9.8

CVE-2019-8261: ultravnc Out-of-bounds Read

CVSS: 9.8v3.0CriticalModified
Published 05-03-2019Last modified 17-09-2024
Open JSON

Vulnerability summary

CVE-2019-8261 is a critical (CVSS 9.8) Out-of-bounds Read vulnerability in ultravnc. EPSS estimates a 2.24% chance of exploitation in the next 30 days, higher than 82.6% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.0 (NVD)
EPSS score
2.24%
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. 05-03-2019
    PublishedVulnerability first disclosed.
  2. 17-09-2024
    Last modifiedVulnerability information updated.

Description

UltraVNC revision 1199 has a out-of-bounds read vulnerability in VNC code inside client CoRRE decoder, caused by multiplication overflow. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1200.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

2.24%

Chance of exploitation in the next 30 days

Percentile

83%

Versus all other CVEs

30-day change

0.00 pp

From 2.24% on 19-09-2026

19-09-202619-10-2026
EPSS score
2.24%

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

Ultravnc1 product
Uvnc1 product

2 vendors · 2 products

References

6 links