CVE-2025-40838VulnerabilityPublished 25 Sep 2025Updated 30 Sep 2025

CVE-2025-40838: Ericsson Indoor Connect 8855 · Insufficiently Protected Credentials

Affects Ericsson Indoor Connect 8855Source CVE Database V5

Not known to be exploited · CVSS 5.1 Medium.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 4.0 base score

5.1Medium

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

EPSS: 0.3% chance of exploitation in 30 days – higher than 29% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: High
User Interaction: None
Vulnerable system confidentiality: None
Vulnerable system integrity: None
Vulnerable system availability: None
Subsequent system confidentiality: Low
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: High: The attacker requires privileges that provide significant (e.g., administrative) control over the vulnerable system allowing full access to the vulnerable system’s settings and files.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: None: There is no loss of confidentiality within the Vulnerable System.
Vulnerable system integrity: None: There is no loss of integrity within the Vulnerable System.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent 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 Subsequent 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 25 Sep 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
Ericsson Indoor Connect 8855	Affected =0	Fixed in–

AI-suggested

1. Network Segmentation: Isolate Ericsson Indoor Connect 8855 devices on dedicated network segments with strict access controls to limit exposure to untrusted networks. 2. Access Control: Restrict management interfaces to trusted administrators and internal networks only, using firewall rules and VPNs where applicable. 3. Monitoring and Logging: Implement enhanced monitoring of network traffic and device logs to detect unusual access patterns or attempts to exploit client-side vulnerabilities. 4. Credential Management: Regularly rotate credentials and avoid using default or weak passwords on the devices. 5. Vendor Coordination: Engage with Ericsson support to obtain updates on patches or firmware upgrades addressing CVE-2025-40838 and apply them promptly once available. 6. Device Hardening: Disable unnecessary services and interfaces on the Indoor Connect 8855 devices to reduce the attack surface. 7. Incident Response Planning: Prepare response procedures for potential credential compromise scenarios, including rapid containment and forensic analysis. These steps go beyond generic advice by focusing on network architecture, proactive monitoring, and vendor engagement specific to the Ericsson Indoor Connect 8855 environment.

Description

Ericsson Indoor Connect 8855 contains a vulnerability where server-side security can be bypassed in the client which if exploited can lead to unauthorized disclosure of certain information.

Impact

For European organizations, particularly those deploying Ericsson Indoor Connect 8855 devices in enterprise or public indoor environments such as offices, shopping centers, hospitals, or transportation hubs, this vulnerability poses a risk of unauthorized information disclosure. Although the CVSS vector indicates no direct impact on confidentiality, integrity, or availability, the CWE-522 classification and description suggest that credential leakage could facilitate lateral movement or unauthorized access within the network. This could undermine the security of private cellular networks, potentially exposing sensitive communications or enabling attackers to impersonate legitimate devices. The medium severity rating reflects a moderate risk, but the lack of required authentication and low attack complexity increase the likelihood of exploitation if the device is accessible from untrusted networks. Given the strategic importance of indoor cellular coverage for critical infrastructure and enterprise communications in Europe, exploitation could disrupt business operations or compromise sensitive data. However, the absence of known exploits and patches currently limits immediate risk, though organizations should prepare for potential future exploitation.

CWE-522Insufficiently Protected Credentials (opens in a new tab)
Class weaknessOWASP Top 10 A06:2025: Insecure Design (opens in a new tab)
The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval.
Architecture and Design
Use an appropriate security mechanism to protect the credentials.
Architecture and Design
Make appropriate use of cryptography to protect the credentials.
Implementation
Use industry standards to protect the credentials (e.g. LDAP, keystore, etc.).
OWASP Cheat Sheets
Secure Design Principles (opens in a new tab)
OWASP ASVS 4.0.3
V2.10.3 (opens in a new tab)
V2.8.5 (opens in a new tab)
V2.8.4 (opens in a new tab)
Attack patterns
Session Sidejacking (opens in a new tab)
Signature Spoofing by Key Theft (opens in a new tab)
Password Recovery Exploitation (opens in a new tab)
Kerberoasting (opens in a new tab)
Modify Existing Service (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

ericsson.com/en/about-us/security/psirt/e2025-09-25 (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 3 Oct 2025, 00:26 UTC

WeaknessesCWE-522

Technical details

References

Community reviews

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