Page generated: 11 Nov 2026, 14:24 UTC
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CVE-2023-20867

A fully compromised ESXi host can force VMware Tools to fail to authenticate host-to-guest operations, impacting the confidentiality and integrity of the guest virtual machine.

CVSS 3.9 (LOW) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
7.7/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 3.9: +0.58
  • Fresh EPSS: 13.64%: +0.07

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

Sources: 13 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

Rescana
Press · 11 Feb 2026, 08:00 · UNC3886 Cyber Espionage Campaign Exploits Fortinet and VMware Zero-Days to Breach Singapore Telecom Sector - Rescana
wiz.io
Press · 16 Jun 2025, 19:46 · CVE-2023-20867 Impact, Exploitability, and Mitigation Steps - wiz.io
The Hacker News
Press · 19 Jun 2024, 07:00 · UNC3886 Uses Fortinet, VMware 0-Days and Stealth Tactics in Long-Term Spying - The Hacker News
Google Cloud
Press · 27 Mar 2024, 07:00 · Trends on Zero-Days Exploited In-the-Wild in 2023 - Google Cloud
The Stack
Press · 19 Jan 2024, 08:00 · vCenter Server vulnerability went exploited for two years unnoticed. Attacks are ongoing - The Stack
See all 13 source documents
Google Cloud
Press · 19 Jan 2024, 08:00 · Chinese Espionage Group UNC3886 Found Exploiting CVE-2023-34048 Since Late 2021 - Google Cloud
TechTarget
Press · 19 Jan 2024, 08:00 · Chinese threat group exploited VMware vulnerability in 2021 - TechTarget
Industrial Cyber
Press · 19 Jul 2023, 07:00 · Mandiant details Chinese cyber espionage hackers evolve stealth tactics to avoid detection - Industrial Cyber
TechTarget
Press · 13 Jun 2023, 07:00 · Mandiant: New VMware ESXi zero-day used by Chinese APT - TechTarget
BleepingComputer
Press · 13 Jun 2023, 07:00 · Chinese hackers used VMware ESXi zero-day to backdoor VMs - BleepingComputer
TechTarget
Press · 13 Jun 2023, 07:00 · Mandiant: New VMware ESXi zero-day used by Chinese APT - TechTarget
Google Cloud
Press · 13 Jun 2023, 07:00 · VMware ESXi Zero-Day Used by Chinese Espionage Actor to Perform Privileged Guest Operations on Compromised Hypervisors | Mandiant - Google Cloud
SecurityWeek
Press · 13 Jun 2023, 07:00 · Chinese Cyberspies Caught Exploiting VMware ESXi Zero-Day - SecurityWeek

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 7.7 (2026-11-02 15:13). The curve appears once the score changes.

Public exploit evidence

0

Public exploit entries / repo candidates

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 3.9; EPSS 13.6%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
local access, high privileges, no user interaction, additional attack conditions.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:49.717973+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
First press mention
13 Jun 2023, 07:00
Published
13 Jun 2023, 16:47
Added to the CISA KEV catalog
23 Jun 2023, 00:00
Latest press mention
11 Feb 2026, 08:00
Score calculated
05 Nov 2026, 13:58