Page generated: 09 Nov 2026, 07:06 UTC
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CVE-2020-1147

A remote code execution vulnerability exists in .NET Framework, Microsoft SharePoint, and Visual Studio when the software fails to check the source markup of XML file input, aka '.NET Framework, SharePoint Server, and Visual Studio Remote Code Execution Vulnerability'.

CVSS 7.8 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.6/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 7.8: +1.17
  • Fresh EPSS: 95.80%: +0.48

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 9 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

Field Effect
Press · 28 Jul 2025, 07:00 · ToolShell exploit chain targets Microsoft SharePoint Servers worldwide - Field Effect
Kaspersky
Press · 25 Jul 2025, 07:00 · Kaspersky reveals SharePoint ToolShell vulnerabilities stem from incomplete 2020 fix - Kaspersky
Securelist
Press · 25 Jul 2025, 07:00 · ToolShell: a story of five vulnerabilities in Microsoft SharePoint - Securelist
Qualys
Press · 22 Feb 2022, 08:00 · Managing CISA Known Exploited Vulnerabilities with Qualys VMDR - Qualys
CrowdStrike
Press · 30 Mar 2021, 07:00 · Vulnerability Roundup: 10 Critical CVEs of 2020 - CrowdStrike
See all 9 source documents
Security Affairs
Press · 23 Jul 2020, 07:00 · PoC Released for Critical CVE-2020-1147 flaw, SharePoint servers exposed to hack - Security Affairs
Help Net Security
Press · 21 Jul 2020, 07:00 · Details and PoC for critical SharePoint RCE flaw released - Help Net Security
TechTarget
Press · 15 Jul 2020, 07:00 · DNS Server vulnerability tops July Patch Tuesday concerns - TechTarget
Sophos
Press · 14 Jul 2020, 07:00 · It’s always DNS, including on July, 2020’s Patch Tuesday - Sophos

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.6 (2026-11-02 15:12). The curve appears once the score changes.

Public exploit evidence

2

Public exploit entries / repo candidates

Source entries and unverified repository candidates are counted separately.

Public exploit evidence
Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 7.8; EPSS 95.8%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
local access, no prior privileges, user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:12.189153+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
First press mention
14 Jul 2020, 07:00
Published
14 Jul 2020, 22:54
Added to the CISA KEV catalog
03 Nov 2021, 00:00
Latest press mention
28 Jul 2025, 07:00
Score calculated
05 Nov 2026, 13:58
PoCs on GitHub
2 repositories