CVE-2021-27825

HIGHNVD 7.57.5—Elevated

7.5

A directory traversal vulnerability on Mercury MAC1200R devices allows attackers to read arbitrary files via a web-static/ URL.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 93.3%
KEV: Not listed

Published

May 29, 2023

Last Modified

January 14, 2025

References (4)

cve@mitrehttp://packetstormsecurity.com/files/171771/MAC-1200R-Directory-Traversal.html
cve@mitrehttps://www.mercurycom.com.cn/product-1-1.html
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/171771/MAC-1200R-Directory-Traversal.html
af854a3a-2127-422b-91ae-364da2661108https://www.mercurycom.com.cn/product-1-1.html

Weakness Classification(1)

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

CWE-22Path Traversal

Data Freshness Timeline

(refreshed 15× 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.

2026-06-08 14:15 UTCepss_batch
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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-51315
First seen Apr 7, 2023
MAC 1200R - Directory Traversal
Open source ↗

Frequently asked(5)

What is CVE-2021-27825?

CVE-2021-27825 is a high vulnerability published on May 29, 2023. A directory traversal vulnerability on Mercury MAC1200R devices allows attackers to read arbitrary files via a web-static/ URL.

When was CVE-2021-27825 disclosed?

CVE-2021-27825 was first published in the National Vulnerability Database on May 29, 2023, with the most recent update on January 14, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-27825 actively exploited?

CVE-2021-27825 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 93.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-27825?

CVE-2021-27825 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2021-27825?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-27825, 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-2021-27825

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-27825?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)