Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2021-1423

18
FAUCET Score

CVE-2021-1423 is a medium-severity vulnerability affecting Cisco Aironet Access Points, stemming from insufficient input validation in a CLI command. An authenticated, local attacker could exploit this to overwrite or create files in the device's flash memory using crafted arguments. The CVSS score is 4.4, indicating a low attack complexity and high impact on integrity, but requiring high privileges. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:cisco:aironet_access_point_software:-:*:*:*:*:*:*:*
< 16.12.5CPE matchmatch criteria
cpe:2.3:o:cisco:catalyst_9800_firmware:*:*:*:*:*:*:*:*
>= 17.1, <= 17.2CPE matchmatch criteria
cpe:2.3:o:cisco:catalyst_9800_firmware:*:*:*:*:*:*:*:*
< 8.5.171.0CPE matchmatch criteria
cpe:2.3:a:cisco:wireless_lan_controller_software:*:*:*:*:*:*:*:*
>= 8.6, < 8.10.130.0CPE matchmatch criteria
cpe:2.3:a:cisco:wireless_lan_controller_software:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.4MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
0.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.23%
Probability of exploitation in next 30 days
EPSS Percentile
13.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0023 is in the 58th 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-ap-foverwrt-HyVXvrtb
Vendor Advisory