CVE-2026-25177
published 2026-03-10CVE-2026-25177: Improper restriction of names for files and other resources in Active Directory Domain Services allows an authorized attacker to elevate privileges over a…
PriorityP261high8.8CVSS 3.1
AVNACLPRLUINSUCHIHAH
EPSS
1.24%
65.8th percentile
Improper restriction of names for files and other resources in Active Directory Domain Services allows an authorized attacker to elevate privileges over a network.
Affected
43 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | windows_10_1607 | < 10.0.14393.8957 | 10.0.14393.8957 |
| microsoft | windows_10_1809 | < 10.0.17763.8511 | 10.0.17763.8511 |
| microsoft | windows_10_21h2 | < 10.0.19044.7058 | 10.0.19044.7058 |
| microsoft | windows_10_22h2 | < 10.0.19045.7058 | 10.0.19045.7058 |
| microsoft | windows_10_version_1607 | >= 10.0.14393.0 < 10.0.14393.8957 | 10.0.14393.8957 |
| microsoft | windows_10_version_1809 | >= 10.0.17763.0 < 10.0.17763.8511 | 10.0.17763.8511 |
| microsoft | windows_10_version_21h2 | >= 10.0.19044.0 < 10.0.19044.7058 | 10.0.19044.7058 |
| microsoft | windows_10_version_22h2 | >= 10.0.19045.0 < 10.0.19045.7058 | 10.0.19045.7058 |
| microsoft | windows_11_23h2 | < 10.0.22631.6783 | 10.0.22631.6783 |
| microsoft | windows_11_24h2 | < 10.0.26100.7979 | 10.0.26100.7979 |
| microsoft | windows_11_25h2 | < 10.0.26200.7979 | 10.0.26200.7979 |
| microsoft | windows_11_26h1 | < 10.0.28000.1719 | 10.0.28000.1719 |
| microsoft | windows_11_version_22h3 | >= 10.0.22631.0 < 10.0.22631.6783 | 10.0.22631.6783 |
| microsoft | windows_11_version_23h2 | >= 10.0.22631.0 < 10.0.22631.6783 | 10.0.22631.6783 |
| microsoft | windows_11_version_24h2 | >= 10.0.26100.0 < 10.0.26100.8037 | 10.0.26100.8037 |
| microsoft | windows_11_version_25h2 | >= 10.0.26200.0 < 10.0.26200.8037 | 10.0.26200.8037 |
| microsoft | windows_11_version_26h1 | >= 10.0.28000.0 < 10.0.28000.1719 | 10.0.28000.1719 |
| microsoft | windows_server_2012 | — | — |
| microsoft | windows_server_2012 | >= 6.2.9200.0 < 6.2.9200.25973 | 6.2.9200.25973 |
| microsoft | windows_server_2012_r2 | >= 6.3.9600.0 < 6.3.9600.23074 | 6.3.9600.23074 |
| microsoft | windows_server_2016 | < 10.0.14393.8957 | 10.0.14393.8957 |
| microsoft | windows_server_2016 | >= 10.0.14393.0 < 10.0.14393.8957 | 10.0.14393.8957 |
| microsoft | windows_server_2019 | < 10.0.17763.8511 | 10.0.17763.8511 |
| microsoft | windows_server_2019 | >= 10.0.17763.0 < 10.0.17763.8511 | 10.0.17763.8511 |
| microsoft | windows_server_2022 | < 10.0.20348.4830 | 10.0.20348.4830 |
Detection & IOCsextracted from sources · hover to see the quote
- →Monitor for addition of specially crafted Unicode characters to Service Principal Names (SPNs) or User Principal Names (UPNs) in Active Directory, which may indicate an attempt to create duplicate SPNs/UPNs bypassing normal AD duplicate-prevention checks. ↗
- →Alert on SPN write/modification events (e.g., AD attribute 'servicePrincipalName' changes) by accounts that do not own the targeted service object, as the attack only requires SPN-write permission on any account. ↗
- →Watch for Kerberos ticket failures or service rejections followed by NTLM authentication fallback, which may indicate a duplicate SPN collision forcing NTLM downgrade. ↗
- →Successful exploitation results in SYSTEM-level privilege gain; correlate SPN manipulation events with subsequent SYSTEM-context process creation on targeted hosts. ↗
- ·The attack vector requires the attacker to already have SPN-write permission on at least one AD account; no access to the targeted server itself is needed beyond that initial permission. ↗
- ·NTLM fallback is only exploitable if NTLM authentication is enabled in the environment; disabling NTLM reduces the impact of the forced-downgrade path. ↗
- ·As of the advisory publication date, there is no public exploit and exploitation is assessed as 'Less Likely' by Microsoft. ↗
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vendor_msrc8.8HIGH
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GHSA
GHSA-f3vf-8qf4-r2f7: Improper restriction of names for files and other resources in Active Directory Domain Services allows an authorized attacker to elevate privileges ov
ghsa_unreviewed·2026-03-10
CVE-2026-25177 [HIGH] CWE-641 GHSA-f3vf-8qf4-r2f7: Improper restriction of names for files and other resources in Active Directory Domain Services allows an authorized attacker to elevate privileges ov
Improper restriction of names for files and other resources in Active Directory Domain Services allows an authorized attacker to elevate privileges over a network.
Microsoft
Active Directory Domain Services Elevation of Privilege Vulnerability
vendor_msrc·2026-03-10·CVSS 8.8
CVE-2026-25177 [HIGH] CWE-641 Active Directory Domain Services Elevation of Privilege Vulnerability
Active Directory Domain Services Elevation of Privilege Vulnerability
Description: Improper restriction of names for files and other resources in Active Directory Domain Services allows an authorized attacker to elevate privileges over a network.
FAQ: What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.
FAQ: How could an attacker exploit this vulnerability?
An attacker could exploit this issue by adding specially crafted Unicode characters to duplicate Service Principal Names (SPNs) or User Principal Names (UPNs). These characters bypass normal Active Directory checks designed to prevent duplicates. If the attacker has permission to modify SPNs on any account,
No detection rules found.
No public exploits indexed.
Sophos
March Patch Tuesday visits 15 product families
blogs_sophos·2026-03-13
March Patch Tuesday visits 15 product families
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Bleepingcomputer
Microsoft March 2026 Patch Tuesday fixes 2 zero-days, 79 flaws
blogs_bleepingcomputer·2026-03-10·CVSS 8.8
[HIGH] Microsoft March 2026 Patch Tuesday fixes 2 zero-days, 79 flaws
## Microsoft March 2026 Patch Tuesday fixes 2 zero-days, 79 flaws
## Lawrence Abrams
The number of bugs in each vulnerability category is listed below:
46 Elevation of Privilege Vulnerabilities
2 Security Feature Bypass Vulnerabilities
18 Remote Code Execution Vulnerabilities
10 Information Disclosure Vulnerabilities
4 Denial of Service Vulnerabilities
4 Spoofing Vulnerabilities
When BleepingComputer reports on Patch Tuesday security updates, we only count those released by Microsoft today. Therefore, the number of flaws does not include 9 Microsoft Edge flaws, Mariner, Payment Orchestrator Service, Azure, and Microsoft Devices Pricing Program flaws fixed earlier this month.
To learn more about the non-security updates released today, you can review our dedicated articles on the
Wiz
CVE-2026-25177 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 8.8
CVE-2026-25177 [HIGH] CVE-2026-25177 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-25177 :
vulnerability analysis and mitigation
Improper restriction of names for files and other resources in Active Directory Domain Services allows an authorized attacker to elevate privileges over a network.
Source : NVD
## 8.8
Score
Published March 10, 2026
Severity HIGH
CNA Score 8.8
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 24.5
Exploitation Probability (EPSS) 0.1
Sources
NVD
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Sophos
March Patch Tuesday visits 15 product families
blogs_sophos
March Patch Tuesday visits 15 product families
Share This
Microsoft on Tuesday released 84 patches affecting 15 product families – including a few you’ve possibly never encountered. Eight of the addressed issues are considered by Microsoft to be of Critical severity, though none of those affect Windows, nor are they expected to be exploited within the next 30 days. In addition, five of those Critical issues were in fact addressed by Microsoft in advance of Patch Tuesday itself, as we’ll discuss below. Twenty-two have a CVSS base score of 8.0 or higher, including one with a 9.8 base score. None are known to be under active exploit in the wild, but two are publicly disclosed so far.
At patch time, six CVEs are judged more likely to be exploited in the next 30 days by the company’s estimation. Various of this month’s issues are amenable
Bugzilla
CVE-2024-25177 luajit: Out of bounds read in LuaJIT [fedora-42]
bugzilla·2025-07-07·CVSS 7.5
CVE-2024-25177 [HIGH] CVE-2024-25177 luajit: Out of bounds read in LuaJIT [fedora-42]
CVE-2024-25177 luajit: Out of bounds read in LuaJIT [fedora-42]
More information about this security flaw is available in the following bug:
https://bugzilla.redhat.com/show_bug.cgi?id=2376881
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
This message is a reminder that Fedora Linux 42 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 42 on 2026-05-13.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with a
'version' of '42'.
Package Maintainer: If y
Bugzilla
CVE-2024-25177 howl: Out of bounds read in LuaJIT [fedora-42]
bugzilla·2025-07-07·CVSS 7.5
CVE-2024-25177 [HIGH] CVE-2024-25177 howl: Out of bounds read in LuaJIT [fedora-42]
CVE-2024-25177 howl: Out of bounds read in LuaJIT [fedora-42]
More information about this security flaw is available in the following bug:
https://bugzilla.redhat.com/show_bug.cgi?id=2376881
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
This message is a reminder that Fedora Linux 42 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 42 on 2026-05-13.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with a
'version' of '42'.
Package Maintainer: If you
2026-03-10
Published