Exploited vulnerabilities / CVE-2026-20182
Confirmed exploited · authentication bypass · Cisco Catalyst SD-WANCVE-2026-20182
Cisco Catalyst SD-WAN authentication bypass, confirmed exploited in the wild.
Cisco Catalyst SD-WAN Controller & Manager contain an authentication bypass vulnerability that allows an unauthenticated, remote attacker to bypass authentication and obtain administrative privileges on an affected system.
| CISA's name for it | Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability |
|---|---|
| Vendor and product | Cisco · Catalyst SD-WAN |
| Type | authentication bypass · CWE-287 |
| Exploited | Confirmed by CISA listed 14 May 2026 |
| Likelihood | one of the most likely to be exploited of every vulnerability tracked |
| Deadline | 17 May 2026 · already passed |
| Used in ransomware | Not reported |
| Advisories | www.cisa.gov ↗ · www.cisa.gov ↗ · sec.cloudapps.cisco.com ↗ · nvd.nist.gov ↗ |
Three steps, in this order
Apply the vendor fix and restart the affected service.
Put the login or management interface behind a VPN or allow-list; a bypass makes passwords irrelevant.
Rotate credentials and session keys the product holds, and review accounts and configuration changes since the listing date.
| CISA's required action | Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlined in CISA’s Emergency Directive 26-03 (URL listed below in Notes) and CISA’s Hunt & Hardening Guidance for Cisco SD-WAN Devices (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available. |
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Know before someone else finds it
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CVE-2026-20182 in short
Is CVE-2026-20182 being exploited?
Yes. CISA added CVE-2026-20182 to its Known Exploited Vulnerabilities catalogue on 14 May 2026, which it does only on evidence of exploitation in the wild.
What is the CISA deadline for CVE-2026-20182?
US federal agencies must remediate it by 17 May 2026. Everyone else should treat that date as the latest safe point to patch an internet-facing system.
How likely is CVE-2026-20182 to be exploited in the next 30 days?
FIRST's Exploit Prediction Scoring System gives it 91%, the 99th percentile of every CVE it scores.
How do I fix CVE-2026-20182?
Apply the vendor fix and restart the affected service. Put the login or management interface behind a VPN or allow-list; a bypass makes passwords irrelevant. Rotate credentials and session keys the product holds, and review accounts and configuration changes since the listing date.
Other Cisco vulnerabilities being exploited
| CVE | Product | Type | Listed |
|---|---|---|---|
| CVE-2026-20320 | BroadWorks | exploited vulnerability | 10 November 2026 |
| CVE-2026-76418 | Secure Firewall ASA Software and Cisco Secure FTD Software | denial of service | 29 October 2026 |
| CVE-2026-76519 | Secure Email Gateway | path traversal | 14 October 2026 |
| CVE-2026-76504 | Catalyst SD-WAN Manager | privilege escalation | 30 September 2026 |
| CVE-2026-76460 | Identity Services Engine | privilege escalation | 16 September 2026 |
| CVE-2026-76461 | Secure Email Gateway | SQL injection | 14 September 2026 |
Sources: CISA Known Exploited Vulnerabilities catalogue (released 10 November 2026) and FIRST EPSS. Page compiled automatically by SAK T.L.M, the threat-intelligence tool of SAK T.E.C, on 13 November 2026.