Nissan Sylphy Classic 2021 Remote keyfob System authentication replay

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability has been found in Nissan Sylphy Classic 2021 and classified as critical. Affected by this vulnerability is an unknown function of the component Remote keyfob System. The manipulation with an unknown input leads to a authentication replay vulnerability. The CWE definition for the vulnerability is CWE-294. A capture-replay flaw exists when the design of the software makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The remote keyfob system on Nissan Sylphy Classic 2021 sends the same RF signal for each door-open request, which allows for a replay attack.

The weakness was released 05/22/2023. The advisory is shared at This vulnerability is known as CVE-2023-33281 since 05/22/2023. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/22/2023). MITRE ATT&CK project uses the attack technique T1040 for this issue.

We expect the 0-day to have been worth approximately $5k-$25k.

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




CPE 2.3info

CPE 2.2info



VulDB Meta Base Score: 3.9
VulDB Meta Temp Score: 3.9

VulDB Base Score: 3.9
VulDB Temp Score: 3.9
VulDB Vector: 🔒
VulDB Reliability: 🔍



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


Class: Authentication replay
CWE: CWE-294 / CWE-287
ATT&CK: T1040

Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒


Threat Intelligenceinfo

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


Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒


05/22/2023 Advisory disclosed
05/22/2023 +0 days CVE reserved
05/22/2023 +0 days VulDB entry created
05/22/2023 +0 days VulDB last update


Status: Not defined

CVE: CVE-2023-33281 (🔒)


Created: 05/22/2023 07:05 AM
Changes: 05/22/2023 07:05 AM (39)
Complete: 🔍


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