TOTOLINK A950RG 4.1.2cu.5268_B20221104 MAC Filter /cgi-bin/cstecgi.cgi setMacFilterRules addEffect stack-based overflow

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
9.0$0-$5k1.87-

Summaryinfo

A vulnerability described as very critical has been identified in TOTOLINK A950RG 4.1.2cu.5268_B20221104. Affected by this issue is the function setMacFilterRules of the file /cgi-bin/cstecgi.cgi of the component MAC Filter Handler. Such manipulation of the argument addEffect leads to stack-based overflow. This vulnerability is uniquely identified as CVE-2026-121600. The attack can be launched remotely. Moreover, an exploit is present.

Detailsinfo

A vulnerability was found in TOTOLINK A950RG 4.1.2cu.5268_B20221104. It has been rated as very critical. Affected by this issue is the function setMacFilterRules of the file /cgi-bin/cstecgi.cgi of the component MAC Filter Handler. The manipulation of the argument addEffect with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is confidentiality, integrity, and availability.

The advisory is available at gist.github.com. This vulnerability is handled as CVE-2026-121600. The exploitation is known to be easy. The attack may be launched remotely. Technical details as well as a public exploit are known. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 11/03/2026).

The exploit is available at gist.github.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.0

VulDB Base Score: 9.9
VulDB Temp Score: 9.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

11/03/2026 Advisory disclosed
11/03/2026 +0 days VulDB entry created
11/03/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: totolink.net

Advisory: gist.github.com
Status: Not defined

CNA: VulDB
CVE: CVE-2026-121600 (🔒)

GCVE (CVE): GCVE-0-2026-121600
GCVE (VulDB): GCVE-100-430442
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 11/03/2026 17:19
Changes: 11/03/2026 17:19 (57)
Complete: 🔍
Submitter: LiuYijun_JX.SGCC
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #1022562: TOTOLINK A950RG V4.1.2cu.5268_B20221104 Stack Buffer Overflow (by LiuYijun_JX.SGCC)

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to know what is going to be exploited?

We predict KEV entries!