CVE-2018-6940

MEDIUMNVD 6.16.1—Elevated

6.1

A /shell?cmd= XSS issue exists in the HTTPD component of NAT32 v2.2 Build 22284 devices that can be exploited for Remote Code Execution in conjunction with CSRF.

CVSS v3: 6.1
EG Score: 6.1(medium)
EPSS: 92.3%
KEV: Not listed

Published

February 20, 2018

Last Modified

November 21, 2024

References (8)

cve@mitrehttp://hyp3rlinx.altervista.org/advisories/NAT32-REMOTE-COMMAND-EXECUTION-CVE-2018-6940.txt
cve@mitrehttp://packetstormsecurity.com/files/146373/NAT32-Build-22284-Remote-Command-Execution.html
cve@mitrehttp://www.securityfocus.com/archive/1/541777/100/0/threaded
cve@mitrehttps://www.exploit-db.com/exploits/44033/
af854a3a-2127-422b-91ae-364da2661108http://hyp3rlinx.altervista.org/advisories/NAT32-REMOTE-COMMAND-EXECUTION-CVE-2018-6940.txt
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/146373/NAT32-Build-22284-Remote-Command-Execution.html
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/archive/1/541777/100/0/threaded
af854a3a-2127-422b-91ae-364da2661108https://www.exploit-db.com/exploits/44033/

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-05 06:08 UTCepss_batch
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2026-06-04 13:10 UTCepss_batch
2026-06-04 13:10 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
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2026-05-31 00:14 UTCepss_batch
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2026-05-29 13:41 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 11:13 UTCEG score recompute
2026-05-28 11:12 UTCGHSA enrichment
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Exploit-DBEDB-44033
First seen Feb 14, 2018
NAT32 2.2 Build 22284 - Remote Command Execution
Open source ↗

Frequently asked(5)

What is CVE-2018-6940?

CVE-2018-6940 is a medium vulnerability published on February 20, 2018. A /shell?cmd= XSS issue exists in the HTTPD component of NAT32 v2.2 Build 22284 devices that can be exploited for Remote Code Execution in conjunction with CSRF.

When was CVE-2018-6940 disclosed?

CVE-2018-6940 was first published in the National Vulnerability Database on February 20, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2018-6940 actively exploited?

CVE-2018-6940 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 92.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-6940?

CVE-2018-6940 has a CVSS v3 base score of 6.1 (NVD).

How do I remediate CVE-2018-6940?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-6940, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2018-6940

📅 Published

🔄 Last Modified

🔗 References (8)

Weakness Classification(2)

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-6940?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (8)

Frequently asked(5)

Related CVEs(same CWE)