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CVE-2019-8276

21
FAUCET Score

CVE-2019-8276 is a stack buffer overflow vulnerability in the UltraVNC server's file transfer handler (revision 1211 and earlier), impacting various Siemens SINUMERIK and UVNC products. This flaw allows an unauthenticated attacker to trigger a Denial of Service (DoS) by sending a specially crafted network request. While the CVSS score of 7.5 (HIGH) indicates significant potential impact, there is no evidence of active exploitation, public exploit code, or inclusion in CISA's KEV catalog. Community discussion and media coverage are minimal, suggesting low current attention.

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

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
5.72%
Probability of exploitation in next 30 days
EPSS Percentile
92.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0572 is in the 87th percentile among its peer group of 51,553 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 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-19-023-ultravnc-stack-based-buffer-overflow
Third Party Advisory
us-cert.gov / ics/advisories/icsa-20-161-06
Third Party AdvisoryUS Government Resource