davenardella snap7 up to 1.4.3 s7_micro_client.cpp opUpload DataLen memory corruption

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.
6.0$0-$5k2.95

Summaryinfo

A vulnerability classified as problematic has been found in davenardella snap7 up to 1.4.3. The impacted element is the function TSnap7MicroClient::opUpload of the file src/core/s7_micro_client.cpp. The manipulation of the argument DataLen leads to memory corruption. This vulnerability is uniquely identified as CVE-2026-90572. The attack is possible to be carried out remotely. Moreover, an exploit is present. The project was informed of the problem early through an issue report but has not responded yet.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in davenardella snap7 up to 1.4.3. This issue affects the function TSnap7MicroClient::opUpload of the file src/core/s7_micro_client.cpp. The manipulation of the argument DataLen with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability.

The weakness was disclosed 08/01/2026 by Mayur Agnihotri (Mayur021) as 30. The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-90572. The exploitation is known to be easy. The attack may be initiated remotely. Additional levels of successful authentication are required for exploitation. Technical details as well as a public exploit are known.

The exploit is available at github.com. It is declared as proof-of-concept. The project was informed of the problem early through an issue report but has not responded yet.

Addressing this vulnerability is possible by firewalling 102.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.0

VulDB Base Score: 4.7
VulDB Temp Score: 4.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

Researcher Base Score: 8.2
Researcher Vector: 🔒

CVSSv2info

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

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

Exploitinginfo

Class: Memory corruption
CWE: 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: 🔒

Firewalling: 🔒

Timelineinfo

08/01/2026 Vendor informed
08/01/2026 +0 days Advisory disclosed
09/12/2026 +42 days VulDB entry created
09/12/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 30
Researcher: Mayur Agnihotri (Mayur021)
Status: Not defined

CVE: CVE-2026-90572 (🔒)
GCVE (CVE): GCVE-0-2026-90572
GCVE (VulDB): GCVE-100-403157
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/12/2026 18:16
Updated: 09/12/2026 18:59
Changes: 09/12/2026 18:16 (58), 09/12/2026 18:55 (8), 09/12/2026 18:56 (8), 09/12/2026 18:59 (3)
Complete: 🔍
Submitter: mayur021
Committer: mayur021
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #912711: davenardella snap7 1.4.3 Memory Corruption (by mayur021)

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Might our Artificial Intelligence support you?

Check our Alexa App!