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CVE-2024-1002· NVD / CVE Program· CNA VulDB

Totolink N200RE cstecgi.cgi setIpPortFilterRules stack-based overflow

A vulnerability classified as critical was found in Totolink N200RE 9.3.5u.6139_B20201216. Affected by this vulnerability is the function setIpPortFilterRules of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument ePort leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-252271. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

HighCVSS 8.8 · v3.1—No exploit No fix recorded
Published
Jan 29, 2024
Updated
Jun 17, 2026
EPSS
1.3% · 68th percentile
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Action score

35

Monitor

Low priority for now.

CVSS
35 / 40 · 8.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.3%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
8.8
CNA · VulDB
7.2
1.6 point gap

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Affected systems

VendorProduct
totolinkn200re firmware
totolinkn200re

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • totolink n200re firmware9.3.5u.6139_b20201216

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulDB). Independent of NVD's CPE analysis and usually ahead of it.

  • Totolink N200RE

    • 9.3.5u.6139_B20201216affected

Same product

totolink: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-0299Totolink N200RE cstecgi.cgi setTracerouteCfg os command injection
    40Plan
  • CVE-2024-0298Totolink N200RE cstecgi.cgi setDiagnosisCfg os command injection
    40Plan
  • CVE-2024-0297Totolink N200RE cstecgi.cgi UploadFirmwareFile os command injection
    40Plan
  • CVE-2024-0296Totolink N200RE cstecgi.cgi NTPSyncWithHost os command injection
    40Plan
  • CVE-2024-1001Totolink N200RE cstecgi.cgi main stack-based overflow
    39Monitor
  • CVE-2024-1003Totolink N200RE cstecgi.cgi setLanguageCfg stack-based overflow
    35Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2024-10010 days apartTotolink N200RE cstecgi.cgi main stack-based overflow
    39Monitor
  • CVE-2024-09970 days apartTotolink N200RE cstecgi.cgi setOpModeCfg stack-based overflow
    35Monitor
  • CVE-2024-09980 days apartTotolink N200RE cstecgi.cgi setDiagnosisCfg stack-based overflow
    35Monitor
  • CVE-2024-09990 days apartTotolink N200RE cstecgi.cgi setParentalRules stack-based overflow
    35Monitor
  • CVE-2024-10000 days apartTotolink N200RE cstecgi.cgi setTracerouteCfg stack-based overflow
    35Monitor
  • CVE-2024-10030 days apartTotolink N200RE cstecgi.cgi setLanguageCfg stack-based overflow
    35Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-121 · Stack-based Buffer Overflow

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records