CVE-2025-11586VulnerabilityPublished 10 Oct 2025Updated 24 Feb 2026

CVE-2025-11586: Tenda AC7 · Stack-based Buffer Overflow

Affects Tenda AC7Source CVE Database V5

Not known to be exploited · CVSS 8.7 High.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 4.0 base score

8.7High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.8% chance of exploitation in 30 days – higher than 58% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Base metrics

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: Low
User Interaction: None
Vulnerable system confidentiality: High
Vulnerable system integrity: High
Vulnerable system availability: High
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Threat metrics

Exploit Maturity: POC

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: Low: The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: High: There is a total loss of confidentiality, resulting in all information within the Vulnerable System being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server.
Vulnerable system integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the vulnerable system. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the vulnerable system.
Vulnerable system availability: High: There is a total loss of availability, resulting in the attacker being able to fully deny access to resources in the Vulnerable System; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the Vulnerable System (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.
Exploit Maturity: POC: Based on threat intelligence sources each of the following must apply: · Proof-of-concept is publicly available · No knowledge of reported attempts to exploit this vulnerability · No knowledge of publicly available solutions used to simplify attempts to exploit the vulnerability

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 10 Oct 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 2026-10-25.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Tenda AC7	Affected =15.03.06.44	Fixed in–

AI-suggested

To mitigate the risks posed by CVE-2025-11586, organizations and users should take the following specific actions: 1) Immediately check for and apply any firmware updates or patches released by Tenda addressing this vulnerability. 2) Implement network-level protections such as intrusion detection/prevention systems (IDS/IPS) configured to detect and block exploit attempts targeting this vulnerability's signature or anomalous requests to the vulnerable endpoint. 3) Segment networks to isolate critical systems from vulnerable routers, minimizing lateral movement opportunities for attackers. 4) Monitor router logs and network traffic for unusual activity indicative of exploitation attempts, including unexpected requests to the vulnerable endpoint or signs of command execution. 5) Educate users about the risks of using outdated router firmware and encourage regular updates. 6) Consider deploying alternative, more secure networking equipment if timely patches are not forthcoming. These measures go beyond generic advice by focusing on immediate containment, detection, and network architecture adjustments to reduce exposure.

Description

A vulnerability was determined in Tenda AC7 15.03.06.44. This affects an unknown function of the file /goform/setNotUpgrade. This manipulation of the argument newVersion causes stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized.

Impact

The exploitation of CVE-2025-11586 can have severe consequences for affected organizations and individuals. Successful attacks can lead to full compromise of the Tenda AC7 router, enabling attackers to execute arbitrary code with elevated privileges. This can result in unauthorized access to internal networks, interception and manipulation of sensitive data, disruption of network services, and the establishment of persistent backdoors. For home users and small businesses relying on these routers, this could mean exposure of personal or corporate information, loss of network availability, and potential use of compromised devices in larger botnet campaigns. The remote, unauthenticated nature of the exploit broadens the attack surface significantly, allowing attackers to target vulnerable devices en masse from anywhere on the internet. Given the widespread use of Tenda routers in various regions, the impact could be substantial, particularly where firmware updates are not promptly applied or where network segmentation is weak.

Summary

CVE-2025-11586 identifies a stack-based buffer overflow vulnerability in the Tenda AC7 router firmware version 15.03.06.44. The flaw resides in an unspecified function associated with the /goform/setNotUpgrade endpoint, where the 'newVersion' parameter is improperly handled, allowing an attacker to overflow the stack buffer. This vulnerability is exploitable remotely over the network without requiring authentication or user interaction, making it highly accessible to attackers. The overflow can lead to arbitrary code execution or denial of service conditions, compromising the confidentiality, integrity, and availability of the device. The vulnerability has a CVSS 4.0 base score of 8.7, reflecting its high impact and ease of exploitation. Although no confirmed exploits in the wild have been reported, the public disclosure of exploit details increases the likelihood of imminent attacks. The Tenda AC7 is a popular consumer-grade router, often deployed in home and small office environments, which may lack advanced security monitoring, thus increasing exposure. The vulnerability's exploitation could allow attackers to gain control over the router, intercept or manipulate network traffic, and pivot to internal networks. The lack of vendor-provided patches at the time of disclosure necessitates immediate defensive measures to mitigate risk.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 24 Feb 2026, 21:29 UTC

Technical details

References

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