Evidence used
- No CISA KEV confirmation is currently recorded.
- EPSS is 0.27% for the current model date.
BlackTreeCVE IntelligenceFull vulnerability report · 2026
CVE-2025-4676High confidence
Authentication bypass by brute forcing Authentication Headers
ABB · WebPro SNMP Card PowerValue
8.4HighCVSS 4.0
Within 7 days
Patch availableHigh technical severity; prioritise exposed affected systems while verifying vendor guidance.
R
Open reassessment dashboard →Operational reassessment
Published severity in operational context
Published severityHigh→Operational priority:High, unchanged from published severity.unchanged
Compensating controls
- Validate the affected product branch and deploy the verified fixed release.
- Restrict local access and enforce least privilege on affected hosts.
- Monitor vendor guidance and exploitation sources for a material change.
Verification
- Confirm that the asset runs ABB WebPro SNMP Card PowerValue and falls inside the recorded affected range.
- Verify the installed build against the product-specific fixed version after deployment.
- Validate exposure, authentication requirements and compensating controls in the actual environment.
- Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Direct vendor intelligence
1 currentAuthoritative vendor CSAF and VEX advisories
Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.
2CRT000009 · CSAF 2.0 · revision 1 · finalABB Product Security Incident Response Team (PSIRT)CVE-2025-4676
The vendor explicitly identifies these products as affected by this CVE.
- ABB WebPro SNMP Card PowerValue <=1.1.8.k
- ABB WebPro SNMP Card PowerValue UL <=1.1.8.k
- Summary
- Device web HMI authenticates user by validating the first character of the session cookie and authentication token. So, if only the first characters of the session cookie and token are correct, a user will be validated. An attacker can easily brute force the first character of both session cookie and bearer token. This vulnerability allows an attacker to easily bypass the authentication implemented on the device.
- Remediation
- The problem is corrected in the following product versions: WebPro SNMP card PowerValue version 1.1.8.p ABB advises users of the affected product versions to reach out to ABB Digital Service Support (ch.ups.digital@abb.com) for guidance and recommended actions. Additionally, ABB recommends implementing defensive measures to reduce the risk of vulnerability exploitation, as outlined in the product instruction manual. Please refer to the section “Mitigation factors” for more information.
High technical severity; prioritise exposed affected systems while verifying vendor guidance.
Patch available01
What, why and how
Incorrect Implementation of Authentication Algorithm vulnerability in ABB WebPro SNMP Card PowerValue, ABB WebPro SNMP Card PowerValue UL.This issue affects WebPro SNMP Card PowerValue: through 1.1.8.K; WebPro SNMP Card PowerValue UL: through 1.1.8.K.
What
Incorrect Implementation of Authentication Algorithm vulnerability in ABB WebPro SNMP Card PowerValue, ABB WebPro SNMP Card PowerValue UL.This issue affects WebPro SNMP Card PowerValue: through 1.1.8.K; WebPro SNMP Card PowerValue UL: through 1.1.8.K.
Why
The requirements for the product dictate the use of an established authentication algorithm, but the implementation of the algorithm is incorrect.
How
An attacker operating through an adjacent network may attempt exploitation when the stated preconditions are met. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
What
Incorrect Implementation of Authentication Algorithm vulnerability in ABB WebPro SNMP Card PowerValue, ABB WebPro SNMP Card PowerValue UL.This issue affects WebPro SNMP Card PowerValue: through 1.1.8.K; WebPro SNMP Card PowerValue UL: through 1.1.8.K.
Why
The requirements for the product dictate the use of an established authentication algorithm, but the implementation of the algorithm is incorrect.
How
An attacker operating through an adjacent network may attempt exploitation when the stated preconditions are met. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
02
Exploit reality and attack path
CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.
Observed exploitation No confirmed evidence
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.
Public PoC / exploit material None recorded
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.
- Likely attack path
- an adjacent network → Incorrect Implementation of Authentication Algorithm → cause the confidentiality, integrity or availability impact described by the vendor
- Attack surface
- Adjacent
- Privileges required
- None: unauthenticated exploitation is possible
- User interaction
- Active interaction required
- Attack complexity
- Low: no specialised conditions are recorded
- Security boundary
- Not a CVSS 4.0 base metric
- Weakness
?
