How severe is CVE-2018-7226?

CVE-2018-7226 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-2018-7226 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-7226?

CVE-2018-7226 affects Vncterm Project Vncterm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-7226?

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-2018-7226 published?

CVE-2018-7226 was published on 2018-02-19 and last updated on 2026-06-17.

CVE-2018-7226

CVE-2018-7226 is a critical-severity vulnerability in Vncterm Project Vncterm with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-190.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-190
Affected product: Vncterm Project Vncterm
Published: 2018-02-19
Last modified: 2026-06-17

Description

An issue was discovered in vcSetXCutTextProc() in VNConsole.c in LinuxVNC and VNCommand from the LibVNC/vncterm distribution through 0.9.10. Missing sanitization of the client-specified message length may cause integer overflow or possibly have unspecified other impact via a specially crafted VNC packet.

Frequently asked questions

What is CVE-2018-7226?: An issue was discovered in vcSetXCutTextProc() in VNConsole.c in LinuxVNC and VNCommand from the LibVNC/vncterm distribution through 0.9.10. Missing sanitization of the client-specified message length may cause integer overflow or possibly have unspecified other impact via a specially crafted VNC packet.
How severe is CVE-2018-7226?: CVE-2018-7226 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-2018-7226 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-7226?: CVE-2018-7226 affects Vncterm Project Vncterm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-7226?: 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-2018-7226 published?: CVE-2018-7226 was published on 2018-02-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:vncterm_project:vncterm:*:*:*:*:*:*:*:*

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