Security readout for executives and security teams
Plain-English summary
CVE-2024-40495 affects Linksys E2500 routers running firmware 2.0.00. An authenticated attacker could execute arbitrary code through a parental-control unblock function. That could let an attacker take control of the device if they already have low-privilege authenticated access from an adjacent network path.
Executive priority
Prioritize any confirmed E2500 firmware 2.0.00 deployments, especially in offices, branch sites, or home-office environments. The vulnerability can lead to full device compromise, but evidence of active exploitation is not provided in the source bundle.
Technical view
The CVE describes CWE-94 code execution in hnd_parentalctrl_unblock on Linksys Router E2500 firmware 2.0.00. CVSS 3.1 is 8.0 with AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, indicating adjacent-network reachability, low complexity, low privileges, no user interaction, and high confidentiality, integrity, and availability impact.
Likely exposure
Confirmed exposure is limited to Linksys Router E2500 firmware 2.0.00 based on the provided sources. The bundle does not identify CPEs, other affected versions, or a vendor patch. Risk is highest where router administration is reachable by users on the local or wireless network.
Exploitation context
CISA KEV status is false, and the supplied sources do not state active exploitation. A public GitHub-hosted technical PDF is referenced, so defenders should assume details are publicly available, while treating real-world exploitation as unconfirmed.
Researcher notes
The source data is sparse: affected vendor/product fields are n/a despite the description naming Linksys E2500 firmware 2.0.00. No patch, mitigation, exploit-in-the-wild claim, or broader version range is cited. Validate against the CVE record and referenced PDF before expanding scope.
Mitigation direction
- Check Linksys guidance for firmware updates or end-of-support status.
- Restrict router administration to trusted management networks only.
- Disable remote administration where it is not required.
- Use strong, unique administrator credentials on affected routers.
- Replace or isolate devices if no supported fix exists.
Validation and detection
- Inventory Linksys E2500 routers and record firmware versions.
- Identify any devices running firmware 2.0.00.
- Confirm management interfaces are not reachable by untrusted local users.
- Review router administration logs for unexpected authenticated activity.
- Track CVE and vendor sources for updated remediation guidance.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-94: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2024-40495 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H2.15.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
8HighVector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/iotaMing/IOT-CVE/blob/master/Linksys/CVE-2024-40495/CVE-2024-40495.pdfCVE reference, mitre
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.