Denial of Service Vulnerability in Mongoose Web Server 6.9
CVE-2018-25193

8.7HIGH

Key Information:

Vendor

Cesanta

Status
Mongoose Web Server
Vendor
CVE Published:
6 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2018-25193?

Mongoose Web Server version 6.9 is susceptible to a denial of service vulnerability that allows remote attackers to disrupt service availability. By establishing multiple socket connections and transmitting malformed data, an attacker can exhaust server resources, leading to potential service crashes. This vulnerability poses risks for users by rendering the server non-functional until it is manually restarted.

Affected Version(s)

Mongoose Web Server 6.9

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2018-25193 - Proof of Concept

References

https://www.exploit-db.com/exploits/45819
exploit
https://www.vulncheck.com/advisories/mongoose-web-server-...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Ihsan Sencan
.