CVE-2025-49704
CVE-2025-49704 is a security flaw in Microsoft SharePoint, Microsoft’s software for company intranets and shared documents. Attackers can run their own code on Microsoft SharePoint. The US Cybersecurity and Infrastructure Security Agency (CISA) added it to its catalog of flaws known to be used in attacks on 22 Jul 2025, and says ransomware gangs have used it.[1]
Microsoft SharePoint is business software or equipment. Most families won’t have it, but attackers break into it to get inside companies, and from there to what those companies hold about their customers, patients and staff. Fixed in version 16.0.5508.1000 and 16.0.10417.20027.
Description
CISA calls it a code injection in Microsoft SharePoint. In its words: “Microsoft SharePoint contains a code injection vulnerability that could allow an authorized attacker to execute code over a network. This vulnerability could be chained with CVE-2025-49706. CVE-2025-53770 is a patch bypass for CVE-2025-49704, and the updates for CVE-2025-53770 include more robust protection than those for CVE-2025-49704.”[1]
The underlying weakness is code injection (CWE-94), in MITRE’s list of common software weaknesses.[2]
It scores 8.8 out of 10 on the Common Vulnerability Scoring System, which rates it high, scored by the organisation that published the CVE 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 |
|---|---|
| Microsoft SharePoint Enterprise Server 2016 | 16.0.5508.1000 |
| Microsoft SharePoint Server 2019 | 16.0.10417.20027 |
Most families won’t have Microsoft SharePoint; it’s for whoever looks after IT at work.
Exploitation
CISA added it to its catalog of known exploited vulnerabilities on 22 Jul 2025, 14 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 23 Jul 2025 to fix it.[1] CISA says ransomware gangs have used it.
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 over 99%. That’s in the top 1% of the flaws it scores.[4]
CISA assesses it as not automatable: each attack takes some work.
CISA doesn’t say who was attacked, or how.
Fix
Microsoft has published a fix or advice.[3] CISA’s required action: “Disconnect public-facing versions of SharePoint Server that have reached their end-of-life (EOL) or end-of-service (EOS) to include SharePoint Server 2013 and earlier versions.”[1]
- Check whether you use it.Microsoft SharePoint is business software or equipment, so most families won’t have it. If you run a business, or work from home on company equipment, ask whoever looks after your IT.
- Send this page to your IT person.Ask them to confirm it’s fixed (fixed in version 16.0.5508.1000 and 16.0.10417.20027), or not in use. CISA gave US government agencies until 23 Jul 2025 to fix it.
- If it can’t be fixed, take it offline.CISA’s advice when there’s no fix is to stop using the product, or take it off the internet, until there is one.
You can’t fix someone else’s server, but you can watch for what follows a break-in like this: a breach notice, a password reset you didn’t ask for, or a scam message that knows things it shouldn’t. HARD watches for those for you and your family.
Timeline
| Date | Event |
|---|---|
| The flaw is made public in the National Vulnerability Database, with a severity score of 8.8.[2] | |
| CISA adds it to its catalog of flaws known to be used in attacks, noting that ransomware gangs have used it.[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 over 99%.[4] |
See also
Other Microsoft SharePoint flaws
- CVE-2026-65660: code injection ·
- CVE-2026-55040: weak authentication ·
- CVE-2026-50522: deserialization of untrusted data ·
- CVE-2026-58644: deserialization of untrusted data ·
- CVE-2026-20963: deserialization of untrusted data ·
- CVE-2025-49706: improper authentication ·
Other Microsoft flaws
- CVE-2026-96951, Microsoft Windows: command injection ·
- CVE-2026-85880, Microsoft Windows: heap-based buffer overflow ·
- CVE-2026-81963, Microsoft Windows: link following ·
- CVE-2019-1068, Microsoft SQL Server: remote code execution ·
- CVE-2026-33824, Microsoft Internet Key Exchange (IKE) Service Extensions: double free ·
Other code injection flaws
- CVE-2026-0322, Palo Alto Networks PAN-OS: code injection ·
- CVE-2026-60004, Gitea: code injection ·
- CVE-2026-72530, TrueConf Server: code injection ·
- CVE-2025-62593, Ray-Project Ray: code injection ·
- CVE-2026-9198, IBM Langflow: code injection ·
Added the same day
- CVE-2025-6558, Chrome and other Chromium browsers: ANGLE and GPU improper input validation ·
- CVE-2025-54309, CrushFTP: unprotected alternate channel ·
- CVE-2025-49706, Microsoft SharePoint: improper authentication ·
- CVE-2025-2776, SysAid On-Prem: on-prem improper restriction of XML external entity reference ·
- CVE-2025-2775, SysAid On-Prem: on-prem improper restriction of XML external entity reference ·
Every Microsoft flaw on CISA’s list · Everything added in July 2025
References
- ^ Cybersecurity and Infrastructure Security Agency. “Microsoft SharePoint Code Injection Vulnerability”. Known Exploited Vulnerabilities Catalog, added 22 Jul 2025.
- ^ National Institute of Standards and Technology. “CVE-2025-49704 Detail”. National Vulnerability Database, published 8 Jul 2025.
- ^ Microsoft. Advisories and fixes: microsoft.com, msrc.microsoft.com.
- ^ FIRST. “Exploit Prediction Scoring System”. EPSS 1.000, percentile 100.0, 31 Oct 2026.
- CVE Program. “CVE-2025-49704”. 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.