How severe is CVE-2026-83746?

CVE-2026-83746 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2026-83746 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-83746?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-83746 published?

CVE-2026-83746 was published on 2026-10-13.

CVE-2026-83746

CVE-2026-83746 is a high-severity vulnerability with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-36.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-36
Published: 2026-10-13
Last modified: 2026-10-13

Description

Absolute path traversal in Skype for Business and Microsoft Lync allows an authorized attacker to elevate privileges over a network.

Frequently asked questions

What is CVE-2026-83746?: Absolute path traversal in Skype for Business and Microsoft Lync allows an authorized attacker to elevate privileges over a network.
How severe is CVE-2026-83746?: CVE-2026-83746 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2026-83746 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-83746?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-83746 published?: CVE-2026-83746 was published on 2026-10-13.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83746

Other CWE-36 vulnerabilities

CVE-2023-3765 — Critical (CVSS 10.0): Absolute Path Traversal in GitHub repository mlflow/mlflow prior to 2.5.0.
CVE-2026-68487 — Critical (CVSS 9.9): Path traversal in Plesk's Backup Manager causes arbitrary file write as root by an authenticated customer.
CVE-2025-34392 — Critical (CVSS 9.8): Barracuda Service Center, as implemented in the RMM solution, in versions prior to 2025.1.1, does not verify the URL…
CVE-2025-0851 — Critical (CVSS 9.8): A path traversal issue in ZipUtils.unzip and TarUtils.untar in Deep Java Library (DJL) on all platforms allows a bad…
CVE-2024-13161 — Critical (CVSS 9.8): Absolute path traversal in Ivanti EPM before the 2024 January-2025 Security Update and 2022 SU6 January-2025 Security…
CVE-2024-13160 — Critical (CVSS 9.8): Absolute path traversal in Ivanti EPM before the 2024 January-2025 Security Update and 2022 SU6 January-2025 Security…

Browse all CWE-36 vulnerabilities →