No exploitation reportedFix available

CVE-2019-8275

Q: Is CVE-2019-8275 actively exploited?

Active exploitation of CVE-2019-8275 has not been confirmed. Its EPSS score was 4.0% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2019-8275?

CVE-2019-8275 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2019-03-08
Fixed in4.8
WeaknessCWE-170

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

UltraVNC revision 1211 has multiple improper null termination vulnerabilities in VNC server code, which result in out-of-bound data being accessed by remote users. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1212.

Timeline

dates in UTC

2019-03-0823:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-8275?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-8275?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Siemens sinumerik access mymachine\/p2p

Branch	Affected	Fixed in	Source
4.8	< 4.8	4.8	NVD

Siemens sinumerik pcu base win10 software\/ipc

Branch	Affected	Fixed in	Source
14.0	< 14.00	14.00	NVD

Siemens sinumerik pcu base win7 software\/ipc

Branch	Affected	Fixed in	Source
12.1	≤ 12.01	no fix published	NVD

1 more product in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-21-131-04 CISA8 known affected
Siemens SINAMICS Medium Voltage Products Remote Access (Update B)
SINAMICS GH150 · SINAMICS GL150 (with option X30) · SINAMICS GM150 (with option X30) · +5 more
ICSA-21-131-11 CISA4 known affected
Siemens SIMATIC UltraVNC HMI WinCC Products
SIMATIC HMI Comfort Outdoor Panels 7" & 15" (incl. SIPLUS variants) · SIMATIC HMI Comfort Panels 4" - 22" (incl. SIPLUS variants) · SIMATIC HMI KTP Mobile Panels KTP400F, KTP700, KTP700F, KTP900 and KTP900F · +1 more
ICSA-20-161-06 CISA3 known affected
Siemens SINUMERIK
Siemens SINUMERIK Access MyMachine /P2P: All versions < V4.8 · Siemens SINUMERIK PCU base Win10 software /IPC: All versions < V14.00 · Siemens SINUMERIK PCU base Win7 software /IPC: All versions < V12.01 HF4

Full record on NVD

Fix

Update Siemens sinumerik access mymachine\/p2p to 4.8
Vendor fix CISA ICSA-21-131-11 · 3 productsUpdate SIMATIC WinCC (TIA Portal) to V16 Update 4 or later version, and then update panel to V16 Update 4 or later version
Vendor fix CISA ICSA-21-131-11 · 1 productUpdate to V16 Update 4 or later version
Vendor fix CISA ICSA-20-161-06 · 1 productUpdate to V4.8
Vendor fix CISA ICSA-20-161-06 · 1 productUpdate to V14.00
Vendor fix CISA ICSA-20-161-06 · 1 productUpdate to V12.01 HF4
Mitigation from the vendor CISA ICSA-21-131-04 · 1 productAs only SIMATIC HMI image versions < V16 Update 4 are affected, please update the HMI Panel image as included in your installation of SINAMICS GH150 to V16 Update 4 or later version

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
CNAweakness (CWE)CWE-170read 2026-10-23
FIRST EPSSEPSS score4.0 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2019-03-08
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2019-8275?

Is CVE-2019-8275 actively exploited?

Active exploitation of CVE-2019-8275 has not been confirmed. Its EPSS score was 4.0% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-8275?

CVE-2019-8275 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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