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CVE-2019-8272

25
FAUCET Score

CVE-2019-8272 is a critical vulnerability affecting UltraVNC revision 1211 and several Siemens SINUMERIK products, stemming from multiple off-by-one errors in the VNC server code. This vulnerability carries a CVSS score of 9.8 (Critical) due to its network-exploitable nature, low attack complexity, and potential for complete compromise (confidentiality, integrity, and availability). While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), it has garnered some community discussion and media coverage, indicating awareness. Organizations using affected versions should prioritize updating to revision 1212 to mitigate this risk.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.2.2.3CPE matchmatch criteria
cpe:2.3:a:uvnc:ultravnc:*:*:*:*:*:*:*:*
< 4.8CPE matchmatch criteria
cpe:2.3:a:siemens:sinumerik_access_mymachine\/p2p:*:*:*:*:*:*:*:*
< 14.00CPE matchmatch criteria
cpe:2.3:a:siemens:sinumerik_pcu_base_win10_software\/ipc:*:*:*:*:*:*:*:*
<= 12.01CPE matchmatch criteria
cpe:2.3:a:siemens:sinumerik_pcu_base_win7_software\/ipc:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.92%
Probability of exploitation in next 30 days
EPSS Percentile
89.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0392 is in the 82nd percentile among its peer group of 36,897 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cert-portal.siemens.com / productcert/pdf/ssa-927095.pdf
Third Party Advisory
ics-cert.kaspersky.com / advisories/klcert-advisories/2019/03/01/klcert-19-019-ultravnc-off-by-one-error
Third Party Advisory
us-cert.gov / ics/advisories/icsa-20-161-06
Third Party AdvisoryUS Government Resource