CVE-2026-51846: tenda ac7_firmware Stack-based Buffer Overflow
Analyzed
Published 19-06-2026Last modified 22-06-2026
Vulnerability summary
CVE-2026-51846 is a critical (CVSS 9.8) Stack-based Buffer Overflow vulnerability in tenda ac7_firmware. EPSS estimates a 0.84% chance of exploitation in the next 30 days, higher than 57.5% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)EPSS score
0.84%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1reference
Timeline
- 19-06-2026PublishedVulnerability first disclosed.
- 22-06-2026Last modifiedVulnerability information updated.
Description
In Tenda AC7 v15.03.06.44, the wanSpeed parameter of the route /goform/AdvSetMacMtuWan has a stack buffer overflow vulnerability that can lead to remote arbitrary code execution.
CVSS metrics
2 scores · 2 sources · 1 versionCritical 9.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 2 agree
- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.84%
Chance of exploitation in the next 30 days
Percentile
58%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.84% 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 foundExploit Reference (kdev.site)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Tenda1 product
- ac7_firmware15.03.06.44
1 vendor · 1 product