unsigned software patch to bypass signature checks and loading it on an affected device. A successful exploit could allow the attacker to boot a malicious software patch image. Cisco has released software updates that address the vulnerability described in this advisory. There are no workarounds that address this vulnerability.

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 2024-11-18modified 2026-06-17

references (7)

External citations — patches, advisories, analysis.

scry

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