CASCACascade Atlas

Evidence dossier

CVE-2026-20262

Cisco Catalyst SD-WAN Manager Arbitrary File Write Vulnerability

61.8–76.8Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an authenticated, remote attacker to create a file or overwrite any file on the filesystem of an affected system. This vulnerability exists because the affected software does not properly validate user-supplied input during a file upload process. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected API endpoint of the affected system. A successful exploit could allow the attacker to create or overwrite any file on the underlying operating system. This file could later be used to elevate to root. To exploit this vulnerability, the attacker must have valid credentials with at least a lower-privileged, single-task user account.

State
PUBLISHED
Published
Jun 15, 2026
Updated
Jun 17, 2026
Evidence coverage
85%
CISA KEVCatalog member

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

FIRST EPSS7.68%

2026-07-18 · v2026.06.15 · percentile 93.9%

Source stateNo scored conflict

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

CISA-ADPindependent enrichment
container

CISA ADP Vulnrichment

ciscooriginal assertion
container

Cisco Catalyst SD-WAN Manager Arbitrary File Write Vulnerability

CISA KEVoriginal assertion
observed_exploitation

Cisco Catalyst SD-WAN Manager Directory or Path Traversal Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.076830000000; percentile 0.939220000000

Applicability

Cited product scope

Trace impact →
CiscoCisco Catalyst SD-WAN Manager
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"20.10.1"}, {"status": "affected", "version": "20.6.3.0.33"}, {"status": "affected", "version": "20.9.2.0.01"}, {"status": "affected", "version": "20.9.1_LI_Images"}, {"status": "affected", "version": "20.10.1_LI_Images"}, {"status": "affected", "version": "20.9.2_LI_Images"}, {"status": "affected", "version": "20.3.7"}, {"status": "affected", "version": "20.9.3"}, {"status": "affected", "version": "20.6.5.1"}, {"status": "affected", "version": "20.11.1"}, {"status": "affected", "version": "20.11.1_LI_Images"}, {"status": "affected", "version": "20.9.3_LI_ Images"}, {"status": "affected", "version": "20.6.3.1.1"}, {"status": "affected", "version": "20.9.3.0.2"}, {"status": "affected", "version": "20.6.5.1.2"}, {"status": "affected", "version": "20.9.3.0.3"}, {"status": "affected", "version": "20.4.2.3"}, {"status": "affected", "version": "20.6.3.2"}, {"status": "affected", "version": "20.6.4.1"}, {"status": "affected", "version": "20.6.3.0.38"}, {"status": "affected", "version": 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"version": "20.6.5.2.8"}, {"status": "affected", "version": "20.9.4.1"}, {"status": "affected", "version": "20.9.4.1_LI_Images"}, {"status": "affected", "version": "20.9.3.0.25"}, {"status": "affected", "version": "20.9.3.0.24"}, {"status": "affected", "version": "20.6.5.1.14"}, {"status": "affected", "version": "20.3.8"}, {"status": "affected", "version": "20.6.6"}, {"status": "affected", "version": "20.9.3.0.26"}, {"status": "affected", "version": "20.6.3.0.51"}, {"status": "affected", "version": "20.9.3.0.29"}, {"status": "affected", "version": "20.12.2"}, {"status": "affected", "version": "20.12.2_LI_Images"}, {"status": "affected", "version": "20.6.6.0.1"}, {"status": "affected", "version": "20.13.1_LI_Images"}, {"status": "affected", "version": "20.9.4.0.4"}, {"status": "affected", "version": "20.13.1"}, {"status": "affected", "version": "20.9.4.1.1"}, {"status": "affected", "version": "20.9.5"}, {"status": "affected", "version": "20.9.5_LI_Images"}, {"status": "affected", "version": "20.12.3_LI_Images"}, {"status": "affected", "version": "20.12.3"}, {"status": "affected", "version": "20.9.4.1.3"}, {"status": "affected", "version": "20.6.7"}, {"status": "affected", "version": "20.9.5.1"}, {"status": "affected", "version": "20.9.5.1_LI_Images"}, {"status": "affected", "version": "20.9.4.1.6"}, {"status": "affected", "version": "20.14.1"}, {"status": "affected", "version": "20.14.1_LI_Images"}, {"status": "affected", "version": "20.9.5.2"}, {"status": "affected", "version": "20.9.5.2.1"}, {"status": "affected", "version": "20.9.5.2_LI_Images"}, {"status": "affected", "version": "20.12.3.1"}, {"status": "affected", "version": "20.12.4"}, {"status": "affected", "version": "20.15.1_LI_Images"}, {"status": "affected", "version": "20.15.1"}, {"status": "affected", "version": "20.9.5.1.4"}, {"status": "affected", "version": "20.9.5.2.7"}, {"status": "affected", "version": "20.9.5.2.13"}, {"status": "affected", "version": "20.9.6"}, {"status": "affected", "version": "20.9.6_LI_Images"}, {"status": "affected", "version": "20.9.5.2.14"}, {"status": "affected", "version": "20.6.8"}, {"status": "affected", "version": "20.12.4.0.03"}, {"status": "affected", "version": "20.16.1"}, {"status": "affected", "version": "20.16.1_LI_Images"}, {"status": "affected", "version": "20.12.4_LI_Images"}, {"status": "affected", "version": "20.9.5.2.16"}, {"status": "affected", "version": "20.12.4.0.4"}, {"status": "affected", "version": "20.12.401"}, {"status": "affected", "version": "20.9.5.3"}, {"status": "affected", "version": "20.9.5.3_LI_Images"}, {"status": "affected", "version": "20.12.4.1_LI_Images"}, {"status": "affected", "version": "20.12.4.1"}, {"status": "affected", "version": "20.9.5.2.21"}, {"status": "affected", "version": "20.9.6.0.3"}, {"status": "affected", "version": "20.12.4.0.6"}, {"status": "affected", "version": "20.15.2_LI_Images"}, {"status": "affected", "version": "20.15.2"}, {"status": "affected", "version": "20.12.4_Monthly_ES5"}, {"status": "affected", "version": "20.12.5"}, {"status": "affected", "version": "20.12.5_LI_Images"}, {"status": "affected", "version": "20.9.7_LI _Images"}, {"status": "affected", "version": "20.9.7"}, {"status": "affected", "version": "20.15.3"}, {"status": "affected", "version": "20.15.3_ LI _Images"}, {"status": "affected", "version": "20.12.501"}, {"status": "affected", "version": "20.12.5.1_LI_Images"}, {"status": "affected", "version": "20.12.5.1"}, {"status": "affected", "version": "20.12.5.2_LI_Images"}, {"status": "affected", "version": "20.12.5.2"}, {"status": "affected", "version": "20.15.3.1"}, {"status": "affected", "version": "20.15.4_LI_Images"}, {"status": "affected", "version": "20.15.4"}, {"status": "affected", "version": "20.9.7.1_LI _Images"}, {"status": "affected", "version": "20.9.7.1"}, {"status": "affected", "version": "20.18.1"}, {"status": "affected", "version": "20.18.1_LI_Images"}, {"status": "affected", "version": "20.12.6_LI_Images"}, {"status": "affected", "version": "20.12.6"}, {"status": "affected", "version": "20.12.5.1.01"}, {"status": "affected", "version": "26.0.1"}, {"status": "affected", "version": "20.9.8"}, {"status": "affected", "version": "20.9.8_LI_Images"}, {"status": "affected", "version": "20.18.2"}, {"status": "affected", "version": "20.15.4.1_LI_Images"}, {"status": "affected", "version": "20.15.4.1"}, {"status": "affected", "version": "20.18.2_LI_Images"}, {"status": "affected", "version": "26.1.1"}, {"status": "affected", "version": "26.1.1_LI_Images"}, {"status": "affected", "version": "20.18.2.1_LI_Images"}, {"status": "affected", "version": "20.18.2.1"}, {"status": "affected", "version": "20.15.4.2_LI_Images"}, {"status": "affected", "version": "20.15.4.2"}, {"status": "affected", "version": "20.12.6.1"}, {"status": "affected", "version": "20.12.6.1_LI_Images"}, {"status": "affected", "version": "20.12.5.3"}, {"status": "affected", "version": "20.12.5.3_LI_Images"}, {"status": "affected", "version": "20.9.8.2_LI_Images"}, {"status": "affected", "version": "20.9.8.2"}, {"status": "affected", "version": "20.18.3"}, {"status": "affected", "version": "20.18.3_LI_Images"}, {"status": "affected", "version": "20.15.5"}, {"status": "affected", "version": "20.15.5_LI_Images"}, {"status": "affected", "version": "20.12.7"}, {"status": "affected", "version": "20.12.7_LI_Images"}, {"status": "affected", "version": "20.9.9"}, {"status": "affected", "version": "20.9.9_LI_Images"}, {"status": "affected", "version": "20.18.2.2"}, {"status": "affected", "version": "20.18.2.2_LI_Images"}, {"status": "affected", "version": "20.12.5.4"}, {"status": "affected", "version": "20.12.5.4_LI_ Images"}, {"status": "affected", "version": "20.12.7.1_LI_Images"}, {"status": "affected", "version": "20.12.6.2_LI_Images"}, {"status": "affected", "version": "20.12.7.1"}, {"status": "affected", "version": "20.15.5.1"}, {"status": "affected", "version": "20.15.4.3"}, {"status": "affected", "version": "20.15.4.3_LI_Images"}, {"status": "affected", "version": "20.15.5.1_LI_Images"}, {"status": "affected", "version": "20.12.6.2"}, {"status": "affected", "version": "20.15.5.2"}, {"status": "affected", "version": "20.15.5.2_LI_Images"}, {"status": "affected", "version": "26.1.1.1_LI_Images"}, {"status": "affected", "version": "20.15.4.4"}, {"status": "affected", "version": "20.15.4.4_LI_Images"}, {"status": "affected", "version": "26.1.1.1"}, {"status": "affected", "version": "20.9.9.1_LI_Images"}, {"status": "affected", "version": "20.9.9.1"}]unknown
Unknown vendorUnknown product
cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*; end excluding 20.9.9.2supported
Unknown vendorUnknown product
cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*; start including 20.10; end excluding 20.12.7.2supported
Unknown vendorUnknown product
cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*; start including 20.13; end excluding 20.15.4.5supported
Unknown vendorUnknown product
cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*; start including 20.15.5; end excluding 20.15.5.3supported
Unknown vendorUnknown product
cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*; start including 20.16; end excluding 20.18.3.1supported
Unknown vendorUnknown product
cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*; start including 26.1; end excluding 26.1.1.2supported

Assessments

CVSS by origin

6.5
psirt@cisco.comCVSS 3.1 · role SecondaryCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
6.5
ciscoCVSS 3.1 · role unknownCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Limitations and unknowns

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
  • NVD-carried upstream facts remain derivative and are not independent corroboration.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.