Security readout for executives and security teams
Plain-English summary
Comfast CF-N1-S firmware 2.6.0.1 contains a remotely reachable memory-corruption flaw in its web-management interface. An attacker with low-level access could trigger a stack buffer overflow, potentially causing severe confidentiality, integrity, and availability impacts. Public exploit material increases urgency, but the supplied sources do not establish active exploitation.
Executive priority
Treat affected, reachable devices as an immediate remediation priority. Isolate their management interfaces now and seek vendor guidance. Replacement should be considered if no supported fix is available, especially for internet-exposed or business-critical deployments.
Technical view
The flaw affects sub_44B50C in /cgi-bin/mbox-config when setting the ptest_channel section. Crafted input can cause a stack-based buffer overflow (CWE-119/CWE-121). CVSS 3.1 rates it 9.9: network-accessible, low complexity, low privileges, no user interaction, changed scope, and high confidentiality, integrity, and availability impacts.
Likely exposure
Exposure is limited to Comfast CF-N1-S devices running version 2.6.0.1. Risk is greatest where the web-management interface is reachable from untrusted networks or accessible using low-privilege accounts. The supplied evidence does not identify other affected versions or products.
Exploitation context
A public exploit is referenced, meaning technical details may be available to attackers. The CVSS vector indicates low privileges are required. This CVE is not identified as being in CISA KEV, and the supplied sources provide no evidence of active exploitation in the wild.
Researcher notes
The record identifies the vulnerable function and endpoint but does not establish exact input boundaries, reliable code execution, observed attacks, or an official patch. Public exploit availability is reported; avoid equating this with confirmed exploitation. Validate exposure non-destructively because overflow testing could disrupt the device.
Mitigation direction
- Identify CF-N1-S devices and confirm their installed firmware versions.
- Restrict web-management access to trusted administrative networks and authorized users.
- Remove direct internet exposure using network controls where operationally feasible.
- Review low-privilege accounts and rotate credentials if compromise is suspected.
- Check Comfast guidance for an official fixed firmware or vendor-approved mitigation.
Validation and detection
- Inventory devices matching the CF-N1-S model and firmware 2.6.0.1.
- Verify the management interface is inaccessible from untrusted networks.
- Review access logs for unusual requests targeting /cgi-bin/mbox-config.
- Check device logs for crashes, restarts, or unexplained configuration changes.
- Confirm any vendor-provided update is installed and persists after reboot.
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-119: 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 lookupCWE-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 lookupCVE-2026-77148 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
- Critical
- CVSS
- 9.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
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
4 official scoresWe 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:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R3.16VulDBCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R3.16VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P——VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR810VulDBVulnerability scoring details
Base CVSS 4.0 score
9.4CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
Base CVSS 3.1 score
9.9CriticalVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
Base CVSS 3.0 score
9.9CriticalVector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
Base CVSS 2.0 score
9CriticalVector: AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- Source timelineVulDB
Advisory disclosed
- Source timelineVulDB
VulDB entry created
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- Source timelineVulDB
VulDB entry last update
- 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
- VDB-393733 | Comfast CF-N1-S Web Management mbox-config sub_44B50C stack-based overflowCVE reference, VulDB · vdb-entry, technical-description
- VDB-393733 | CTI Indicators (IOB, IOC, IOA)CVE reference, VulDB · signature, permissions-required
- CVE-2026-77148 | CVE Analysis and ReportCVE reference, VulDB · third-party-advisory
- Submit #880910 | Comfast CF-N1-S V2.6.0.1 Buffer OverflowCVE reference, VulDB · third-party-advisory
- https://github.com/AdminSafe/CVE/issues/7CVE reference, VulDB · exploit, issue-tracking
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.
Improper Restriction of Operations within the Bounds of a Memory Buffer
Improper Restriction of Operations within the Bounds of a Memory Buffer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
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.