CWE means Common Weakness Enumeration: a standard category for the underlying weakness. - CWE-303 ↗
CWE-303: Incorrect Implementation of Authentication Algorithm. The requirements for the product dictate the use of an established authentication algorithm, but the implementation of the algorithm is incorrect.
- CVSS vector
?
CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity. CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:H/SI:H/SA:HCommon Vulnerability Scoring System 4.0: the compact vector below is decoded into plain language.
AVAdjacentAttack vector: The attacker must be on an adjacent or logically close network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.ATNoneAttack requirements: No additional deployment or execution condition is required.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIActiveUser interaction: A user must take a deliberate action for exploitation to succeed.VCNoneVulnerable-system confidentiality: No direct loss is represented by this metric.VINoneVulnerable-system integrity: No direct loss is represented by this metric.VAHighVulnerable-system availability: A successful attack can cause a major loss.SCHighSubsequent-system confidentiality: A successful attack can cause a major loss.SIHighSubsequent-system integrity: A successful attack can cause a major loss.SAHighSubsequent-system availability: A successful attack can cause a major loss.- Post-exploitation / living off the land
- No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
03
Patch and workaround
Operational remediation based on structured source evidence.
- Status
?
Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change. - Patch available
- Action
- The problem is corrected in the following product versions: WebPro SNMP card PowerValue version 1.1.8.p ABB advises users of the affected product versions to reach out to ABB Digital Service Support (ch.ups.digital@abb.com) for guidance and recommended actions. Additionally, ABB recommends implementing defensive measures to reduce the risk of vulnerability exploitation, as outlined in the product instruction manual. Please refer to the section “Mitigation factors” for more information.
- Workaround
- No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04
Evidence and provenance
Published 7 Jan 2026 · Last source change 7 Jan 2026, 17:22 UTC · CWE-303 · Incorrect Implementation of Authentication Algorithm
CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source FIRST · tracked since 2026-08-14
?
The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.European sourceENISA EUVD · EUVD-2026-1206
Product sourceVendor CSAF · ABB Product Security Incident Response Team (PSIRT)
Remediation sourceVendor CSAF · ABB Product Security Incident Response Team (PSIRT)
CWE sourceCNA
NVD statusNVD not scheduled
Core structured fields are present and their contributing authorities are shown above.
Material change intelligence
View recent updates ↗What changed after publication
- Affected versionsThe structured affected or fixed version information changed.ABB Product Security Incident Response Team (PSIRT) ↗
- Before
- ≤ 1.1.8.k · Fixed: No fixed version is explicitly recorded in the structured CVE data.
- After
- ≤ 1.1.8.k · Fixed: The problem is corrected in the following product versions: WebPro SNMP card PowerValue version 1.1.8.p ABB advises users of the affected product versions to reach out to ABB Digital Service Support (ch.ups.digital@abb.com) for guidance and recommended actions. Additionally, ABB recommends implementing defensive measures to reduce the risk of vulnerability exploitation, as outlined in the product instruction manual. Please refer to the section “Mitigation factors” for more information.
- Remediation statusRemediation status changed from Awaiting fix to Patch available.ABB Product Security Incident Response Team (PSIRT) ↗
- Before
- Awaiting fix
- After
- Patch available
- Vendor guidanceAuthoritative vendor guidance changed: added remediation: search.abb.com/Download.aspx?DocumentID=2CRT000009&LanguageCode=en&DocumentPartId=&Action=Launch; removed remediation: nvd.nist.gov/CVE-2025-4676.ABB Product Security Incident Response Team (PSIRT) ↗
- Before
- remediation: nvd.nist.gov/CVE-2025-4676
- After
- remediation: search.abb.com/Download.aspx?DocumentID=2CRT000009&LanguageCode=en&DocumentPartId=&Action=Launch
CVE published
Fixed release recorded from official guidance
Technical terms and abbreviations used in this report
- CVE
- Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
- CVSS
- Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
- EPSS
- Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
- CWE
- Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
- CNA
- CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
- CISA ADP
- Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
- NVD
- National Vulnerability Database: NIST's enrichment service for CVE records.
- CERT / CSIRT
- A computer security incident response team that publishes warnings or coordinates incident response.
- PoC
- Proof of concept: public material that demonstrates or helps reproduce exploitation.
- CSAF
- Common Security Advisory Framework: a machine-readable format for security advisories.
- LoTL
- Living off the land: abuse of legitimate tools or system functions during an attack.