CVE-2026-20122
Confirmed PUBLISHEDCisco Catalyst SD-WAN Manager Arbitrary File Overwrite Vulnerability
1 day faster than CISA KEV
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
A vulnerability in the API of Cisco Catalyst SD-WAN Manager could allow an authenticated, remote attacker to overwrite arbitrary files on the local file system. To exploit this vulnerability, the attacker must have valid read-only credentials with API access on the affected system. This vulnerability is due to improper file handling on the API interface of an affected system. An attacker could exploit this vulnerability by uploading a malicious file on the local file system. A successful exploit could allow the attacker to overwrite arbitrary files on the affected system and gain vmanage user privileges.
- CVE Published
- Feb 25, 2026
- Exploitation Reported
- Jun 01, 2026
- CVSS
- 5.4 Medium
- EPSS
- 7.0%
Affected Versions
335 version rows · page 7 of 14
| Vendor | Product | Version | Status |
|---|---|---|---|
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.6.3.0.14 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.6.4 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.9.1 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.6.3.0.19 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.6.3.0.18 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.3.6 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.9.1.1 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.6.3.0.23 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.6.4.0.4 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.6.3.0.25 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.6.5 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.6.3.0.27 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.9.2 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.9.2.1 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.6.3.0.29 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.6.3.0.31 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.6.3.0.32 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.10.1 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.6.3.0.33 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.9.2.0.01 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.9.1_LI_Images |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.10.1_LI_Images |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.9.2_LI_Images |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.3.7 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.9.3 |
Affected |
CVE References
- cisco-sa-sdwan-authbp-qwCX8D4v sec.cloudapps.cisco.com · CVE Record https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurity...
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CVE First | 2026-06-01 13:22 UTC |
| CISA | 2026-06-02 14:01 UTC |
No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Exploitation Status
Exploited in the wild
Recorded 2026-06-01 13:22:22 UTC · CVE
Weaknesses (CWE)
-
Incorrect Use of Privileged APIs
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
14:01 UTC about 2 months ago14:01 UTC · about 2 months ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
13:22 UTC about 2 months ago13:22 UTC · about 2 months ago
Added to KEVIntel KEV Feed
High-confidence, third-party attested exploitation
-
16:14 UTC 5 months ago16:14 UTC · 5 months ago
CVE published
Vulnerability disclosed publicly
-
11:59 UTC 10 months ago11:59 UTC · 10 months ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2026-20122
{
"cve_id": "CVE-2026-20122",
"title": "Cisco Catalyst SD-WAN Manager Arbitrary File Overwrite Vulnerability",
"affected_vendor": "Cisco",
"affected_product": "Cisco Catalyst SD-WAN Manager",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 5.4,
"epss_score": 0.07016,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}