HOMEVULNERABILITIESCVE-2020-8703
MEDIUM

CVE-2020-8703

CWE-119Published: June 9, 2021· Updated: Jun 17, 2026

6.7
CVSS v3.1

Official Description

Improper buffer restrictions in a subsystem in the Intel(R) CSME versions before 11.8.86, 11.12.86, 11.22.86, 12.0.81, 13.0.47, 13.30.17, 14.1.53, 14.5.32 and 15.0.22 may allow a privileged user to potentially enable escalation of privilege via local access.

NVD Source

Technical Analysis

CVE-2020-8703 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 6.7.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.High
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

intel343 product(s)
converged security and manageability engineb360b365c242c246celeron 4205uceleron 4305uceleron 4305uecore i3-8100core i3-8100bcore i3-8100hcore i3-8100t+331
netapp1 product(s)
cloud backup
siemens24 product(s)
simatic field pg m6 firmwaresimatic field pg m6simatic field pg m5 firmwaresimatic field pg m5simatic ipc427e firmwaresimatic ipc427esimatic ipc477e firmwaresimatic ipc477esimatic ipc477e pro firmwaresimatic ipc477e prosimatic ipc527g firmwaresimatic ipc527g+12
Source: NVD CPE · 368 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://cert-portal.siemens.com/productcert/pdf/ssa-309571.pdf
ADVISORYhttps://security.netapp.com/advisory/ntap-20210611-0004/
ADVISORYhttps://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00459.html
ADVISORYhttps://cert-portal.siemens.com/productcert/pdf/ssa-309571.pdf
ADVISORYhttps://security.netapp.com/advisory/ntap-20210611-0004/
ADVISORYhttps://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00459.html

All References (6)

→
https://cert-portal.siemens.com/productcert/pdf/ssa-309571.pdfThird Party Advisory
→
https://security.netapp.com/advisory/ntap-20210611-0004/Third Party Advisory
→
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00459.htmlVendor Advisory
→
https://cert-portal.siemens.com/productcert/pdf/ssa-309571.pdfThird Party Advisory
→
https://security.netapp.com/advisory/ntap-20210611-0004/Third Party Advisory
→
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00459.htmlVendor Advisory

Quick Facts

CVE IDCVE-2020-8703
CVSS Score6.7 / 10
SeverityMEDIUM
WeaknessCWE-119
CISA KEVNo
Affected3 vendor(s)
PublishedJun 9, 2021

Related CVEs (CWE-119)

CVE-2012-5964
10.0
CVE-2002-2251
10.0
CVE-2012-5965
10.0
CVE-2008-4556
10.0
CVE-2001-0803
10.0
CVE-2012-5963
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-8703 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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