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CVE-2021-27715

29
FAUCET Score

CVE-2021-27715 is a critical authentication bypass vulnerability affecting MoFi Network MOFI4500-4GXeLTE-V2 routers running firmware version 3.5.6-xnet-5052. An unauthenticated attacker can exploit this flaw by sending a specially crafted HTTP request, leading to arbitrary code execution on the device. With a CVSS score of 9.8 (Critical), this vulnerability requires no user interaction or prior authentication, posing a significant risk of full system compromise. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
3.5.6-xnet-5052CPE matchmatch criteria
cpe:2.3:o:mofinetwork:mofi4500-4gxelte-v2_firmware:3.5.6-xnet-5052:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.04%
Probability of exploitation in next 30 days
EPSS Percentile
60.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0104 is in the 46th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

nagarro.com / services/security/mofi-cve-security-advisory
Third Party Advisory