Trending
CVE-2025-27840

CVE detail

CVE-2025-27840

Espressif ESP32 chips allow 29 hidden HCI commands, such as 0xFC02 (Write memory).

CVSS 6.8 · MediumBuzz score 48.3

Buzz score

Why this CVE is surfacing

Buzz score total 48.3

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 28.3 · diversity 20.0 · KEV 0.0 · OTX 0.0 · PoC 0.0

Mention score

28.3

16 evidence mentions in the snapshot

Diversity score

20.0

11 sources across 4 categories

KEV score

0.0

No KEV entry observed

OTX score

0.0

0 OTX pulses

PoC score

0.0

0 repos · best confidence N/A

Best PoC traction

Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions: 0; within the 30d window
Peak daily: 0; highest bucket

Evidence

Source links by recency

Newest mentions first

16 source links · newest first

17th March – Threat Intelligence ReportCheck Point Research
For the latest discoveries in cyber research for the week of 17th March, please download our Threat Intelligence Bulletin. TOP ATTACKS AND BREACHES Check Point Research elaborates about the pro-Palestinian hacktivist group “Dark Storm” which claimed the large-scale DDoS attack against X (formerly Twitter). The attack disrupted access to the platform, causing outages for users […]
vendorresearch.checkpoint.comMar 17, 2025, 2:38 PM
https://x.com/pascal_gujer/status/1898442439704158276x.com
No excerpt available.
Exploitx.comMar 8, 2025, 8:15 PM
https://www.tarlogic.com/news/backdoor-esp32-chip-infect-ot-devices/www.tarlogic.com
No excerpt available.
Third Party Advisorywww.tarlogic.comMar 8, 2025, 8:15 PM
https://www.espressif.com/en/news/Response_ESP32_Bluetoothwww.espressif.com
No excerpt available.
Press/Media Coveragewww.espressif.comMar 8, 2025, 8:15 PM
https://www.bleepingcomputer.com/news/security/undocumented-commands-found-in-bluetooth-chip-used-by-a-billion-devices/www.bleepingcomputer.com
No excerpt available.
Exploitwww.bleepingcomputer.comMar 8, 2025, 8:15 PM
https://www.bleepingcomputer.com/news/security/undocumented-backdoor-found-in-bluetooth-chip-used-by-a-billion-devices/www.bleepingcomputer.com
No excerpt available.
Exploitwww.bleepingcomputer.comMar 8, 2025, 8:15 PM
https://reg.rootedcon.com/cfp/schedule/talk/5reg.rootedcon.com
No excerpt available.
Third Party Advisoryreg.rootedcon.comMar 8, 2025, 8:15 PM
https://news.ycombinator.com/item?id=43308740news.ycombinator.com
No excerpt available.
Exploitnews.ycombinator.comMar 8, 2025, 8:15 PM
https://news.ycombinator.com/item?id=43301369news.ycombinator.com
No excerpt available.
Exploitnews.ycombinator.comMar 8, 2025, 8:15 PM
https://github.com/orgs/espruino/discussions/7699github.com
No excerpt available.
Exploitgithub.comMar 8, 2025, 8:15 PM
https://github.com/esphome/esphome/discussions/8382github.com
No excerpt available.
Exploitgithub.comMar 8, 2025, 8:15 PM
https://github.com/em0gi/CVE-2025-27840github.com
No excerpt available.
Exploitgithub.comMar 8, 2025, 8:15 PM
https://github.com/TarlogicSecurity/Talks/blob/main/2025_RootedCon_BluetoothTools.pdfgithub.com
No excerpt available.
Exploitgithub.comMar 8, 2025, 8:15 PM
https://flyingpenguin.com/?p=67838flyingpenguin.com
No excerpt available.
Third Party Advisoryflyingpenguin.comMar 8, 2025, 8:15 PM
https://darkmentor.com/blog/esp32_non-backdoor/darkmentor.com
No excerpt available.
Exploitdarkmentor.comMar 8, 2025, 8:15 PM
https://cheriot.org/auditing/backdoor/2025/03/09/no-esp32-style-backdoor.htmlcheriot.org
No excerpt available.
Third Party Advisorycheriot.orgMar 8, 2025, 8:15 PM

Exploit code

Public exploit repository references

Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.

0 repository references · best confidence N/A · max 0 stars

No public PoC repositories have been matched yet.

Related records

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External lookup

Potential internet exposure

Potential exposure only — not proof of vulnerability.Shodan results indicate potentially internet-exposed products, not confirmed vulnerable systems. They do not confirm that any returned system is vulnerable to CVE-2025-27840.

Product-level CPE searches intentionally omit version fields and NVD version-range or configuration certainty. Verify the exact product version and configuration independently.

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Product CPE queries

Derived from this CVE's existing NVD CPE 2.3 records; the application, operating-system, or hardware part is retained.

cpe:2.3:h:espressif:esp32Search this product on Shodan
cpe:2.3:o:espressif:esp32_firmwareSearch this product on Shodan

Exact CVE query

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vuln:CVE-2025-27840Search this CVE on Shodan

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Metadata

Canonical fields

NVD status

Analyzed

Published

Mar 8, 2025

Modified

Jun 17, 2026

Official record

Authoritative NVD record

CVSS vector

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

CWE IDs

Vendor classifications

How this vector reads

CVSS 3.1 base metrics decoded below. This explanation does not recalculate or change the NVD score.

Attack Vector (AV): Physical. The attacker needs physical access to the vulnerable system.
Attack Complexity (AC): High. Successful exploitation depends on conditions outside the attacker's control.
Privileges Required (PR): High. The attacker needs significant administrative privileges.
User Interaction (UI): None. Exploitation does not require another user to act.
Scope (S): Changed. Impacts can cross into a different security authority.
Confidentiality Impact (C): High. There is a total or serious impact to this security property.
Integrity Impact (I): High. There is a total or serious impact to this security property.
Availability Impact (A): Low. There is a limited impact to this security property.

Signals

Exploitation indicators

0 stored signals · no KEV · 0 OTX pulses