NVD / CVE Program· CNA cisco

CVE-2020-26071: Cisco SD-WAN vEdge Arbitrary File Creation Vulnerability

Noroxi assessment

Priority: Monitor (action score 33/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.19% (FIRST EPSS).
Someone with local access to the system 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.

Low priority for now. Update when a fix is released; 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 · FIRST EPSS

A vulnerability in the CLI of Cisco SD-WAN Software could allow an authenticated, local attacker to create or overwrite arbitrary files on an affected device, which could result in a denial of service (DoS) condition. The vulnerability is due to insufficient input validation for specific commands. An attacker could exploit this vulnerability by including crafted arguments to those specific commands. A successful exploit could allow the attacker to create or overwrite arbitrary files on the affected device, which could result in a DoS condition.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

HighCVSS 8.4 · v3.1—No exploit No fix recorded

Path traversal

BDU:2020-05194

Published: Nov 18, 2024
Updated: Jun 16, 2026
EPSS: 0.1% · 8th percentile
CWE: CWE-22

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 33 / 40 · 8.4 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.1%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · cisco: 8.4; NVD has not scored this yet; the score shown is the CNA’s.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H/RL:X/RC:X/E:X

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

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
No fixed version yet

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

Is your version affected? Check it

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 manager17.2.10
cisco catalyst sd-wan manager17.2.4
cisco catalyst sd-wan manager17.2.5
cisco catalyst sd-wan manager17.2.6
cisco catalyst sd-wan manager17.2.7
cisco catalyst sd-wan manager17.2.8
cisco catalyst sd-wan manager17.2.9
cisco catalyst sd-wan manager18.2.0
cisco catalyst sd-wan manager18.3.0
cisco catalyst sd-wan manager18.3.1
cisco catalyst sd-wan manager18.3.1.1
cisco catalyst sd-wan manager18.3.3
cisco catalyst sd-wan manager18.3.3.1
cisco catalyst sd-wan manager18.3.4
cisco catalyst sd-wan manager18.3.5
cisco catalyst sd-wan manager18.3.6
cisco catalyst sd-wan manager18.3.6.1
cisco catalyst sd-wan manager18.3.7
cisco catalyst sd-wan manager18.3.8
cisco catalyst sd-wan manager18.4.0

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
Cisco Cisco SD-WAN vContainer
- 18.4.5, 20.1.12, 18.3.6, 19.2.1, 19.3.0, 20.1.1, 19.2.2, 18.3.8, 18.4.3, 18.4.4, 18.4.302, 19.1.0 … (+22)affected
Cisco Cisco SD-WAN vEdge Cloud
- 19.2.1, 20.1.12, 18.4.4, 19.3.0, 18.3.8, 19.2.2, 20.1.1, 18.3.6, 18.4.3, 18.4.302, 18.4.5, 18.4.303 … (+23)affected
Cisco Cisco SD-WAN vEdge Router
- 18.4.303, 18.3.7, 19.3.0, 18.2.0, 20.1.12, 19.2.099, 17.2.10, 18.3.3, 18.3.6, 19.0.0, 17.2.6, 18.4.0 … (+26)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
96Now
CVE-2026-76504Cisco Catalyst SD-WAN Manager System Account Authorization Bypass VulnerabilityKEV
81Now

Published before and after this one in the same product

← EarlierCVE-2021-1484Nov 15, 2024 · Cisco SD-WAN vManage Command Injection Vulnerability
26Monitor
← EarlierCVE-2021-1491Nov 15, 2024 · Cisco SD-WAN vManage Software Information Disclosure Vulnerability
26Monitor
Later →CVE-2020-26073Nov 18, 2024 · Cisco SD-WAN vManage Directory Traversal Vulnerability
34Monitor

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

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

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.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

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-2020-26065472 days apartA vulnerability in the web-based management interface of Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to…
27Monitor
CVE-2025-20187170 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.

—

Bug bounty scope

No known public program.

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

Technical details

Attack conditions

Someone with local access to the system 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: high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

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

Weakness class (CWE)

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

CVSS vector

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

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-vsoln-arbfile-gtsEYxns

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

All records