CVE-2022-43294Network attack vector

Stack memory overwrite via unbounded client port copy

Published Nov 14, 2022 · Updated Apr 30, 2025

Stack overflow in Tasmota before 12.2.0 allows remote attackers to overwrite stack memory through a crafted RTSP client_port value. ParseRtspRequest copies ClientPortPtr into the 128-byte CP stack buffer with unbounded strcpy, so an oversized value writes past the buffer. An unauthenticated network path to the RTSP service is required; published evidence does not establish whether the overwrite yields code execution or only a crash.

CVSS severity9.8
Critical
EPSS probability0.95%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack overflow in Tasmota before 12.2.0 allows remote attackers to overwrite stack memory through a crafted RTSP client_port value. ParseRtspRequest copies ClientPortPtr into the 128-byte CP stack buffer with unbounded strcpy, so an oversized value writes past the buffer. An unauthenticated network path to the RTSP service is required; published evidence does not establish whether the overwrite yields code execution or only a crash.

The record

CVE
CVE-2022-43294
Published
Nov 14, 2022
Updated
Apr 30, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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