🛡️ CVE-2026-50517 — 365-copilot

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

• Attack vector: Network — reachable from anywhere that can route to the service.
• Attack complexity: Low — the attack works reliably, with no preparation.
• Privileges required: Low — an ordinary user account is enough.
• User interaction: None — nobody has to be tricked into anything.
• Scope: Changed — a successful attack reaches components beyond the vulnerable one.
• Confidentiality impact: High — total loss, or loss the attacker controls.
• Integrity impact: High — total loss, or loss the attacker controls.
• Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2026-50517 is classified as CWE-502: Deserialization of Untrusted Data. Serialised data from an untrusted source is reconstructed into objects, which can trigger code during the process.

Affected software

CVE-2026-50517 is recorded against 1 package.

• 365-copilot

Timeline and source

Published on 24 July 2026 and last revised on 29 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

msrc.microsoft.com

Other advisories for this package

365-copilot has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CVE-2026-58617 (8.1 High, published 14 Jul 2026)
• CVE-2026-50387 (7.8 High, published 14 Jul 2026)
• CVE-2026-48561 (9.6 Critical, published 14 Jul 2026)
• CVE-2026-41106 (9.3 Critical, published 2 Jul 2026)
• CVE-2026-42895 (6.5 Medium, published 19 Jun 2026)
• CVE-2026-47645 (8.8 High, published 19 Jun 2026)
• CVE-2026-54130 (9.8 Critical, published 18 Jun 2026)
• CVE-2026-45474 (8.4 High, published 9 Jun 2026)

Same weakness in other software

These advisories are the same class of weakness (CWE-502: Deserialization of Untrusted Data) in other software:

• CVE-2026-59940 (9.8 Critical, published 18 Aug 2026)
• CVE-2026-47058 (8.0 High, published 17 Aug 2026)

Details

Affected Packages

References