CVE-2019-8287

Tightvnc vulnerability

CVSS

9.8

EPSS

19.5%

EPSS pct

97th

Exploited

No known

TightVNC code version 1.3.10 contains global buffer overflow in HandleCoRREBBP macro function, which can potentially result code execution. This attack appear to be exploitable via network connectivity.

Affected vendor

Tightvnc

Affected product

Tightvnc

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness type (CWE)

CWE-120 — Classic Buffer Overflow

Published

2019-10-29

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 19.5% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2019-8287

Confirm whether Tightvnc Tightvnc is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2019-8287.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2019-8287

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2019-8287 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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