CVE-2019-8271
9.8
CRITICAL · CVSS 3.1 · EPSS 8.3% (pctl 95)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
Description
UltraVNC revision 1211 has a heap buffer overflow vulnerability in VNC server code inside file transfer handler, which can potentially result code execution. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1212.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 8.26% — more likely to be exploited than 95% of all CVEs |
| Weakness | CWE-122 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2019-03-08 |
| Last modified | 2026-06-17 |
Affected (4)
| Vendor | Product |
|---|---|
| siemens | sinumerik access mymachine\/p2p |
| siemens | sinumerik pcu base win10 software\/ipc |
| siemens | sinumerik pcu base win7 software\/ipc |
| uvnc | ultravnc |
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf
- https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-018-ultravnc-heap-based-buffer-overflow/
- https://www.us-cert.gov/ics/advisories/icsa-20-161-06
- https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf
- https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-018-ultravnc-heap-based-buffer-overflow/
- https://www.us-cert.gov/ics/advisories/icsa-20-161-06
→ the Explorer · watch your stack · NVD