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Fencer Intel
critical 9.8

CVE-2019-8272 json

UltraVNC revision 1211 has multiple off-by-one vulnerabilities in VNC server code, which can potentially result in code execution.

published 7y ago modified 4mo ago also EUVD-2019-17670

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.9%
EPSS 3.9% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

UltraVNC revision 1211 has multiple off-by-one vulnerabilities in VNC server code, which can potentially result in code execution. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1212.

Patch / fix

  • uvnc ultravnc 1.2.2.3
  • siemens sinumerik_access_mymachine/p2p 4.8
  • siemens sinumerik_pcu_base_win10_software/ipc 14.00

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-20-161-06 updated cvss 9.8

Siemens SINUMERIK

  • Siemens SINUMERIK Access MyMachine /P2P <V4.8
    affected: fixed in V4.8, mitigation
  • Siemens SINUMERIK PCU base Win7 software /IPC <V12.01_HF4
    affected: fixed in V12.01, mitigation
  • Siemens SINUMERIK PCU base Win10 software /IPC <V14.00
    affected: fixed in V14.00, mitigation

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

3.92% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • Kaspersky Lab UltraVNC

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.