CVE-2026-18577
Confirmed PUBLISHEDIncomplete patch leads to administrative account takeover
2 hours faster than CISA KEV
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
An incomplete patch for CVE-2026-18556 allows for authentication bypass and account takeover in N-central Versions through 2026.3.1
- CVE Published
- Aug 02, 2026
- Exploitation Reported
- Aug 03, 2026
- CVSS
- 8.2 High
- EPSS
- 1.5%
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| N-able |
N-central
|
0 to <= 2026.3 |
Affected |
| N-able |
N-central
|
2026.3.1.7 |
Unaffected |
CVE References
- documentation.n-able.com/N-central/Release_Notes/GA/Content/N-central... documentation.n-able.com · CVE Record https://documentation.n-able.com/N-central/Release_Notes/GA/Content/N...
- status.n-able.com/2026/08/02/n-central-2026-3-hotfix-1-mitigat... status.n-able.com · CVE Record https://status.n-able.com/2026/08/02/n-central-2026-3-hotfix-1-mitiga...
- cve.org/CVERecord cve.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2026-18556
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| BleepingComputer First | 2026-08-03 17:00 UTC |
| CISA | 2026-08-03 18:55 UTC |
| CVE | 2026-08-03 20:21 UTC |
No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS: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
Exploitation Status
Exploited in the wild
Recorded 2026-08-03 18:55:09 UTC · CISA
Weaknesses (CWE)
-
Authentication Bypass Using an Alternate Path or Channel
Recent Mentions
Dark Reading · Aug 03, 2026
Over the weekend, the vendor discovered another vector of authentication bypass CVE-2026-18577 that gives attackers administrator access.
BleepingComputer · Aug 03, 2026
N-able is warning customers that hackers are exploiting an authentication bypass vulnerability (CVE-2026-18577) affecting both hosted and on-premises N-central servers. [...]
TheHackerNews · Aug 03, 2026
N-able said attackers exploited an authentication bypass in N-central to gain remote administrative access and reach the customer systems managed through those servers. Its first fix was incomplete. CVE-2026-18577 affects N-central builds prior to 2026.3.1.7. N-able shipped build 2026.3.1.7 on August 2 as the first unaffected version. N-central is the remote monitoring and management platform
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
20:21 UTC about 5 hours ago20:21 UTC · about 5 hours ago
KEV confirmed by CVE
Exploitation attested by an external source
-
18:55 UTC about 6 hours ago18:55 UTC · about 6 hours ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
17:00 UTC about 8 hours ago17:00 UTC · about 8 hours ago
Added to KEVIntel KEV Feed
High-confidence, third-party attested exploitation
-
22:06 UTC 1 day ago22:06 UTC · 1 day ago
CVE published
Vulnerability disclosed publicly
-
13:40 UTC 1 day ago13:40 UTC · 1 day ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2026-18577
{
"cve_id": "CVE-2026-18577",
"title": "Incomplete patch leads to administrative account takeover",
"affected_vendor": "N-able",
"affected_product": "N-central",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 8.2,
"epss_score": 0.01477,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}