How severe is CVE-2017-5581?

CVE-2017-5581 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-2017-5581 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-5581?

CVE-2017-5581 affects Tigervnc. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-5581?

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-2017-5581 published?

CVE-2017-5581 was published on 2017-02-28 and last updated on 2026-06-17.

CVE-2017-5581

CVE-2017-5581 is a critical-severity vulnerability in Tigervnc 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-119.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 6.8
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Tigervnc
Published: 2017-02-28
Last modified: 2026-06-17

Description

Buffer overflow in the ModifiablePixelBuffer::fillRect function in TigerVNC before 1.7.1 allows remote servers to execute arbitrary code via an RRE message with subrectangle outside framebuffer boundaries.

Frequently asked questions

What is CVE-2017-5581?: Buffer overflow in the ModifiablePixelBuffer::fillRect function in TigerVNC before 1.7.1 allows remote servers to execute arbitrary code via an RRE message with subrectangle outside framebuffer boundaries.
How severe is CVE-2017-5581?: CVE-2017-5581 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-2017-5581 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-5581?: CVE-2017-5581 affects Tigervnc. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-5581?: 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-2017-5581 published?: CVE-2017-5581 was published on 2017-02-28 and last updated on 2026-06-17.

References

Affected products (1)

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

More vulnerabilities in Tigervnc

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CVE-2020-26117 — High (CVSS 8.1): In rfb/CSecurityTLS.cxx and rfb/CSecurityTLS.java in TigerVNC before 1.11.0, viewers mishandle TLS certificate…
CVE-2025-26601 — High (CVSS 7.8): A use-after-free flaw was found in X.Org and Xwayland. When changing an alarm, the values of the change mask are…

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