Security readout for executives and security teams
Plain-English summary
CVE-2025-60691 is a high-severity flaw in Linksys E1200 v2 router firmware. An unauthenticated attacker who can reach the router's HTTP service may crash it or potentially run code. The source bundle does not name a vendor fix or confirm active exploitation.
Executive priority
Prioritize identification and containment of affected routers. This is high risk because exploitation requires no credentials once the HTTP service is reachable, but the current source bundle does not confirm internet-scale exploitation or a named patch.
Technical view
The reported issue is a stack-based buffer overflow in the Linksys E1200 v2 httpd binary, firmware E1200_v2.0.11.001_us.tar.gz. apply_cgi and block_cgi copy the url CGI parameter into stack buffers using sprintf without bounds checks. CVSS 3.1 is 8.8 with AV:A/AC:L/PR:N/UI:N.
Likely exposure
Exposure appears limited to Linksys E1200 v2 devices running the cited firmware where the router HTTP service is reachable, especially from adjacent or local networks per the CVSS vector. The bundle does not provide CPEs, asset prevalence, or WAN exposure details.
Exploitation context
The CVE says unauthenticated crafted HTTP requests can trigger code execution or denial of service. CISA KEV status is false in the bundle, and no cited source confirms active exploitation. Public research is referenced, so defenders should treat details as discoverable.
Researcher notes
The source evidence centers on unsafe sprintf handling of the url CGI parameter in apply_cgi and block_cgi. Affected metadata is incomplete: vendor, product, versions, and CPE fields are listed as n/a despite the description naming Linksys E1200 v2 firmware.
Mitigation direction
- Check Linksys support for fixed firmware or official mitigation guidance.
- Restrict router management HTTP access to trusted administrative networks only.
- Disable remote administration if enabled and not required.
- Replace unsupported E1200 v2 devices if no fixed firmware is available.
- Monitor router logs and network traffic for unexpected management access.
Validation and detection
- Inventory Linksys E1200 v2 routers and record firmware versions.
- Confirm whether firmware E1200_v2.0.11.001_us.tar.gz or equivalent build is present.
- Verify the HTTP management service is not reachable from untrusted networks.
- Check vendor advisories before performing intrusive validation.
- Review edge firewall rules for router management-plane exposure.
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-121: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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-2025-60691 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
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:N/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:N/UI:N/S:U/C:H/I:H/A:H2.85.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:A/AC:L/PR:N/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://www.linksys.com/CVE reference, mitre
- https://github.com/yifan20020708/SGTaint-0-day/blob/main/Linksys/Linksys-E1200/CVE-2025-60691.mdCVE 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.
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.