How severe is CVE-2022-26911?

CVE-2022-26911 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2022-26911 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-26911?

CVE-2022-26911 primarily affects Microsoft Lync Server. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-26911?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-26911 published?

CVE-2022-26911 was published on 2022-04-15 and last updated on 2026-06-17.

CVE-2022-26911

CVE-2022-26911 is a medium-severity vulnerability in Microsoft Lync Server with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Lync Server
Published: 2022-04-15
Last modified: 2026-06-17

Description

Skype for Business Information Disclosure Vulnerability

Frequently asked questions

What is CVE-2022-26911?: Skype for Business Information Disclosure Vulnerability
How severe is CVE-2022-26911?: CVE-2022-26911 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2022-26911 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-26911?: CVE-2022-26911 primarily affects Microsoft Lync Server. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-26911?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-26911 published?: CVE-2022-26911 was published on 2022-04-15 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-26911

Affected products (3)

cpe:2.3:a:microsoft:lync_server:2013:cumulative_update_10:*:*:*:*:*:*
cpe:2.3:a:microsoft:skype_for_business_server:2015:cu12:*:*:*:*:*:*
cpe:2.3:a:microsoft:skype_for_business_server:2019:cu6:*:*:*:*:*:*

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