CVE-2026-26123: Cwe is not in rca categories in Microsoft Authenticator allows an unauthorized attacker to disclose informatio

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

authenticator: upgrade to 6.8.40; authenticator: upgrade to 6.2511.7533. Exact commands for each OS are on this page.

Q: Is CVE-2026-26123 being exploited?

CVE-2026-26123 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-26123 affect?

CVE-2026-26123 affects authenticator, authenticator. Severity is medium (CVSS 5.5). Cwe is not in rca categories in Microsoft Authenticator allows an unauthorized attacker to disclose information locally.

Q: How urgent is CVE-2026-26123?

Priority 37/100. On your watchlist

Routine

MEDIUM 5.5WATCHLISTUPGRADEUPGRADE

CVE-2026-26123 is a medium-severity flaw (CVSS 5.5) affecting authenticator, authenticator. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.6% (top 50%)
CISA exploited list	No
Weakness	CWE-939
Published	2026-03-10
Last modified	2026-06-17

Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-10 20:16 UTCPublished CVE record published
2026-06-17 10:25 UTCUpdated Record last modified

microsoft authenticator UPGRADE

Affected: < 6.8.40

Fixed in: 6.8.40

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy authenticator || rpm -q authenticator || authenticator --version

2. UPGRADE to 6.8.40 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade authenticator

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade authenticator

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

microsoft authenticator UPGRADE

Affected: < 6.2511.7533

Fixed in: 6.2511.7533

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy authenticator || rpm -q authenticator || authenticator --version

2. UPGRADE to 6.2511.7533 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade authenticator

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade authenticator

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-26123?

authenticator: upgrade to 6.8.40; authenticator: upgrade to 6.2511.7533. Exact commands for each OS are on this page.

Is CVE-2026-26123 being exploited?

CVE-2026-26123 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-26123 affect?

CVE-2026-26123 affects authenticator, authenticator. Severity is medium (CVSS 5.5). Cwe is not in rca categories in Microsoft Authenticator allows an unauthorized attacker to disclose information locally.

How urgent is CVE-2026-26123?

Priority 37/100. On your watchlist

Related CVEs

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CVE-2025-54154 MEDIUM 6.8 UPGRADE An improper authentication vulnerability has been reported to affect QNAP Authenticator
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References

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