KEV Intelligence

Vulnerability report

Exploited in the wild Confirmed confidence In CISA KEV

CVE-2026-20262

Cisco Catalyst SD-WAN Manager Arbitrary File Write Vulnerability

Cisco / Cisco Catalyst SD-WAN Manager · 20.1.12

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Severity
CVSS 6.5 · Medium
Confidence
Confirmed
Exploit status
Exploited in the wild
EPSS
28.2%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2026-20262 is Cisco Catalyst SD-WAN Manager Arbitrary File Write Vulnerability. A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an authenticated, remote...

Is it exploited?

Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is confirmed.

Who is affected?

Cisco / Cisco Catalyst SD-WAN Manager 20.1.12.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

Cisco Catalyst SD-WAN Manager Arbitrary File Write Vulnerability

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.

Vendor Product Affected Status
Cisco Cisco Catalyst SD-WAN Manager 20.3.2.1_927 Affected
Cisco Cisco Catalyst SD-WAN Manager 18.4.6 Affected
Cisco Cisco Catalyst SD-WAN Manager 20.1.2_937 Affected
Cisco Cisco Catalyst SD-WAN Manager 20.4.1 Affected
Cisco Cisco Catalyst SD-WAN Manager 20.3.2_928 Affected
Cisco Cisco Catalyst SD-WAN Manager 20.3.2_929 Affected
Cisco Cisco Catalyst SD-WAN Manager 20.4.1.0.1 Affected
Cisco Cisco Catalyst SD-WAN Manager 20.3.2.1_930 Affected
Cisco Cisco Catalyst SD-WAN Manager 19.2.4 Affected
Cisco Cisco Catalyst SD-WAN Manager 20.5.0.1.1 Affected
Cisco Cisco Catalyst SD-WAN Manager 20.4.1.1 Affected
Cisco Cisco Catalyst SD-WAN Manager 20.3.3 Affected
Cisco Cisco Catalyst SD-WAN Manager 19.2.4.0.1 Affected
Cisco Cisco Catalyst SD-WAN Manager 20.3.2_937 Affected
Cisco Cisco Catalyst SD-WAN Manager 20.3.3.1 Affected
Cisco Cisco Catalyst SD-WAN Manager 20.5.1 Affected
Cisco Cisco Catalyst SD-WAN Manager 20.1.3 Affected
Cisco Cisco Catalyst SD-WAN Manager 20.3.3.0.4 Affected
Cisco Cisco Catalyst SD-WAN Manager 20.3.3.1.2 Affected
Cisco Cisco Catalyst SD-WAN Manager 20.3.3.1.1 Affected
Cisco Cisco Catalyst SD-WAN Manager 20.4.1.2 Affected
Cisco Cisco Catalyst SD-WAN Manager 20.3.3.0.2 Affected
Cisco Cisco Catalyst SD-WAN Manager 20.4.1.1.5 Affected
Cisco Cisco Catalyst SD-WAN Manager 20.4.1.0.01 Affected
Cisco Cisco Catalyst SD-WAN Manager 20.4.1.0.02 Affected
Published
15 Jun 2026
Exploitation Reported
15 Jun 2026
Attack vector
Remote
Complexity
Low
Privileges
Low
User interaction
None

Tags

edge cisa

CVE References

  • CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2026-20262
  • cisco-sa-sdwan-arbfw-c2rZvQ sec.cloudapps.cisco.com · CVE Record https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurity...

Exploitation evidence

Why KEV Intelligence marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

BleepingComputer

Recorded 15 Jun 2026

Independent exploitation attestation added to the KEV Intelligence record.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.

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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

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
0
User-Agents
0

Raw values available in Pro and Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

No detection artifacts or sensor request patterns are available for this CVE yet.

Check back as sensor telemetry and scanner integrations are updated.

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

EPSS

28.2%

Weaknesses

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') CWE-22

Recent mention · TheHackerNews

Cisco Releases Security Updates for Actively Exploited SD-WAN Manager Flaw

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...

Read full advisory

All Mentions

Recent mention · TheHackerNews

Cisco Releases Security Updates for Actively Exploited SD-WAN Manager Flaw

TheHackerNews · 16 Jun 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

Recent mention · BleepingComputer

Cisco fixes SD-WAN vManage flaw exploited in zero-day attacks

BleepingComputer · 15 Jun 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. [...]

Recent mention · Daily CyberSecurity

Cisco SD-WAN Vulnerability Exploited in the Wild: Patch CVE-2026-20262 Now

Daily CyberSecurity · 15 Jun 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

Recent mention · Cisco Security Advisory

Cisco Catalyst SD-WAN Manager Arbitrary File Write Vulnerability

Cisco Security Advisory · 15 Jun 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....

Recent mention · All CISA Advisories

CISA Adds Two Known Exploited Vulnerabilities to Catalog

All CISA Advisories · 15 Jun 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...

Timeline

From disclosure to observed exploitation

  1. KEV confirmed by TheHackerNews

    Exploitation attested by an external source

  2. KEV confirmed by CVE

    Exploitation attested by an external source

  3. KEV confirmed by All CISA Advisories

    Exploitation attested by an external source

  4. KEV confirmed by Daily CyberSecurity

    Exploitation attested by an external source

  5. KEV confirmed by BleepingComputer

    Exploitation attested by an external source

  6. CVE published

    Vulnerability disclosed publicly

  7. Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  8. CVE ID reserved

    Identifier reserved by the CNA

Pro API

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GET /api/v2/pro/kevs/CVE-2026-20262

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2026-20262",
  "confidence": "Confirmed",
  "cvss_score": 6.5,
  "cvss_estimated": false,
  "epss_score": 0.28171,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}

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