CVE-2026-20262
Confirmed PUBLISHEDCisco Catalyst SD-WAN Manager Arbitrary File Write Vulnerability
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
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.
- CVE Published
- Jun 15, 2026
- Exploitation Reported
- Jun 15, 2026
- CVSS
- 6.5 Medium
- EPSS
- 7.7%
Affected Versions
376 version rows · page 1 of 16
| Vendor | Product | Version | Status |
|---|---|---|---|
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.1.12 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
19.2.1 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
18.4.4 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
18.4.5 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.1.1.1 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
20.1.1 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
19.3.0 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
19.2.2 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
19.2.099 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
18.3.6 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
18.3.7 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
19.2.0 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
18.3.8 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
19.0.0 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
19.1.0 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
18.4.302 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
18.4.303 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
19.2.097 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
19.2.098 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
17.2.10 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
18.3.6.1 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
19.0.1a |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
18.2.0 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
18.4.3 |
Affected |
| Cisco |
Cisco Catalyst SD-WAN Manager
|
18.4.1 |
Affected |
CVE References
- cisco-sa-sdwan-arbfw-c2rZvQ 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.
- Check enrichment artifacts for scanner coverage and available PoCs before rolling remediation validation.
- 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 |
|---|---|
| CISA First | 2026-06-15 00:00 UTC |
| BleepingComputer | 2026-06-15 18:20 UTC |
| Daily CyberSecurity | 2026-06-15 18:20 UTC |
| All CISA Advisories | 2026-06-15 20:20 UTC |
| CVE | 2026-06-15 20:41 UTC |
| TheHackerNews | 2026-06-16 07:20 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:N/I:H/A:N
Exploitation Status
Exploited in the wild
Recorded 2026-06-15 18:20:17 UTC · BleepingComputer
Proof of concept available
Recorded 2026-06-16 06:24:11 UTC · GitHub
Weaknesses (CWE)
-
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Recent Mentions
TheHackerNews · Jun 16, 2026
Cisco has released security updates for a medium-severity security flaw in Catalyst SD-WAN Manager that has come under active exploitation in the wild. The vulnerability, tracked as CVE-2026-20262, carries a CVSS score of 6.5 out of 10.0. "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
BleepingComputer · Jun 15, 2026
Cisco has released security updates to address a vulnerability in the Catalyst SD-WAN Manager, tracked as CVE-2026-20262, that was exploited in attacks to escalate to root privileges. [...]
Daily CyberSecurity · Jun 15, 2026
A Cisco SD-WAN vulnerability is now under active attack, and Cisco is urging customers to patch fast. Tracked The post Cisco SD-WAN Vulnerability Exploited in the Wild: Patch CVE-2026-20262 Now appeared first on Daily CyberSecurity. Related posts: Under Attack: Critical Cisco RCE (CVE-2026-20045) Exploited in the Wild Under Attack: Cisco Urges Immediate Action as Hackers Actively Exploit SD-WAN Manager Flaws CISA Warns of Active Exploitation in Cisco, PaperCut, and Zimbra
Cisco Security Advisory · Jun 15, 2026
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. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-arbfw-c2rZvQ Security Impact Rating: Medium CVE: CVE-2026-20262
All CISA Advisories · Jun 15, 2026
CISA has added two new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation. CVE-2026-20262 Cisco Catalyst SD-WAN Manager Directory or Path Traversal Vulnerability CVE-2026-54420 LiteSpeed cPanel Plugin UNIX Symbolic Link (Symlink) Following Vulnerability These types of vulnerabilities are a frequent attack vector for malicious cyber actors and pose significant risks to the federal enterprise. Binding Operational Directive (BOD) 26-04: Prioritizing Security Updates Based on Risk establishes vulnerability management requirements for Federal Civilian Executive Branch (FCEB) agencies, updating BOD 22-01. BOD 26-04 reinforces the importance of the KEV catalog and requires federal agencies to prioritize rapid remediation of high-risk vulnerabilities, specifically those identified by Common Vulnerabilities and Exposures (CVEs) listed in CISA’s Known Exploited Vulnerabilities (KEV) catalog on publicly exposed assets that grant total control of the asset post-exploitation, while deferring action for lower-risk vulnerabilities. BOD 26-04 further establishes basic expectations for when agencies must check whether threat actors compromised the system before the patch was applied. While BOD 26-04 applies only to FCEB agencies, CISA encourages all organizations to adopt risk-based vulnerability management and prioritize remediation of KEV catalog vulnerabilities. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria. Aware of an exploited vulnerability not currently listed in the KEV catalog? Submit for potential addition: KEV Nomination Form. Potential KEV additions must have a CVE ID, evidence of exploitation, and clear mitigation guidance.
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
github · Created 2026-06-17 16:36:33 UTC · 1 stars
CVE-2026-20262 - Cisco Catalyst SD-WAN Manager Arbitrary File Write Path Traversal Vulnerability (CWE-22) - Authenticated Remote File Write
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
07:20 UTC about 1 month ago07:20 UTC · about 1 month ago
KEV confirmed by TheHackerNews
Exploitation attested by an external source
-
06:24 UTC about 1 month ago06:24 UTC · about 1 month ago
Public PoC available
Public proof-of-concept code published
-
20:41 UTC about 1 month ago20:41 UTC · about 1 month ago
KEV confirmed by CVE
Exploitation attested by an external source
-
20:20 UTC about 1 month ago20:20 UTC · about 1 month ago
KEV confirmed by All CISA Advisories
Exploitation attested by an external source
-
18:20 UTC about 1 month ago18:20 UTC · about 1 month ago
KEV confirmed by Daily CyberSecurity
Exploitation attested by an external source
-
18:20 UTC about 1 month ago18:20 UTC · about 1 month ago
KEV confirmed by BleepingComputer
Exploitation attested by an external source
-
16:21 UTC about 1 month ago16:21 UTC · about 1 month ago
CVE published
Vulnerability disclosed publicly
-
00:00 UTC about 1 month ago00:00 UTC · about 1 month ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
11:59 UTC 9 months ago11:59 UTC · 9 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-2026-20262
{
"cve_id": "CVE-2026-20262",
"title": "Cisco Catalyst SD-WAN Manager Arbitrary File Write Vulnerability",
"affected_vendor": "Cisco",
"affected_product": "Cisco Catalyst SD-WAN Manager",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 6.5,
"epss_score": 0.07683,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}