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CVE-2023-33383

30
FAUCET Score

CVE-2023-33383 affects the Shelly 4PM Pro four-channel smart switch firmware version 0.11.0, allowing an attacker to cause a device reload through a Bluetooth Low Energy (BLE) out-of-bounds read fault. This vulnerability has a CVSS score of 5.3 (Medium), indicating a low-complexity attack that can be executed remotely without authentication, leading to a denial of service. While not actively exploited in the wild (KEV: No), an authentication bypass exploit (EDB-51657) has been published, and there is community discussion surrounding the vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
0.11.0CPE matchmatch criteria
cpe:2.3:o:shelly:pro_4pm_firmware:0.11.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.46%
Probability of exploitation in next 30 days
EPSS Percentile
82.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-51657 · Aug 4, 2023
This CVE's current EPSS score of 0.0246 is in the 74th percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

packetstormsecurity.com / files/173954/Shelly-PRO-4PM-0.11.0-Authentication-Bypass.html
ExploitThird Party AdvisoryVDB Entry
exploitsecurity.io / post/cve-2023-33383-authentication-bypass-via-an-out-of-bounds-read-vulnerability
ExploitThird Party Advisory