CVE-2022-29496: A stack-based buffer overflow vulnerability exists in the BlynkConsole.h runCommand functionality of Blynk -Li

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2022-29496 is a critical-severity flaw (CVSS 9.8) affecting blynk-library. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A stack-based buffer overflow vulnerability exists in the BlynkConsole.h runCommand functionality of Blynk -Library v1.0.1. A specially-crafted network request can lead to command execution. An attacker can send a network request to trigger this vulnerability.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.0% (top 19%)
CISA exploited list	No
Weakness	CWE-121, CWE-787
Published	2022-06-17
Last modified	2026-06-17

Publisher (CNA): Talos · Vendor: blynk

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

Am I affected?

Timeline

2022-06-17 18:15 UTCPublished CVE record published
2026-06-17 04:40 UTCUpdated Record last modified

blynk blynk-library DOWNGRADE

Affected: 1.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.1

1. Check installed version

apt-cache policy blynk-library || rpm -q blynk-library || blynk-library --version

2. No fixed release: DOWNGRADE to a release before 1.0.1 (Debian / Ubuntu)

apt-cache madison blynk-library sudo apt install blynk-library=<VERSION_BEFORE_1.0.1> sudo apt-mark hold blynk-library

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list blynk-library sudo dnf downgrade blynk-library-<VERSION_BEFORE_1.0.1> sudo dnf versionlock add blynk-library

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2022-29496?

blynk-library: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-29496 being exploited?

CVE-2022-29496 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-2022-29496 affect?

CVE-2022-29496 affects blynk-library. Severity is critical (CVSS 9.8). A stack-based buffer overflow vulnerability exists in the BlynkConsole.h runCommand functionality of Blynk -Library v1.0.1. A specially-crafted network request can lead to command execution. An attacker can send a network request to trigger

How urgent is CVE-2022-29496?

Priority 65/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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