How severe is CVE-2021-34577?

CVE-2021-34577 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-34577 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-34577?

CVE-2021-34577 affects Kadenvodomery Picoflux Air Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-34577?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-34577 published?

CVE-2021-34577 was published on 2022-11-09 and last updated on 2026-06-17.

CVE-2021-34577

CVE-2021-34577 is a medium-severity vulnerability in Kadenvodomery Picoflux Air Firmware with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-798.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-798
Affected product: Kadenvodomery Picoflux Air Firmware
Published: 2022-11-09
Last modified: 2026-06-17

Description

In the Kaden PICOFLUX AiR water meter an adversary can read the values through wireless M-Bus mode 5 with a hardcoded shared key while being adjacent to the device.

Frequently asked questions

What is CVE-2021-34577?: In the Kaden PICOFLUX AiR water meter an adversary can read the values through wireless M-Bus mode 5 with a hardcoded shared key while being adjacent to the device.
How severe is CVE-2021-34577?: CVE-2021-34577 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-34577 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-34577?: CVE-2021-34577 affects Kadenvodomery Picoflux Air Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-34577?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-34577 published?: CVE-2021-34577 was published on 2022-11-09 and last updated on 2026-06-17.

References

https://www.fit.vutbr.cz/~polcak/CVE-2021-34577

Affected products (1)

cpe:2.3:o:kadenvodomery:picoflux_air_firmware:-:*:*:*:*:*:*:*

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