CVE-2025-63457: Stack-based Buffer Overflow
Source CVE Database V5
Not known to be exploited · CVSS 6.5 Medium.
Data as of 26 Oct 2026, 09:15 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 33% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 10 Nov 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
AI-suggested
1. Immediately isolate Tenda AX-1803 routers from direct WAN exposure by placing them behind firewalls or VPN gateways to restrict unsolicited inbound traffic targeting the wanMTU parameter. 2. Implement strict network segmentation to limit the impact of any potential DoS attack on critical systems. 3. Monitor network traffic for anomalous or malformed requests directed at the router’s WAN interface, especially those attempting to manipulate MTU settings. 4. Engage with Tenda support channels to obtain firmware updates or patches as soon as they become available; prioritize testing and deployment of these updates. 5. Consider replacing vulnerable devices with alternative routers that have verified security postures if patching is delayed. 6. Employ intrusion detection/prevention systems (IDS/IPS) capable of detecting buffer overflow attack patterns targeting network devices. 7. Maintain up-to-date network device inventories to quickly identify and remediate affected hardware. 8. Educate IT staff on the specific nature of this vulnerability to enhance incident response readiness.
Description
Tenda AX-1803 v1.0.0.1 was discovered to contain a stack overflow via the wanMTU parameter in the sub_4F55C function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request.