How severe is CVE-2017-7396?

CVE-2017-7396 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-2017-7396 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-7396?

CVE-2017-7396 affects Tigervnc. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-7396?

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-2017-7396 published?

CVE-2017-7396 was published on 2017-04-01 and last updated on 2026-06-17.

CVE-2017-7396

CVE-2017-7396 is a high-severity vulnerability in Tigervnc with a CVSS 3.x base score of 7.5. 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-772.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-772
Affected product: Tigervnc
Published: 2017-04-01
Last modified: 2026-06-17

Description

In TigerVNC 1.7.1 (CConnection.cxx CConnection::CConnection), an unauthenticated client can cause a small memory leak in the server.

Frequently asked questions

What is CVE-2017-7396?: In TigerVNC 1.7.1 (CConnection.cxx CConnection::CConnection), an unauthenticated client can cause a small memory leak in the server.
How severe is CVE-2017-7396?: CVE-2017-7396 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-2017-7396 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-7396?: CVE-2017-7396 affects Tigervnc. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-7396?: 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-2017-7396 published?: CVE-2017-7396 was published on 2017-04-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:tigervnc:tigervnc:1.7.1:*:*:*:*:*:*:*

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Other CWE-772 vulnerabilities

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CVE-2017-11641 — Critical (CVSS 9.8): GraphicsMagick 1.3.26 has a Memory Leak in the PersistCache function in magick/pixel_cache.c during writing of Magick…
CVE-2020-14339 — High (CVSS 8.8): A flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU process. This…
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