CVE-2022-20805 json
Cisco Umbrella Secure Web Gateway File Decryption Bypass Vulnerability
published 2022-04-21 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-26055
- cvss
- 4.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 7%
- public exploits
- 0
- none known
Summary
A vulnerability in the automatic decryption process in Cisco Umbrella Secure Web Gateway (SWG) could allow an authenticated, adjacent attacker to bypass the SSL decryption and content filtering policies on an affected system. This vulnerability is due to how the decryption function uses the TLS Sever Name Indication (SNI) extension of an HTTP request to discover the destination domain and determine if the request needs to be decrypted. An attacker could exploit this vulnerability by sending a crafted request over TLS from a client to an unknown or controlled URL. A successful exploit could allow an attacker to bypass the decryption process of Cisco Umbrella SWG and allow malicious content to be downloaded to a host on a protected network. There are workarounds that address this vulnerability.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.1 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N |
| NVD | 3.1 | 4.1 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N |
| NVD | 2.0 | 2.7 | AV:A/AC:L/Au:S/C:N/I:P/A:N |
Affected products
- Cisco Cisco Umbrella Insights Virtual Appliance
Classification
References
Sources
- CVE List CVE-2022-20805
- NVD CVE-2022-20805
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