Page generated: 08 Nov 2026, 08:06 UTC
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CVE-2026-41940

cPanel and WHM versions after 11.40 contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.

CVSS 9.8 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
2.5/10
REALITY · THREAT PRIORITY
9.0/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 9.8: +1.47
  • Fresh EPSS: 98.53%: +0.49

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

Sources: 28 documents and public datasets.

Hype components

Headline sample (25%)
90/100
Press, 30 days (60%)
5/100
Grounded branding (15%)
0/100
HYPE TOTAL26/100

Sources and documents

www.theregister.com - Articles
Press · 26 Oct 2026, 22:29 · Worm armed 42 GitHub repos by hiding a payload too big to fail
Barracuda Blog
Press · 03 Sep 2026, 07:00 · cPanel authentication bypass exposes the growing risk of identity centric attacks - Barracuda Blog
shattered.io
Press · 22 Jun 2026, 13:59 · CVE-2026-41940: cPanel Auth Bypass Exposes 1.5M Servers, CVSS 9.8 [2026] - shattered.io
Rescana
Press · 12 May 2026, 07:00 · CVE-2026-41940: Active Exploitation of cPanel/WHM Authentication Bypass to Deploy Filemanager Backdoor - Rescana
Help Net Security
Press · 12 May 2026, 07:00 · Stealthy hackers exploit cPanel flaw in active backdoor campaign (CVE-2026-41940) - Help Net Security
See all 28 source documents
Security Affairs
Press · 12 May 2026, 07:00 · Attackers exploit cPanel CVE-2026-41940 to deploy Filemanager Backdoor - Security Affairs
The Hacker News
Press · 11 May 2026, 07:00 · cPanel CVE-2026-41940 Under Active Exploitation to Deploy Filemanager Backdoor - The Hacker News
奇安信X 实验室
Press · 11 May 2026, 07:00 · Threat Actor Mr_Rot13 Actively Exploits CVE-2026-41940 for Backdoor Deployment - 奇安信X 实验室
IT Security Guru
Press · 08 May 2026, 07:00 · Pentest-Tools.com Releases Free Scanner for CVE-2026-41940 as cPanel Authentication Bypass Enters Its Third Week of Active Exploitation - IT Security Guru
Security Affairs
Press · 04 May 2026, 07:00 · Hackers target governments and MSPs via critical cPanel flaw CVE-2026-41940 - Security Affairs
SecurityWeek
Press · 04 May 2026, 07:00 · Over 40,000 Servers Compromised in Ongoing cPanel Exploitation - SecurityWeek
Help Net Security
Press · 04 May 2026, 07:00 · Multiple threat actors actively exploit cPanel vulnerability (CVE-2026-41940) - Help Net Security
Cybersecurity Dive
Press · 04 May 2026, 07:00 · Critical vulnerability in cPanel leads to widespread exploitation - Cybersecurity Dive
The Hacker News
Press · 04 May 2026, 07:00 · Critical cPanel Vulnerability Weaponized to Target Government and MSP Networks - The Hacker News
Arctic Wolf
Press · 30 Apr 2026, 21:10 · Recommendation for CVE-2026-41940 - Arctic Wolf
SecurityWeek
Press · 30 Apr 2026, 07:00 · Critical cPanel & WHM Vulnerability Exploited as Zero-Day for Months - SecurityWeek
TechRadar
Press · 30 Apr 2026, 07:00 · 'The Internet is falling down': Critical cPanel CRLF injection vulnerability puts tens of millions of websites at risk of total compromise – hosting providers urged to apply CVE-2026-41940 patch immediately - TechRadar
CyberScoop
Press · 30 Apr 2026, 07:00 · cPanel’s authentication bypass bug is being exploited in the wild, CISA warns - CyberScoop
Pasquale Pillitteri
Press · 30 Apr 2026, 07:00 · Hacked! CVE-2026-41940: cPanel & WHM Authentication Bypass and How to Protect Your Server - Pasquale Pillitteri
Bitsight
Press · 30 Apr 2026, 07:00 · Critical Vulnerability Alert: CVE-2026-41940 in cPanel, WHM, and WP Squared - Bitsight
Help Net Security
Press · 30 Apr 2026, 07:00 · cPanel zero-day exploited for months before patch release (CVE-2026-41940) - Help Net Security
watchTowr Labs
Press · 29 Apr 2026, 17:19 · The Internet Is Falling Down, Falling Down, Falling Down (cPanel & WHM Authentication Bypass CVE-2026-41940)
watchTowr Labs
Press · 29 Apr 2026, 17:19 · The Internet Is Falling Down, Falling Down, Falling Down (cPanel & WHM Authentication Bypass CVE-2026-41940)
watchTowr Labs
Press · 29 Apr 2026, 07:00 · The Internet Is Falling Down, Falling Down, Falling Down (cPanel & WHM Authentication Bypass CVE-2026-41940) - watchTowr Labs
The Hacker News
Press · 29 Apr 2026, 07:00 · Critical cPanel Authentication Vulnerability Identified — Update Your Server Immediately - The Hacker News
watchTowr
Press · 29 Apr 2026, 07:00 · Rapid Reaction: cPanel Authentication Bypass Vulnerability (CVE-2026-41940) - watchTowr
Rapid7
Press · 29 Apr 2026, 07:00 · CVE-2026-41940: cPanel & WHM Authentication Bypass - Rapid7
SOC Prime
Press · 28 Apr 2026, 07:00 · CVE-2026-41940: cPanel & WHM Auth Bypass Flaw - SOC Prime

