CVE-2026-26123

Q: How do I fix CVE-2026-26123?

Upgrade authenticator to 6.2511.7533 or later.

Q: Is CVE-2026-26123 being actively exploited?

Not that we know of. CVE-2026-26123 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.60% is the estimated probability that it will be exploited in the next 30 days. That is higher than 46% of all scored CVEs.

Q: How severe is CVE-2026-26123?

CVE-2026-26123 has a CVSS v3 base score of 5.5, rated important. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2026-26123 affect?

Published advisories record a fix for authenticator (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

HIGH

5.5

CVSS v3

NVD

Description

Cwe is not in rca categories in Microsoft Authenticator allows an unauthorized attacker to disclose information locally.

CWE-939

How to fix

Remediation Available

authenticatorNVD

Affected:< 6.2511.7533Fixed in:6.2511.7533CVE-2026-26123derived from NVD

Affected:< 6.8.40Fixed in:6.8.40CVE-2026-26123derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

Exploit Intelligence

0.60%probability of exploitation in 30 days

46thpercentile

Moderate risk: more likely to be exploited than 46% of all known CVEs.

References

Vendor Advisory1

msrc.microsoft.com

Related Vulnerabilities

Other CWE-939 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-11000	Medium	5.7	1.2%	-	Fix
CVE-2021-31384	High	7.2	1.1%	-	-
CVE-2022-20736	Medium	5.3	1.0%	-	Fix
CVE-2023-43582	Medium	5.5	0.7%	-	Fix
CVE-2024-33606	High	8.8	0.5%	-	Fix
CVE-2026-35394	High	8.3	0.4%	-	Fix

Common questions

How do I fix CVE-2026-26123?

Upgrade authenticator to 6.2511.7533 or later.

Is CVE-2026-26123 being actively exploited?

Not that we know of. CVE-2026-26123 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.60% is the estimated probability that it will be exploited in the next 30 days. That is higher than 46% of all scored CVEs.

How severe is CVE-2026-26123?

CVE-2026-26123 has a CVSS v3 base score of 5.5, rated important. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-26123 affect?

Published advisories record a fix for authenticator (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2026-26123

Markdown

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-03-13.