CVE-2026-20133
A vulnerability in Cisco Catalyst SD-WAN Software could allow an unauthenticated, remote attacker to view sensitive information on an…
- Published
- Updated
- Reserved
- Assigned by
- cisco
Description
A vulnerability in Cisco Catalyst SD-WAN Software could allow an unauthenticated, remote attacker to view sensitive information on an affected system. This vulnerability is due to insufficient file system restrictions. An authenticated attacker with netadmin privileges could exploit this vulnerability by accessing the vshell of an affected system. A successful exploit could allow the attacker to read sensitive information on the underlying operating system.
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Cisco Catalyst SD-WAN Manager Exposure of Sensitive Information to an Unauthorized Actor Vulnerability.
- Added
- 20 Apr 2026
- Fix due (US federal)
- 23 Apr 2026
- Used by ransomware
- Not known
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.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. CISA's SSVC rates its exploitation: it is being exploited.
Timeline
ID reserved
By cisco
- 5 months later
· 5 months later
Published
- 54 days later
· 54 days later
Added to CISA KEV
Known exploited in the wild
- 2 days later
· 2 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| ciscoCNA (assigner) | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| NVDNVD · Analyzed | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 35.3% · top 1.5% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
Affected products
Cisco · Cisco Catalyst SD-WAN Manager
- affected 17.2.6
- affected 17.2.7
- affected 17.2.8
- affected 17.2.9
- affected 17.2.10
- affected 17.2.4
- affected 17.2.5
- affected 18.3.1.1
- affected 18.3.3.1
- affected 18.3.3
- affected 18.3.4
- affected 18.3.5
- affected 18.3.7
- affected 18.3.8
- affected 18.3.6.1
- affected 18.3.1
- affected 18.3.0
- affected 18.4.0.1
- affected 18.4.3
- affected 18.4.302
- affected 18.4.303
- affected 18.4.4
- affected 18.4.5
- affected 18.4.0
- affected 18.4.1
- affected 18.4.6
- affected 19.2.0
- affected 19.2.097
- affected 19.2.099
- affected 19.2.1
- affected 19.2.2
- affected 19.2.3
- affected 19.2.31
- affected 19.2.929
- affected 19.2.4
- affected 20.1.1.1
- affected 20.1.12
- affected 20.1.1
- affected 20.1.2
- affected 20.1.3
- and 121 more
What to do
Exploitation: In April 2026, the Cisco PSIRT became aware of active exploitation of the vulnerability that is described in CVE-2026-20133. Cisco strongly recommends that customers upgrade to a fixed software release to remediate these vulnerabilities.
References (2)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- CISA KEV catalog (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-20133)Record last updated .