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CVE-2021-45994

24
FAUCET Score

CVE-2021-45994 is a stack overflow vulnerability found in Tenda G1 and G3 routers running firmware version v15.11.0.17(9502)_CN. This flaw allows an unauthenticated attacker to trigger a Denial of Service (DoS) by manipulating the delDhcpIndex parameter within the formDelDhcpRule function. Rated 7.5 HIGH, the vulnerability is easily exploitable over the network with low complexity and no user interaction required, leading to a complete loss of availability. There is currently no evidence of active exploitation, nor are there publicly available exploit modules or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
15.11.0.17\(9502\)_cnCPE matchmatch criteria
cpe:2.3:o:tendacn:g1_firmware:15.11.0.17\(9502\)_cn:*:*:*:*:*:*:*
15.11.0.17\(9502\)_cnCPE matchmatch criteria
cpe:2.3:o:tendacn:g3_firmware:15.11.0.17\(9502\)_cn:*:*:*:*:*:*:*

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:N/I:N/A:H

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

Exploit Intelligence

EPSS Score
1.05%
Probability of exploitation in next 30 days
EPSS Percentile
60.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0105 is in the 38th percentile among its peer group of 51,553 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

Remediation records are not available for this CVE.

References

github.com / pjqwudi/my_vuln/blob/main/Tenda/vuln_12/12.md
Broken Link
exchange.xforce.ibmcloud.com / vulnerabilities/218934
Third Party Advisory