CVE-2021-20093
CriticalPublic PoC
Published: 16 June 2021
Published
16 June 2021
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1
9.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
EPSS Score
0.0820
92.4th percentile
Risk Priority
23
60% EPSS · 20% KEV · 20% CVSS
Summary
CVE-2021-20093 is a critical-severity Out-of-bounds Read (CWE-125) vulnerability in Siemens Sinema Remote Connect Server. Its CVSS base score is 9.1 (Critical).
Operationally, ranked in the top 7.6% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-7550
Vulnerability details
A buffer over-read vulnerability exists in Wibu-Systems CodeMeter versions < 7.21a. An unauthenticated remote attacker can exploit this issue to disclose heap memory contents or crash the CodeMeter Runtime Server.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
wibu
codemeter
≤ 7.21a
siemens
pss cape
all versions
siemens
sicam 230 firmware
all versions
siemens
simatic information server
2019, 2020
siemens
simatic pcs neo
≤ 3.1
siemens
simatic wincc oa
3.17, 3.18
siemens
simit simulation platform
10.3 · 10.0 — 10.3
siemens
sinec infrastructure network services
1.0.1 · ≤ 1.0.1.1
siemens
sinema remote connect server
3.0 · ≤ 3.0
siemens
simatic process historian
2020 · 2019 — 2020
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.