How severe is CVE-2017-9544?

CVE-2017-9544 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-9544 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 24% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-9544?

CVE-2017-9544 affects Echatserver Easy Chat Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-9544?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2017-9544 published?

CVE-2017-9544 was published on 2017-06-12 and last updated on 2026-06-17.

CVE-2017-9544

CVE-2017-9544 is a critical-severity vulnerability in Echatserver Easy Chat Server with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 24% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 24% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Echatserver Easy Chat Server
Published: 2017-06-12
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2017-9544?: 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.
How severe is CVE-2017-9544?: CVE-2017-9544 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-9544 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 24% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-9544?: CVE-2017-9544 affects Echatserver Easy Chat Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-9544?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2017-9544 published?: CVE-2017-9544 was published on 2017-06-12 and last updated on 2026-06-17.

References

https://www.exploit-db.com/exploits/42155/

Affected products (1)

cpe:2.3:a:echatserver:easy_chat_server:*:*:*:*:*:*:*:*

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