CVE-2025-57638: tenda ac9_firmware Heap-based Buffer Overflow
Analyzed
Published 23-09-2025Last modified 24-09-2025
Vulnerability summary
CVE-2025-57638 is a high (CVSS 7.5) Heap-based Buffer Overflow vulnerability in tenda ac9_firmware. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 32.7% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.5/10
010
High · v3.1 (CVE.org)EPSS score
0.40%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1github
Timeline
- 23-09-2025PublishedVulnerability first disclosed.
- 24-09-2025Last modifiedVulnerability information updated.
Description
Buffer overflow vulnerability in Tenda AC9 1.0 via the user supplied sys.vendor configuration value.
CVSS metrics
2 scores · 2 sources · 1 versionHigh 7.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 2 agree
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.40%
Chance of exploitation in the next 30 days
Percentile
33%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.40% on 22-09-2026
22-09-202622-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundIot Vulnerability
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Tenda1 product
- ac9_firmware1.0
1 vendor · 1 product