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CVE-2022-20855

23
FAUCET Score

CVE-2022-20855 is a medium-severity vulnerability affecting Cisco IOS XE Software for Embedded Wireless Controllers on Catalyst Access Points. It allows an authenticated, local attacker with privilege level 15 credentials to escape the restricted controller shell and execute arbitrary commands as root on the underlying operating system. This is due to improper checks during the self-healing functionality's restart of system processes. While the CVSS score is 6.7, indicating a high impact on confidentiality, integrity, and availability, there is currently no public exploit code available, and it is not being actively exploited. Community discussion and media coverage for this CVE are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
17.6.1CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xe:17.6.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.9HIGH

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.5
Impact Score
5.8
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.35%
Probability of exploitation in next 30 days
EPSS Percentile
27.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0035 is in the 76th percentile among its peer group of 3,720 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-ewc-priv-esc-nderYLtK
Vendor Advisory