CVE-2019-8276 json
UltraVNC revision 1211 has a stack buffer overflow vulnerability in VNC server code inside file transfer request handler, which can result…
published 2019-03-08 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-17674
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 5.7%
- EPSS 5.7% chance of exploitation in 30 days, percentile 93%
- public exploits
- 0
- none known
Summary
UltraVNC revision 1211 has a stack buffer overflow vulnerability in VNC server code inside file transfer request handler, which can result in Denial of Service (DoS). This attack appears to be exploitable via network connectivity. This vulnerability has 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
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 7.5
Siemens SINUMERIK
-
Siemens SINUMERIK Access MyMachine /P2P <V4.8affected: fixed in V4.8, mitigation
-
Siemens SINUMERIK PCU base Win7 software /IPC <V12.01_HF4affected: fixed in V12.01, mitigation
-
Siemens SINUMERIK PCU base Win10 software /IPC <V14.00affected: 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
5.72% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Affected products
- Kaspersky Lab UltraVNC
Classification
References
-
ics-cert.kaspersky.com
/advisories/klcert-advisories/2019/03/01/klcert-19-023-ultravnc-stack-based-buffer-overflow/
third-party-advisory
-
cert-portal.siemens.com
/productcert/pdf/ssa-927095.pdf
third-party-advisory
-
us-cert.gov
/ics/advisories/icsa-20-161-06
third-party-advisory, us-government-resource
Sources
- CVE List CVE-2019-8276
- NVD CVE-2019-8276
Fencer Vulns 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.