CVE-2025-5439VulnerabilityPublished 2 Jun 2025

CVE-2025-5439: Linksys RE6500 · OS Command Injection

Affects Linksys RE6500Source CVE Database V5

Not known to be exploited · CVSS 5.3 Medium.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 4.0 base score

5.3Medium

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

EPSS: 5.0% chance of exploitation in 30 days – higher than 92% 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:L/VI:L/VA:L/SC:N/SI:N/SA:N

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

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: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the Vulnerable System.
Vulnerable system integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact to the Vulnerable System.
Vulnerable system availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the Vulnerable System are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the Vulnerable System.
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.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 2 Jun 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 2026-10-26.

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
Linksys RE6500	Affected =1.0.013.001 =1.0.04.001 =1.0.04.002 =1.1.05.003 =1.2.07.001	Fixed in–

AI-suggested

1. Immediate network segmentation: Isolate affected Linksys range extenders from critical internal networks to limit potential lateral movement if compromised. 2. Disable or restrict access to the /goform/verifyFacebookLike endpoint if possible, using firewall rules or device configuration to block external access. 3. Monitor network traffic for unusual activity originating from or targeting these devices, including unexpected command execution patterns or outbound connections. 4. Replace or upgrade affected devices with models from vendors that provide timely security updates and patches. 5. If replacement is not immediately feasible, consider deploying network intrusion detection/prevention systems (IDS/IPS) with signatures targeting known exploit patterns for this vulnerability. 6. Regularly audit and inventory network devices to identify vulnerable firmware versions and maintain an up-to-date asset management system. 7. Engage with Linksys support channels to demand patch releases and stay informed about any future security advisories. 8. Educate IT staff and users about the risks associated with unmanaged or outdated network devices to promote proactive security hygiene.

Description

A vulnerability was found in Linksys RE6500, RE6250, RE6300, RE6350, RE7000 and RE9000 1.0.013.001/1.0.04.001/1.0.04.002/1.1.05.003/1.2.07.001. It has been rated as critical. Affected by this issue is the function verifyFacebookLike of the file /goform/verifyFacebookLike. The manipulation of the argument uid/accessToken leads to os command injection. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Impact

For European organizations, this vulnerability poses a significant risk primarily to network security and operational continuity. Linksys range extenders are commonly used to improve Wi-Fi coverage in offices, retail locations, and home environments. Successful exploitation could allow attackers to execute arbitrary commands on these devices, potentially leading to unauthorized access to internal networks, interception or manipulation of network traffic, and disruption of wireless connectivity. This could facilitate lateral movement within corporate networks, data exfiltration, or service outages. Given the devices often operate at the network edge, compromise could undermine perimeter defenses. Additionally, many European organizations rely on these devices in remote or branch offices where direct IT oversight is limited, increasing the likelihood of unnoticed exploitation. The absence of vendor patches and public exploit disclosure further elevates the threat, as attackers can develop and deploy exploits without mitigation. While the CVSS score is medium, the real-world impact could be more severe depending on the network architecture and sensitivity of the data traversing these devices.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 9 Jul 2025, 12:55 UTC

Technical details

References

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