free@home System Access Point FW integrity check can be bypassed.

published 2021-09-23 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-9422

cvss: 6.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 17%
public exploits: 0; none known

The vulnerability allows a successful attacker to bypass the integrity check of FW uploaded to the free@home System Access Point.

Patch / fix

fixed in 5

abb system_access_point_2.0_firmware 2.6.4
abb system_access_point_127v_firmware 2.6.4
abb wl-system_access_point_127v_firmware 2.6.4
abb wl-system_access_point_firmware 2.6.4
abb wl-system_access_point_2.0_firmware 2.6.4

Exploit prediction

0.26% chance of exploitation in the next 30 days, higher than 17% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.1	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
NVD	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

ABB System Access Point
Busch-Jaeger System Access Point

Classification

Weakness

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-354 Improper Validation of Integrity Check Value

References

search.abb.com /library/Download.aspx?DocumentID=9AKK107992A6475&LanguageCode=en&DocumentPartId=&Action=Launch
vendor-advisory

Sources

CVE List CVE-2021-22276
NVD CVE-2021-22276

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary