NVD / CVE Program· CNA cisco

CVE-2026-20262: Cisco Catalyst SD-WAN Manager Arbitrary File Write Vulnerability

Noroxi assessment

Priority: This week (action score 65/100)

CISA has confirmed exploitation in the wild (Jun 15, 2026). Remediation deadline for US federal agencies: Jun 29, 2026.
Probability of exploitation in the next 30 days: 29.1% (FIRST EPSS); higher than 98.1% of all records.
Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
According to the record, no fixed version is available yet.
Mentioned 2 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Don’t wait for the next maintenance window. Until a fix is released, restrict access to the affected component and follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

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.

MediumCVSS 6.5 · v3.1KEVWeaponized No fix recorded

Path traversal

BDU:2026-08313

Published: Jun 15, 2026
Updated: Jul 24, 2026
EPSS: 29.1% · 98th percentile
CWE: CWE-22

Report tools

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Action score

This week

Don’t wait for the next maintenance window.

CVSS: 26 / 40 · 6.5 / 10
CISA KEV: 30 / 30 · Listed
EPSS: 9 / 30 · 29.1%

CISA SSVC decision

Exploitation: active
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · cisco: 6.5; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Jun 15, 2026. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Jun 29, 2026.

Get told when this record changes

In CISA KEV: exploitation in the wild confirmed
Weaponized exploit exists
No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
cisco	catalyst sd-wan manager	cpe:2.3:a:cisco:catalyst_sd-wan_manager

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

cisco catalyst sd-wan managerbefore 20.9.9.2
cisco catalyst sd-wan manager20.10 and later · before 20.12.7.2
cisco catalyst sd-wan manager20.13 and later · before 20.15.4.5
cisco catalyst sd-wan manager20.15.5 and later · before 20.15.5.3
cisco catalyst sd-wan manager20.16 and later · before 20.18.3.1
cisco catalyst sd-wan manager26.1 and later · before 26.1.1.2

Versions reported by the vendor

Affected version ranges reported by the assigning authority (cisco). Independent of NVD's CPE analysis and usually ahead of it.

Cisco Cisco Catalyst SD-WAN Manager
- 20.1.12, 19.2.1, 18.4.4, 18.4.5, 20.1.1.1, 20.1.1, 19.3.0, 19.2.2, 19.2.099, 18.3.6, 18.3.7, 19.2.0 … (+28)affected

Same product

cisco: all records

Other highest-scoring records for the same primary product.

CVE-2026-20182Cisco Catalyst SD-WAN Controller Authentication Bypass VulnerabilityKEV
98Now
CVE-2026-20127Cisco Catalyst SD-WAN Controller Authentication Bypass VulnerabilityKEV
97Now
CVE-2026-76504Cisco Catalyst SD-WAN Manager System Account Authorization Bypass VulnerabilityKEV
81Now

Published before and after this one in the same product

← EarlierCVE-2026-20210May 14, 2026 · Cisco Catalyst SD-WAN Manager Privilege Escalation Vulnerability
21Monitor
← EarlierCVE-2026-20224May 14, 2026 · Cisco Catalyst SD-WAN Manager XML External Entity Injection Vulnerability
34Monitor
← EarlierCVE-2026-20245Jun 4, 2026 · Cisco Catalyst SD-WAN Controller Authenticated Privilege Escalation VulnerabilityKEV
69This week

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

Proof-of-concept repository on GitHub ×2

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
Source	Kind	Date
Proof-of-concept repository on GitHub	stars:0	2026-06-16
Proof-of-concept repository on GitHub	stars:1	2026-06-17

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

CISA KEVJun 15, 2026-1 d
PublishedJun 15, 2026
First PoCJun 16, 2026same day
TodayOct 31, 2026+138 d

EPSS, last 120 days+1% in 7 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2025-20187404 days apartCisco SD-WAN Manager Software Arbitrary File Creation Vulnerability
26Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

CVE-2026-2018232 days apartCisco Catalyst SD-WAN Controller Authentication Bypass VulnerabilityKEV
98Now
CVE-2026-20127110 days apartCisco Catalyst SD-WAN Controller Authentication Bypass VulnerabilityKEV
97Now
CVE-2026-76504107 days apartCisco Catalyst SD-WAN Manager System Account Authorization Bypass VulnerabilityKEV
81Now
CVE-2026-20129110 days apartCisco Catayst SD-WAN Authentication Bypass Vulnerability
39Monitor

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-26-1371 · Oct 21, 2026- Cisco Catalyst SD-WAN Manager Ayrıntılı Güvenlik Duyurusu (CVE-2026-76504)
TR-26-0390 · Jun 16, 2026(Cisco Catalyst SD-WAN Manager Güvenlik Bildirimi)

All national notices →

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: high · data or configuration can be modified
Availability: none

Attack vector: Network
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: High
Availability impact: None

Weakness class (CWE)

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

CVSS vector

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

nvd-secondary

Root cause

A user-supplied file name is joined with the allowed directory, but the result is never checked to confirm it is still inside that directory.

The bug in code

The whole CWE-22 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1const file = path.join(ROOT, req.query.name);
2res.sendFile(file);

Fixed

1const file = path.resolve(ROOT, req.query.name);
2if (!file.startsWith(ROOT + path.sep)) {
3  return res.sendStatus(400);
4}
5res.sendFile(file);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

—

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-arbfw-c2rZvQ

Show all references (1 more)

www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20262

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records