HOMEVULNERABILITIESCVE-2021-27825
HIGHPOC

CVE-2021-27825

CWE-22Published: May 29, 2023· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

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

NVD Source

Technical Analysis

CVE-2021-27825 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.

A proof-of-concept (PoC) exploit exists for CVE-2021-27825. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

mercurycom2 product(s)
mac1200r firmwaremac1200r
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

All References (4)

Quick Facts

CVE IDCVE-2021-27825
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-22
CISA KEVNo
ExploitPOC
Affected1 vendor(s)
PublishedMay 29, 2023

Related CVEs (CWE-22)

Recommended Actions

  • Apply vendor patches immediately
  • Monitor CVE-2021-27825 in threat intel feeds
  • Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.