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CVE-2025-8940

28
FAUCET Score

CVE-2025-8940 is a high-severity buffer overflow vulnerability (CVSS 8.8) affecting Tenda AC20 firmware up to version 16.03.08.12. This flaw, specifically within the strcpy function in /goform/saveParentControlInfo, allows a remote attacker to achieve high impact on confidentiality, integrity, and availability by manipulating the 'Time' argument. While public exploit code exists, there is currently no evidence of active exploitation, and it lacks significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 16.03.08.0, <= 16.03.08.12CPE matchmatch criteria
cpe:2.3:o:tenda:ac20_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

7.4HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
VS Confidentiality
HIGH
VS Integrity
HIGH
VS Availability
HIGH
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
PROOF_OF_CONCEPT
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.85%
Probability of exploitation in next 30 days
EPSS Percentile
54.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0085 is in the 49th percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 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 / lin-3-start/lin-cve/blob/main/Tenda%20AC20-2/Tenda%20AC20-2.md
ExploitThird Party Advisory
github.com / lin-3-start/lin-cve/blob/main/Tenda%20AC20-2/Tenda%20AC20-2.md
ExploitThird Party Advisory
vuldb.com
Permissions RequiredVDB Entry
vuldb.com
Third Party AdvisoryVDB Entry
vuldb.com
Third Party AdvisoryVDB Entry
tenda.com.cn
Product