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Page generated: 09 Nov 2026, 04:20 UTC

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CVE-2022-41080

OWASSRF

Microsoft Exchange Server Elevation of Privilege Vulnerability

CVSS 8.8 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE

0.0/10

REALITY · THREAT PRIORITY

8.7/10

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: 77.33%: +0.39

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

Sources: 14 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

Sophos

Press · 15 Mar 2023, 07:00 · Observing OWASSRF Exchange Exploitation… still - Sophos

Bitdefender

Press · 24 Jan 2023, 08:00 · Technical Advisory: Proxy*Hell Exploit Chains in the Wild - Bitdefender

Cybersecurity Dive

Press · 11 Jan 2023, 08:00 · CISA adds Exchange Server, Windows vulnerabilities to catalog of exploited CVEs - Cybersecurity Dive

The Hacker News

Press · 06 Jan 2023, 08:00 · Rackspace Confirms Play Ransomware Gang Responsible for Recent Breach - The Hacker News

TechTarget

Press · 04 Jan 2023, 08:00 · Rackspace: Ransomware attack caused by zero-day exploit - TechTarget

See all 14 source documents

TechTarget

Press · 04 Jan 2023, 08:00 · Rackspace: Ransomware attack caused by zero-day exploit - TechTarget

Cybersecurity Dive

Press · 03 Jan 2023, 08:00 · Rackspace identifies ransomware threat actor behind December attack via Exchange - Cybersecurity Dive

Unit 42

Press · 22 Dec 2022, 08:00 · Threat Brief: OWASSRF Vulnerability Exploitation - Unit 42

wiz.io

Press · 22 Dec 2022, 08:00 · OWASSRF, a new exploit for Exchange vulnerabilities, exploited in the wild: everything you need to know - wiz.io

Arctic Wolf

Press · 22 Dec 2022, 00:08 · New Microsoft Exchange Exploit Chain via “OWASSRF” Leads to RCE - Arctic Wolf

Rapid7

Press · 21 Dec 2022, 08:00 · CVE-2022-41080, CVE-2022-41082: Rapid7 Observed Exploitation of `OWASSRF` in Exchange for RCE - Rapid7

The Hacker News

Press · 21 Dec 2022, 08:00 · Ransomware Hackers Using New Way to Bypass MS Exchange ProxyNotShell Mitigations - The Hacker News

Help Net Security

Press · 21 Dec 2022, 08:00 · New Microsoft Exchange exploit chain lets ransomware attackers in (CVE-2022-41080) - Help Net Security

CCB Belgium

Press · 21 Dec 2022, 08:00 · WARNING: Ransomware actors are actively exploiting a new exploit method dubbed OWASSRF, Patch Immediately - CCB Belgium

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 8.7 (2026-11-02 15:13). The curve appears once the score changes.

Public exploit evidence

Public exploit entries / repo candidates

See 1 repos with metrics

Repository	Stars	Forks	Language	Updated
balki97/OWASSRF-CVE-2022-41082-POC	92	35	Python	10 Jan 2023, 08:09

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 77.3%
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 13:58:43.617123+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline

Published

09 Nov 2022, 00:00

First press mention

21 Dec 2022, 08:00

Added to the CISA KEV catalog

10 Jan 2023, 00:00

Latest press mention

15 Mar 2023, 07:00

Score calculated

05 Nov 2026, 13:58

Name

OWASSRF

PoCs on GitHub

1 repositories