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CVE-2020-0688

A remote code execution vulnerability exists in Microsoft Exchange software when the software fails to properly handle objects in memory, aka 'Microsoft Exchange Memory Corruption Vulnerability'.

CVSS 8.8 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.8/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 8.8: +1.32
  • Fresh EPSS: 99.95%: +0.50

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

Qualys
Press · 06 May 2022, 07:00 · CISA Alert: Top 15 Routinely Exploited Vulnerabilities - Qualys
The Hacker News
Press · 29 Jul 2021, 07:00 · Top 30 Critical Security Vulnerabilities Most Exploited by Hackers - The Hacker News
www.trendmicro.com
Press · 28 Apr 2021, 07:00 · Manage Zero Day Exploits (ZDI) with Trend Micro Solutions - www.trendmicro.com
Help Net Security
Press · 03 Feb 2021, 08:00 · Top 10 most exploited vulnerabilities from 2020 - Help Net Security
www.trendmicro.com
Press · 29 Jan 2021, 08:00 · Chopper ASPX Web Shell Used in Targeted Attack - www.trendmicro.com
See all 9 source documents
www.trendmicro.com
Press · 29 Jan 2021, 08:00 · Chopper ASPX Web Shell Used in Targeted Attack - www.trendmicro.com
Rapid7
Press · 06 Apr 2020, 07:00 · Phishing for SYSTEM on Microsoft Exchange (CVE-2020-0688) - Rapid7
thezdi.com
Press · 25 Feb 2020, 08:00 · CVE-2020-0688: Remote Code Execution on Microsoft Exchange Server Through Fixed Cryptographic Keys - thezdi.com
thezdi.com
Press · 11 Feb 2020, 08:00 · The February 2020 Security Update Review - thezdi.com

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 8.8 (2026-11-02 15:12). The curve appears once the score changes.

Public exploit evidence

3

Public exploit entries / repo candidates

See 3 repos with metrics
RepositoryStarsForksLanguageUpdated
zyn3rgy/ecp_slap111Go19 Nov 2024, 21:09
justin-p/PSForgot2kEyXCHANGE56PowerShell05 Mar 2020, 08:02
ktpdpro/CVE-2020-068832—22 Apr 2020, 01:09
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 8.8; EPSS 100.0%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, low privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:11.176807+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
First press mention
11 Feb 2020, 08:00
Published
11 Feb 2020, 21:22
Added to the CISA KEV catalog
03 Nov 2021, 00:00
Latest press mention
06 May 2022, 07:00
Score calculated
05 Nov 2026, 13:58
PoCs on GitHub
3 repositories