UltraVNC revision 1207 has out-of-bounds read vulnerability in VNC client code inside TextChat module, which results in a denial of service (DoS) condition
Published Mar 9, 2019
7.5
HIGHCVSS 3.0
EPSS 1.95%
Description
UltraVNC revision 1207 has out-of-bounds read vulnerability in VNC client code inside TextChat module, which results in a denial of service (DoS) condition. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1208.
Affected products
-
- Version 1.2.2.3StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Kaspersky Lab | UltraVNC | n/a |
|
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 1.95% (0.01947) | 79.51th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.95% (0.01947) | 79.30th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.26% (0.00256) | 65.80th | v3 (v2023.03.01) |
| Feb 23, 2024 | 0.26% (0.00256) | 64.54th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.19% (0.00187) | 54.34th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.95% (0.00954) | 32.50th | v2 (v2022.01.01) |
| Feb 4, 2022 | 5.74% (0.05736) | 77.22th | v2 (v2022.01.01) |
| Feb 3, 2022 | 4.49% (0.04486) | 75.02th | v1 |
| Jan 6, 2022 | 4.49% (0.04486) | 74.80th | v1 |
| Jan 5, 2022 | 1.04% (0.01036) | 63.73th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.04% (0.01036) | 0.00th | v1 |
References (3)
- https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf x_refsource_CONFIRM
- https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-014-ultravnc-out-of-bounds-read/ x_refsource_MISCThird Party Advisory
- https://www.us-cert.gov/ics/advisories/icsa-20-161-06 x_refsource_MISC
| Link | Providers | Tags |
|---|---|---|
| https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf | x_refsource_CONFIRM | |
| https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-014-ultravnc-out-of-bounds-read/ | x_refsource_MISCThird Party Advisory | |
| https://www.us-cert.gov/ics/advisories/icsa-20-161-06 | x_refsource_MISC |
Change history (0)
No recorded changes yet.