Score evolution

● Hype   ● Reality

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

First record: hype 2.5 · reality 9.0 (2026-11-02 15:14). The curve appears once the score changes.

Public exploit evidence

15

Public exploit entries / repo candidates

See 15 repos with metrics
RepositoryStarsForksLanguageUpdated
XsanFlip/poc-cpanel-cve-2026-419406311Python01 May 2026, 16:35
adriyansyah-mf/cve-2026-41940-poc2814Python30 Apr 2026, 02:47
ZeroDayEvil/CVE-2026-41940-PoC281—19 Oct 2026, 07:44
realawaisakbar/CVE-2026-41940-Exploit-PoC126Python30 Apr 2026, 10:05
tc4dy/CVE-2026-41940-PoC-Exploit124Python13 Oct 2026, 04:19
0xYuR1/CVE-2026-4194092Python16 May 2026, 10:26
murrez/CVE-2026-4194081Python12 May 2026, 06:28
Ishanoshada/CVE-2026-41940-Exploit-PoC21Go02 May 2026, 22:06
nickpaulsec/2026-41940-poc10Python04 May 2026, 11:28
zedxod/CVE-2026-41940-POC10Python30 Apr 2026, 21:44
hitechcloud-vietnam/cve-2026-41940-PoC00Python06 Oct 2026, 14:27
imbas007/POC_CVE-2026-4194001Python03 May 2026, 13:28
rdyprtmx/poc-cve-2026-4194000—30 Apr 2026, 06:24
Xrzmodz444/cve-2026-41940-PoC-Linux01Python09 Sep 2026, 18:08
ylerpeek/CVE-2026-41940-PoC-30142—15 Oct 2026, 12:44
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 9.8; EPSS 98.5%
Attention, last 30 days
1 distinct story titles; 1 press documents; 1 publisher domains.
Technical potential
network access, no prior 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 14:00:10.041099+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
First press mention
28 Apr 2026, 07:00
Published
29 Apr 2026, 15:10
Added to the CISA KEV catalog
30 Apr 2026, 00:00
Latest press mention
26 Oct 2026, 22:29
Score calculated
05 Nov 2026, 14:00
PoCs on GitHub
15 repositories