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CVE-2020-8476

25
FAUCET Score

CVE-2020-8476 describes a weakness in input validation within 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 this by sending specially crafted messages to the CLS web service, enabling them to alter licenses assigned to system nodes. This vulnerability carries a CVSS v3.1 score of 7.5 (High), indicating a network-exploitable flaw with low attack complexity and high impact on integrity, but no impact on confidentiality or availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage 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
1.51%
Probability of exploitation in next 30 days
EPSS Percentile
71.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0151 is in the 53rd 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