CVE-2022-43294: Tasmota before commit 066878da4d4762a9b6cb169fdf353e804d735cfd was discovered to contain a stack overflow via

Q: How do I fix CVE-2022-43294?

tasmota: upgrade to 12.2.0. Exact commands for each OS are on this page.

Q: Is CVE-2022-43294 being exploited?

CVE-2022-43294 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2022-43294 affect?

CVE-2022-43294 affects tasmota. Severity is critical (CVSS 9.8). Tasmota before commit 066878da4d4762a9b6cb169fdf353e804d735cfd was discovered to contain a stack overflow via the ClientPortPtr parameter at lib/libesp32/rtsp/CRtspSession.cpp.

Q: How urgent is CVE-2022-43294?

Priority 55/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2022-43294 is a critical-severity flaw (CVSS 9.8) affecting tasmota. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Tasmota before commit 066878da4d4762a9b6cb169fdf353e804d735cfd was discovered to contain a stack overflow via the ClientPortPtr parameter at lib/libesp32/rtsp/CRtspSession.cpp.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-787
Published	2022-11-14
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: tasmota project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-11-14 22:15 UTCPublished CVE record published
2026-06-17 05:06 UTCUpdated Record last modified

tasmota project tasmota UPGRADE

Affected: < 12.2.0

Fixed in: 12.2.0

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-43294?

tasmota: upgrade to 12.2.0. Exact commands for each OS are on this page.

Is CVE-2022-43294 being exploited?

CVE-2022-43294 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-43294 affect?

CVE-2022-43294 affects tasmota. Severity is critical (CVSS 9.8). Tasmota before commit 066878da4d4762a9b6cb169fdf353e804d735cfd was discovered to contain a stack overflow via the ClientPortPtr parameter at lib/libesp32/rtsp/CRtspSession.cpp.

How urgent is CVE-2022-43294?

Priority 55/100. Critical severity; Remotely exploitable, no login, no user action

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References

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