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CVE-2026-18577

Incomplete patch leads to administrative account takeover

8.2 HighIn KEVPublic exploit

CVE-2026-18577 is a high vulnerability (CVSS 8.2) in N-able N-central, published August 2, 2026. CISA lists it as known to be exploited, since August 3, 2026. EUVD reports exploitation since August 3, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 14.6%, the 96th percentile. No source names a fixed version.

What does this mean?
Severity
8.2 HighCVSS 4.0, CVE List
Exploit chance
14.6%EPSS, 96th percentile
Exploitation
ExploitedCISA KEV,
Fixed in
No fix listedNo source names one
Discussion
0.2 SteadyBuzz score, 1 person today

Description

An incomplete patch for CVE-2026-18556 allows for authentication bypass and account takeover in N-central Versions through 2026.3.1

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

14.6%Up 13.1 points since Aug 3, 2026
90%50%10%1%

Discussion

Buzz score 0.2Steady, 1 person today
14 days ago: 0 people13 days ago: 0 people12 days ago: 0 people11 days ago: 0 people10 days ago: 1 person9 days ago: 0 people8 days ago: 0 people7 days ago: 0 people6 days ago: 0 people5 days ago: 0 people4 days ago: 1 person3 days ago: 0 people2 days ago: 0 people1 day ago: 0 peopleLast 24 hours: 1 person

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
PoC in GitHubHORKimhab/CVE-2026-185772026-08-04
NucleiN-able N-central < 2026.3.1.10 - Authentication Bypass

What each source reports

CVE List Score used8.2

Incomplete patch leads to administrative account takeover

An incomplete patch for CVE-2026-18556 allows for authentication bypass and account takeover in N-central Versions through 2026.3.1

Record
CVE-2026-18577
CVSS 4.0
8.2 HighCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:L/SA:L/E:A
Weakness
CWE-288
Updated
2026-11-02
EUVDEUVD-2026-520108.2

An incomplete patch for CVE-2026-18556 allows for authentication bypass and account takeover in N-central Versions through 2026.3.1

Record
EUVD-2026-52010
CVSS 4.0
8.2 HighCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:L/SA:L/E:A
Updated
2026-11-02
GitHub AdvisoriesGHSA-qgcm-97x5-6q8q8.2

An incomplete patch for CVE-2026-18556 allows for authentication bypass and account takeover in N...

An incomplete patch for CVE-2026-18556 allows for authentication bypass and account takeover in N-central Versions through 2026.3.1

Record
GHSA-qgcm-97x5-6q8q
CVSS 4.0
8.2 HighCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:L/SA:L/E:A/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-288
Updated
2026-11-02
CISA KEVNo score

N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability

N-able N-central contains an authentication bypass using an alternate path or channel allows for authentication bypass and account takeover in N-central. This vulnerability is the result of an incomplete patch for CVE-2026-18556.

Record
CVE-2026-18577
Weakness
CWE-288
Updated
2026-11-02
NVD8.2

An incomplete patch for CVE-2026-18556 allows for authentication bypass and account takeover in N-central Versions through 2026.3.1

Record
CVE-2026-18577
CVSS 4.0
8.2 HighCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:L/SA:L/E:A/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-288
Updated
2026-11-02

History

History
RecordedChangedSources
exploitation, exploits
first indexedCVE List, EUVD, GitHub Advisories, CISA KEV, Nuclei, NVD, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

References

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