Exploited vulnerabilities / CVE-2026-20122
Confirmed exploited · privilege escalation · Cisco Catalyst SD-WAN MangerCVE-2026-20122
Cisco Catalyst SD-WAN Manger privilege escalation, confirmed exploited in the wild.
Cisco Catalyst SD-WAN Manager contains an incorrect use of privileged APIs vulnerability due to improper file handling on the API interface of an affected system. An attacker could exploit this vulnerability by uploading a malicious file on the local file system. A successful exploit could allow the attacker to overwrite arbitrary files on the affected system and gain vmanage user privileges.
| CISA's name for it | Cisco Catalyst SD-WAN Manager Incorrect Use of Privileged APIs Vulnerability |
|---|---|
| Vendor and product | Cisco · Catalyst SD-WAN Manger |
| Type | privilege escalation · CWE-648 |
| 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. |
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Know before someone else finds it
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CVE-2026-20122 in short
Is CVE-2026-20122 being exploited?
Yes. CISA added CVE-2026-20122 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-2026-20122?
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-2026-20122 to be exploited in the next 30 days?
FIRST's Exploit Prediction Scoring System gives it 26%, the 98th percentile of every CVE it scores.
How do I fix CVE-2026-20122?
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.