Exploited vulnerabilities / CVE-2026-20128
Confirmed exploited · privilege escalation · Cisco Catalyst SD-WAN ManagerCVE-2026-20128
Cisco Catalyst SD-WAN Manager privilege escalation, confirmed exploited in the wild.
Cisco Catalyst SD-WAN Manager contains a storing passwords in a recoverable format vulnerability that allows an authenticated, local attacker to gain DCA user privileges by accessing a credential file for the DCA user on the filesystem as a low-privileged user.
| CISA's name for it | Cisco Catalyst SD-WAN Manager Storing Passwords in a Recoverable Format Vulnerability |
|---|---|
| Vendor and product | Cisco · Catalyst SD-WAN Manager |
| Type | privilege escalation · CWE-257 |
| Exploited | Confirmed by CISA listed 20 April 2026 |
| Likelihood | one of the most likely to be exploited of every vulnerability tracked |
| Deadline | 23 April 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
Install the update on every affected system, servers and workstations alike.
Escalation bugs are chained after a first foothold: check for other exposures an attacker could start from.
Review who holds administrative rights, and alert on new ones.
| CISA's required action | Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlines 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. |
|---|
Know before someone else finds it
Threat Landscape Monitoring fingerprints the software your internet-facing hosts disclose and matches it, every day, against this list and the exploitation scores. When a new entry touches something you run, you are told once, with the host and the fix. The free plan covers one domain.
CVE-2026-20128 in short
Is CVE-2026-20128 being exploited?
Yes. CISA added CVE-2026-20128 to its Known Exploited Vulnerabilities catalogue on 20 April 2026, which it does only on evidence of exploitation in the wild.
What is the CISA deadline for CVE-2026-20128?
US federal agencies must remediate it by 23 April 2026. Everyone else should treat that date as the latest safe point to patch an internet-facing system.
How likely is CVE-2026-20128 to be exploited in the next 30 days?
FIRST's Exploit Prediction Scoring System gives it 8.3%, the 95th percentile of every CVE it scores.
How do I fix CVE-2026-20128?
Install the update on every affected system, servers and workstations alike. Escalation bugs are chained after a first foothold: check for other exposures an attacker could start from. Review who holds administrative rights, and alert on new ones.
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.