9.8

CVE-2019-8268: kaspersky lab ultravnc Off-by-one Error

CVSS: 9.8v3.1CriticalModified
Published 09-03-2019Last modified 17-09-2024
Open JSON

Vulnerability summary

CVE-2019-8268 is a critical (CVSS 9.8) Off-by-one Error vulnerability in kaspersky lab ultravnc. EPSS estimates a 3.92% chance of exploitation in the next 30 days, higher than 90.2% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
3.92%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 09-03-2019
    PublishedVulnerability first disclosed.
  2. 17-09-2024
    Last modifiedVulnerability information updated.

Description

UltraVNC revision 1206 has multiple off-by-one vulnerabilities in VNC client code connected with improper usage of ClientConnection::ReadString function, which can potentially result code execution. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1207.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

3.92%

Chance of exploitation in the next 30 days

Percentile

90%

Versus all other CVEs

30-day change

0.00 pp

From 3.92% on 19-09-2026

19-09-202619-10-2026
EPSS score
3.92%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Siemens3 products
Kaspersky lab1 product
Uvnc1 product

3 vendors · 5 products

References

3 links