Security readout for executives and security teams
Plain-English summary
This affects Linksys WRT120N routers running firmware 1.0.07. A reachable management endpoint can be abused without credentials to temporarily blank the administrator password, allowing unauthorized access to the router interface. Business risk is highest where these legacy routers still protect small offices, labs, or remote sites.
Executive priority
Treat as a moderate-priority legacy infrastructure risk. Prioritize sites where these routers are internet-exposed, shared across guest networks, or used for business-critical connectivity. Replacement may be more realistic than patching if vendor guidance is unavailable.
Technical view
The issue is a stack-based buffer overflow in tmUnblock.cgi triggered through an oversized TM_Block_URL POST parameter. Sources describe controlled memory corruption leading to a temporary blank administrator password. The CVSS v4.0 score is 5.3 with adjacent-network attack vector, no privileges, and no user interaction.
Likely exposure
Exposure is likely limited to legacy Linksys WRT120N version 1.0.07 devices with the web management interface reachable from local, adjacent, wireless, or exposed remote-management networks.
Exploitation context
Public exploit references exist, including Metasploit and Exploit-DB entries. The bundle does not show CISA KEV listing or cited evidence of active exploitation in the wild, so active exploitation should not be assumed.
Researcher notes
The record names one affected model and firmware version. Evidence supports public exploit availability and password-reset impact, but the source bundle does not identify a vendor patch, broad product family impact, or confirmed active exploitation.
Mitigation direction
- Identify and retire unsupported WRT120N devices where feasible.
- Check Linksys support guidance for firmware or replacement options.
- Disable WAN-facing remote administration if enabled.
- Restrict management access to trusted admin networks only.
- Change administrative credentials and review configuration after suspected exposure.
Validation and detection
- Inventory Linksys WRT120N devices and confirm firmware version 1.0.07.
- Verify whether the management interface is reachable from WAN, guest Wi-Fi, or untrusted LANs.
- Review device configuration for unexpected blank or changed administrator credentials.
- Confirm management access is restricted after remediation.
- Document unsupported devices accepted as residual risk.
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
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ATT&CK lookup starting points
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CWE-121: Exact CWE lookup
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Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2014-125122 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.3 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
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.
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:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
5.3MediumVector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
Source materials
- CVE List V5 sourceCVE List V5
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/auxiliary/admin/http/linksys_tmunblock_admin_reset_bof.rbCVE reference · exploit
- https://www.exploit-db.com/exploits/31758CVE reference · exploit
- https://web.archive.org/web/20210424073058/http://www.devttys0.com/2014/02/wrt120n-fprintf-stack-overflow/CVE reference · technical-description, exploit
- https://www.vulncheck.com/advisories/linksys-wrt120n-stack-based-buffer-overflow-admin-password-resetCVE reference · third-party-advisory
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.
Stack-based Buffer Overflow
Stack-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.