CVE-2026-21264
published 2026-01-22CVE-2026-21264: Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Account allows an unauthorized attacker to perform spoofing…
PriorityP428medium6.1CVSS 3.1
AVNACLPRNUIRSCCLILAN
EPSS
0.37%
28.8th percentile
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Account allows an unauthorized attacker to perform spoofing over a network.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | microsoft_account | — | — |
| msrc | microsoft_account | — | — |
CVSS provenance
nvdv3.16.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
vendor_msrc9.3CRITICAL
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Microsoft
Microsoft Account Spoofing Vulnerability
vendor_msrc·2026-01-13·CVSS 9.3
CVE-2026-21264 [CRITICAL] CWE-79 Microsoft Account Spoofing Vulnerability
Microsoft Account Spoofing Vulnerability
Description: Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Account allows an unauthorized attacker to perform spoofing over a network.
FAQ: Why are there no links to an update or instructions with steps that must be taken to protect from this vulnerability?
This vulnerability has already been fully mitigated by Microsoft. There is no action for users of this service to take. The purpose of this CVE is to provide further transparency.
Please see Toward greater transparency: Unveiling Cloud Service CVEs for more information.
Microsoft Account: Microsoft Account
Microsoft: Microsoft
Customer Action Required: No
Impact: Spoofing
Exploit Status: Publicly Disclosed:No;Exploited:No;Latest Software
GHSA
GHSA-3h7x-hf52-fwj9: Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Account allows an unauthorized attacker to perform s
ghsa_unreviewed·2026-01-23
CVE-2026-21264 [CRITICAL] CWE-79 GHSA-3h7x-hf52-fwj9: Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Account allows an unauthorized attacker to perform s
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Account allows an unauthorized attacker to perform spoofing over a network.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-01-22
Published