CVE-2017-9544

Name: CVE-2017-9544
Creator: NVD / NIST
Published: 2017-06-12T06:29:00.557+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 24.12%

Last modified Jun 17, 2026

CVE-2017-9544 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. There is a remote stack-based buffer overflow (SEH) in register.ghp in EFS Software Easy Chat Server versions 2.0 to 3.1. By sending an overly long username string to registresult.htm for registering the user, an attacker may be able to execute arbitrary code.. EPSS estimates a 24.12% chance of exploitation in the next 30 days.

Description

There is a remote stack-based buffer overflow (SEH) in register.ghp in EFS Software Easy Chat Server versions 2.0 to 3.1. By sending an overly long username string to registresult.htm for registering the user, an attacker may be able to execute arbitrary code.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

24.12%

97.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Echatserver	Easy Chat Server	>= 2.0, <= 3.1

References

https://www.exploit-db.com/exploits/42155/Exploit, Third Party Advisory, VDB Entry
https://www.exploit-db.com/exploits/42155/Exploit, Third Party Advisory, VDB Entry

Timeline

Published: Jun 12, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-9544?

How severe is CVE-2017-9544?

CVE-2017-9544 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 24.12% probability of exploitation in the next 30 days.

How do I fix CVE-2017-9544?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-9544?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST