CVE-2022-26925
CVE-2022-26925 is a security flaw in Microsoft Windows, Microsoft’s operating system for PCs and servers. Attackers can make something fake look genuine in Microsoft Windows. The US Cybersecurity and Infrastructure Security Agency (CISA) added it to its catalog of flaws known to be used in attacks on 1 Jul 2022.[1]
Microsoft Windows is in things households have, such as phones, computers, browsers and everyday apps, so the fix matters at home as much as at work. Fixed in version 10.0.17763.2928, 10.0.18363.2274, 10.0.19043.1706 and 10.0.20348.707 and others.
Description
CISA calls it an LSA spoofing in Microsoft Windows. In its words: “Microsoft Windows Local Security Authority (LSA) contains a spoofing vulnerability where an attacker can coerce the domain controller to authenticate to the attacker using NTLM.”[1]
The underlying weakness is missing authentication (CWE-306), in MITRE’s list of common software weaknesses.[2]
It scores 5.9 out of 10 on the Common Vulnerability Scoring System, which rates it medium, scored by NVD using CVSS 3.1.[2]
Affected versions
NVD’s record lists these fixed versions: in each line, everything before the version shown is affected.[2]
| Product | Fixed in |
|---|---|
| Windows 10 Version 1809 | 10.0.17763.2928 |
| Windows Server 2019 | 10.0.17763.2928 |
| Windows Server 2019 (Server Core installation) | 10.0.17763.2928 |
| Windows 10 Version 1909 | 10.0.18363.2274 |
| Windows 10 Version 21H1 | 10.0.19043.1706 |
| Windows Server 2022 | 10.0.20348.707 |
| Windows 10 Version 20H2 | 10.0.19042.1706 |
| Windows Server version 20H2 | 10.0.19042.1706 |
Every device with Microsoft Windows needs the update.
Exploitation
CISA added it to its catalog of known exploited vulnerabilities on 1 Jul 2022, 52 days after it was made public. CISA lists a flaw only when it has reliable evidence of it being exploited, and gave US federal agencies until 22 Jul 2022 to fix it.[1]
FIRST’s Exploit Prediction Scoring System, which estimates how likely a flaw is to be used in attacks in the next 30 days from what it sees across the internet, puts it at 10%. That’s in the top 5% of the flaws it scores.[4]
CISA assesses it as automatable: attackers can run it against many targets at once.
CISA doesn’t say who was attacked, or how.
Fix
Microsoft has published a fix or advice.[3] CISA’s required action: “Apply remediation actions outlined in CISA guidance [https://www.cisa.gov/guidance-applying-june-microsoft-patch].”[1]
- Update Microsoft Windows now.On Windows: Settings, Windows Update, Check for updates, then restart. Office updates come the same way, or from any Office app: File, Account, Update Options. Then turn on automatic updates, so the next fix arrives on its own.
- Check you’re on 10.0.17763.2928 or later.Fixed in version 10.0.17763.2928, 10.0.18363.2274, 10.0.19043.1706 and 10.0.20348.707 and others. Anything older is what attackers are going after.
- If there’s no update, stop using it.CISA’s advice when a flaw being used in attacks has no fix is to stop using the product until it does.
Timeline
| Date | Event |
|---|---|
| The flaw is made public in the National Vulnerability Database, with a severity score of 5.9.[2] | |
| CISA adds it to its catalog of flaws known to be used in attacks.[1] | |
| CISA’s deadline for US government agencies to fix it.[1] | |
| FIRST puts the odds of it being used in attacks in the next 30 days at 10%.[4] |
See also
Other Microsoft Windows flaws
- CVE-2026-96951: command injection ·
- CVE-2026-85880: heap-based buffer overflow ·
- CVE-2026-81963: link following ·
- CVE-2008-4250: buffer overflow ·
- CVE-2026-32202: protection mechanism failure ·
- CVE-2025-60710: link following ·
Other missing authentication flaws
- CVE-2026-111357, Ivanti Connect Secure: missing authentication for critical function ·
- CVE-2026-67277, MikroTik RouterOS: missing authentication for critical function ·
- CVE-2026-81578, PaperCut NG/MF: missing authentication for critical function ·
- CVE-2026-72529, TrueConf Server: missing authentication for critical function ·
- CVE-2026-20253, Splunk Enterprise: missing authentication for critical function ·
Every Microsoft flaw on CISA’s list · Everything added in July 2022
References
- ^ Cybersecurity and Infrastructure Security Agency. “Microsoft Windows LSA Spoofing Vulnerability”. Known Exploited Vulnerabilities Catalog, added 1 Jul 2022.
- ^ National Institute of Standards and Technology. “CVE-2022-26925 Detail”. National Vulnerability Database, published 10 May 2022.
- ^ Microsoft. Advisories and fixes: msrc.microsoft.com, portal.msrc.microsoft.com.
- ^ FIRST. “Exploit Prediction Scoring System”. EPSS 0.105, percentile 95.8, 31 Oct 2026.
- CVE Program. “CVE-2022-26925”. The official CVE record.
This article is built from CISA’s catalog (version 2026.10.30), NVD’s record and FIRST’s scores, kept in HARD’s database and checked every morning. The plain English is HARD’s.