FreeRDP 2.0.0-beta1/3.27.x Smartcard ATR smartcard_LocateCardsByATRA_Call cbAtr out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00-

Summaryinfo

A vulnerability, which was classified as problematic, was found in FreeRDP 2.0.0-beta1/3.27.x. Affected is the function smartcard_LocateCardsByATRA_Call of the component Smartcard ATR Handler. The manipulation of the argument cbAtr results in out-of-bounds. This vulnerability is identified as CVE-2026-109677. The attack can be executed remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in FreeRDP 2.0.0-beta1/3.27.x. Affected is the function smartcard_LocateCardsByATRA_Call of the component Smartcard ATR Handler. The manipulation of the argument cbAtr with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality. CVE summarizes:

FreeRDP from 2.0.0-beta1 before 3.28.0 contains an out-of-bounds read vulnerability in smartcard_LocateCardsByATRA_Call because the ATR pattern cbAtr byte count is not capped. Malicious RDP servers can send crafted ATR mask arrays to use query timing as an oracle, leaking heap memory bit-by-bit to defeat ASLR and aid RCE exploits.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-109677 since 10/12/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

Upgrading to version 3.28.0 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: FreeRDP 3.28.0

Timelineinfo

10/12/2026 CVE reserved
10/13/2026 +1 days Advisory disclosed
10/13/2026 +0 days VulDB entry created
10/13/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-109677 (🔒)
GCVE (CVE): GCVE-0-2026-109677
GCVE (VulDB): GCVE-100-417636

Entryinfo

Created: 10/13/2026 15:48
Changes: 10/13/2026 15:48 (78)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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