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CVE Record

CVE-2026-77022: Comfast CF-N1-S SSID Configuration mbox-config sub_44B438 stack-based overflow

A security flaw has been discovered in Comfast CF-N1-S 2.6.0.1. Affected by this issue is the function sub_44B438 of the file /cgi-bin/mbox-config?method=SET&section=ptest_ssid of the component SSID Configuration. The manipulation of the argument ssid results in stack-based buffer overflow. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks.

CriticalCVSS 9.9Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

Comfast CF-N1-S devices running firmware 2.6.0.1 contain a remotely reachable memory-corruption flaw in SSID configuration. An authenticated attacker with low-level privileges could potentially compromise the device, alter data, or disrupt service. Public exploit material reportedly exists, increasing urgency, but the supplied sources do not establish active exploitation.

Executive priority

Treat confirmed CF-N1-S 2.6.0.1 deployments as an immediate remediation priority, especially when remotely managed or broadly accessible. Public exploit availability materially raises risk, although active attacks are unconfirmed. Require rapid inventory, access restriction, vendor-guidance review, and enhanced monitoring.

Technical view

The SSID Configuration handler at /cgi-bin/mbox-config processes the ssid argument using function sub_44B438. Crafted input can cause a stack-based buffer overflow. CVSS 3.1 scores it 9.9 because exploitation is network-based, low complexity, requires low privileges, needs no user interaction, and may affect confidentiality, integrity, and availability beyond the vulnerable component.

Likely exposure

Exposure is limited by the supplied evidence to Comfast CF-N1-S firmware 2.6.0.1. Risk is highest where the device management interface is reachable from untrusted networks or accessible to low-privileged accounts. The bundle does not identify other affected firmware versions or confirm default internet exposure.

Exploitation context

A public exploit is reportedly available, making attempted exploitation more plausible. However, CVE-2026-77022 is not listed as a KEV in the supplied bundle, and no cited evidence confirms active exploitation. Successful exploitation reportedly requires low privileges and access to the vulnerable configuration endpoint.

Researcher notes

The affected handler, argument, firmware, and overflow class are specifically identified, but the bundle provides no vendor advisory, patched version, confirmed code-execution outcome, or observed attack evidence. Avoid assuming adjacent firmware is vulnerable or fixed. Public exploit availability is reported by VulDB and linked issue material; it does not prove exploitation in the wild.

Mitigation direction

  • Identify and prioritize CF-N1-S devices running firmware 2.6.0.1.
  • Check Comfast guidance for an approved firmware update or remediation.
  • Restrict management-interface access to trusted administrative networks and accounts.
  • Disable external management access where operationally feasible.
  • Monitor affected devices closely until vendor remediation is confirmed.

Validation and detection

  • Confirm each device model and installed firmware version through trusted inventory records.
  • Determine whether the management interface is reachable from untrusted networks.
  • Review accounts and permissions capable of changing SSID configuration.
  • Inspect logs and monitoring for unexpected configuration changes, crashes, or restarts.
  • Verify vendor remediation status before treating an update as sufficient.
Prepared
Confidence
medium
Sources
5

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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 · low confidence lookup

CWE-119: Exact CWE lookup

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cwe · low confidence lookup

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.

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cve · low confidence lookup

CVE-2026-77022 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
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

Official CVE source material

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.

4CVSS vectors
6Timeline events
1ADP providers
6Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: pocAutomatable: noTechnical Impact: total

CVSS vector scores

4 official scores

We 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.

ScoreVersionSeverityVectorExploitImpactSource
9.9CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R3.16VulDB
9.9CVSS 3.0CriticalCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R3.16VulDB
9.4CVSS 4.0CriticalCVSS: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——VulDB
9CVSS 2.0CriticalAV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR810VulDB

Vulnerability scoring details

Base CVSS 4.0 score

9.4Critical
CVSS 4.0 vector shape for CVE-2026-77022Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: 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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Attack Requirements
NonePresent
Privileges Required
NoneLowHigh
User Interaction
NonePassiveActive
VS Confidentiality
HighLowNone
VS Integrity
HighLowNone
VS Availability
HighLowNone
SS Confidentiality
HighLowNone
SS Integrity
HighLowNone
SS Availability
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. Source timelineVulDB

    Advisory disclosed

  2. Source timelineVulDB

    VulDB entry created

  3. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  4. Source timelineVulDB

    VulDB entry last update

  5. CVE publishedCVE Program

    The CVE record was published.

  6. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
ComfastCF-N1-S2.6.0.1Listed
Weakness

CWE details

CWE-119CWE-121

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.