How severe is CVE-2016-2233?

CVE-2016-2233 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2016-2233 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 35% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-2233?

CVE-2016-2233 affects Hexchat Project Hexchat. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-2233?

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

When was CVE-2016-2233 published?

CVE-2016-2233 was published on 2017-01-18 and last updated on 2026-06-17.

CVE-2016-2233

CVE-2016-2233 is a high-severity vulnerability in Hexchat Project Hexchat with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 35% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 35% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Hexchat Project Hexchat
Published: 2017-01-18
Last modified: 2026-06-17

Description

Stack-based buffer overflow in the inbound_cap_ls function in common/inbound.c in HexChat 2.10.2 allows remote IRC servers to cause a denial of service (crash) via a large number of options in a CAP LS message.

Frequently asked questions

What is CVE-2016-2233?: Stack-based buffer overflow in the inbound_cap_ls function in common/inbound.c in HexChat 2.10.2 allows remote IRC servers to cause a denial of service (crash) via a large number of options in a CAP LS message.
How severe is CVE-2016-2233?: CVE-2016-2233 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2016-2233 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 35% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-2233?: CVE-2016-2233 affects Hexchat Project Hexchat. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-2233?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-2233 published?: CVE-2016-2233 was published on 2017-01-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:hexchat_project:hexchat:2.10.2:*:*:*:*:*:*:*

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