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CVE-2020-8475

23
FAUCET Score

CVE-2020-8475 is a denial-of-service vulnerability affecting the Central Licensing Server (CLS) component across numerous ABB products, including ABB Ability System 800xA, Compact HMI, and Symphony Plus. An unauthenticated attacker can exploit a weakness in input validation by sending specially crafted messages to the CLS web service, leading to a disruption of license handling. With a CVSS score of 7.5 (HIGH), this vulnerability has a network attack vector, low attack complexity, and high impact on availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
5.1CPE matchmatch criteria
cpe:2.3:a:abb:800xa_system:5.1:-:*:*:*:*:*:*
5.1CPE matchmatch criteria
cpe:2.3:a:abb:800xa_system:5.1:feature_pack_4:*:*:*:*:*:*
5.1CPE matchmatch criteria
cpe:2.3:a:abb:800xa_system:5.1:feature_pack_4_revision_d:*:*:*:*:*:*
5.1CPE matchmatch criteria
cpe:2.3:a:abb:800xa_system:5.1:revision_a:*:*:*:*:*:*
5.1CPE matchmatch criteria
cpe:2.3:a:abb:800xa_system:5.1:revision_b:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.13%
Probability of exploitation in next 30 days
EPSS Percentile
62.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0112 is in the 41st percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

search.abb.com / library/Download.aspx
Vendor Advisory
search.abb.com / library/Download.aspx
Vendor Advisory
search.abb.com / library/Download.aspx