Cisco SD-WAN Solution Arbitrary File Overwrite Vulnerability
A vulnerability in the Cisco SD-WAN Solution could allow an authenticated, remote attacker to overwrite arbitrary files on the underlying operating system of an affected device. The vulnerability is due to improper input validation of the save command in the CLI of the affected software. An attacker could exploit this vulnerability by modifying the save command in the CLI of an affected device. A successful exploit could allow the attacker to overwrite arbitrary files on the underlying operating system of an affected device and escalate their privileges to the root user.
- Published
- Jan 24, 2019
- Updated
- Jun 16, 2026
- EPSS
- 3.5% · 89th percentile
- CWE
- CWE-20
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Report tools
Action score
36
Monitor
Low priority for now.
- CVSS
- 35 / 40 · 8.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 3.5%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 8.8
- CNA · cisco
- 8.8
- agree
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| cisco | vedge 100 firmware | cpe:2.3:o:cisco:vedge_100_firmware |
| cisco | vedge 100 | cpe:2.3:h:cisco:vedge_100 |
| cisco | vedge 1000 firmware | cpe:2.3:o:cisco:vedge_1000_firmware |
| cisco | vedge 1000 | cpe:2.3:h:cisco:vedge_1000 |
| cisco | vedge 2000 firmware | cpe:2.3:o:cisco:vedge_2000_firmware |
| cisco | vedge 2000 | cpe:2.3:h:cisco:vedge_2000 |
| cisco | vedge 5000 firmware | cpe:2.3:o:cisco:vedge_5000_firmware |
| cisco | vedge 5000 | cpe:2.3:h:cisco:vedge_5000 |
| cisco | sd-wan | cpe:2.3:a:cisco:sd-wan |
| cisco | vbond orchestrator | cpe:2.3:a:cisco:vbond_orchestrator |
| cisco | vmanage network management | cpe:2.3:a:cisco:vmanage_network_management |
| cisco | vsmart controller | cpe:2.3:a:cisco:vsmart_controller |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- cisco sd-wanbefore 18.4.0
- cisco vbond orchestratorall versions
- cisco vedge 100 firmwareall versions
- cisco vedge 1000 firmwareall versions
- cisco vedge 2000 firmwareall versions
- cisco vedge 5000 firmwareall versions
- cisco vmanage network managementall versions
- cisco vsmart controllerall versions
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 SD-WAN Solution
- n/aaffected
Same product
cisco: all recordsOther highest-scoring records for the same primary product.
- CVE-2018-0432Cisco SD-WAN Solution Privilege Escalation Vulnerability36Monitor
- CVE-2019-1648Cisco SD-WAN Solution Privilege Escalation Vulnerability31Monitor
- CVE-2019-1646Privilege Escalation Vulnerability in Cisco SD-WAN Solution31Monitor
- CVE-2018-0433Cisco SD-WAN Solution Command Injection Vulnerability31Monitor
- CVE-2021-1510Cisco SD-WAN vEdge Software Buffer Overflow Vulnerabilities30Monitor
- CVE-2021-1509Cisco SD-WAN vEdge Software Buffer Overflow Vulnerabilities30Monitor
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.
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 researchersFinders, 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.
No nightly-computed relations.
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).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-19-007 · Feb 10, 2019(Cisco Güvenlik Güncellemeleri Yayınladı)
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
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-20 · Improper Input ValidationCVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd-primary
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)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Server Side Include (SSI) InjectionCAPEC-101likelihood: High · High
- Cross Zone ScriptingCAPEC-104likelihood: Medium · High
- Command Line Execution through SQL InjectionCAPEC-108likelihood: Low · Very High
- Object Relational Mapping InjectionCAPEC-109likelihood: Low · High
- SQL Injection through SOAP Parameter TamperingCAPEC-110likelihood: High · Very High
- Double EncodingCAPEC-120likelihood: Low · Medium
- Subverting Environment Variable ValuesCAPEC-13likelihood: High · Very High
ATT&CK techniques
- Obfuscated Files or InformationT1027
- Masquerading: Invalid Code SignatureT1036.001
- Steal Web Session CookieT1539
- Subvert Trust Controls: Code SigningT1553.002
- Impair Defenses:Impair Command History LoggingT1562.003
- Hijack Execution Flow:Dynamic Linker HijackingT1574.006
- Hijack Execution Flow:Path Interception by PATH Environment VariableT1574.007
Change log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- www.securityfocus.com/bid/106716
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-sdwan-file-write
Vendor advisories and official records. Exploit/PoC links are deliberately left out.