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CVE-2021-1437

24
FAUCET Score

CVE-2021-1437 is a high-severity vulnerability in the FlexConnect Upgrade feature of Cisco Aironet Series Access Points. It stems from an unrestricted TFTP configuration, allowing an unauthenticated, remote attacker to download any file from the affected device's filesystem. The vulnerability has a CVSS score of 7.5, indicating a high potential for confidential information disclosure. While no public exploits, Metasploit modules, or Nuclei templates are currently available, and there is minimal community discussion, organizations should still address this risk.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:cisco:aironet_access_point_software:-:*:*:*:*:*:*:*
>= 17.1, < 17.3.3CPE matchmatch criteria
cpe:2.3:o:cisco:catalyst_9800_firmware:*:*:*:*:*:*:*:*
>= 8.10.112.0, < 8.10.142.0CPE matchmatch criteria
cpe:2.3:a:cisco:wireless_lan_controller_software:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.49%
Probability of exploitation in next 30 days
EPSS Percentile
71.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0149 is in the 53rd percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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-aironet-info-disc-BfWqghj
Vendor Advisory