CVE-2026-44597
📛 CVE Title
CVE-2026-44597
Description
Tor before 0.4.9.7 has an out-of-bounds read when an END, a TRUNCATE, or a TRUNCATED cell lacks a reason in its payload, aka TROVE-2026-011.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- mitre
- CVSS severity
- LOW
- CVSS score
- 3.7 / 10
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L- Effective score
- 3.7 / 10 LOW source: CNA overview
- CWE(s)
-
CWE-684 - Reserved
- 2026-05-07
- Published
- 2026-05-07 02:56 UTC
- Last updated
- 2026-05-07 15:12 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/44xxx/CVE-2026-44597.json
- Linked Threat
- CVE-2026-44597 — CVE-2026-44597
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-05-07 01:16:01 UTC
- NVD last modified
- 2026-05-07 17:34:30 UTC
- NVD CVSS v3.1
- 3.7 / 10 LOW source: cve@mitre.org
- NVD CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L- Exploitability subscore
- 2.2 / 10
- Impact subscore
- 1.4 / 10
- EPSS score
- 0.0002 (probability of exploitation in next 30 days)
- EPSS percentile
- 6.99% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD / KEV / EPSS data refreshed 2026-05-25 08:34 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-28231 - Assigner
- mitre
- Published
- May 7, 2026, 12:56:47 AM
- Updated
- May 7, 2026, 1:12:29 PM
- EUVD base score (CVSS 3.1)
-
3.7 / 10
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L - EUVD-reported EPSS
- 0.0200
- Vendors
- torproject
- Products
-
Tor (0 <0.4.9.7)
ENISA description: Tor before 0.4.9.7 has an out-of-bounds read when an END, a TRUNCATE, or a TRUNCATED cell lacks a reason in its payload, aka TROVE-2026-011.
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| torproject | Tor |
0 (affected)
|
— |
Affected products — CPE 2.3 (1) NVD
NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.
cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
Vendor references (4)
References embedded in the original CVE record by the assigning CNA.
MITRE references (4) cveawg.mitre.org
Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.
Web references (6)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- http://cwe.mitre.org/data/definitions/684.html rapid7:cwe.mitre.org
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-28231 rapid7:euvd.enisa.europa.eu
- https://attackerkb.com/topics/CVE-2026-44597 rapid7:attackerkb.com
- https://nvd.nist.gov/vuln/detail/CVE-2026-44597 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2026-44597 tenable:www.cve.org
- https://www.first.org/epss/ tenable:www.first.org
NVD-tagged references (4)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://forum.torproject.org/c/news/tor-release-announcement/28 cve@mitre.org Release Notes
- https://gitlab.torproject.org/tpo/core/tor/-/commit/8f98054b1982d00a14639864d03e9afd90b87481 cve@mitre.org Patch
- https://gitlab.torproject.org/tpo/core/tor/-/work_items/41254 cve@mitre.org Broken Link
- https://www.openwall.com/lists/oss-security/2026/05/06/8 cve@mitre.org Mailing ListThird Party Advisory
Remediations (19)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:blog.talosintelligence.com
Microsoft has released its monthly security update for May 2026 , which includes 137 vulnerabilities affecting a range of products, including 16 that Microsoft marked as "critical".
2026-05-23 21:08 UTC -
web:cyberpress.org
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two actively exploited Microsoft Defender vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, issuing an urgent remediation directive for federal agencies with a due date of June 3, 2026 .
2026-05-23 21:08 UTC -
web:fixitphill.com
Verify Microsoft emergency mitigation for exploited Exchange Server CVE - 2026 -42897 and prepare for the permanent security update.
2026-05-23 21:08 UTC -
web:purple-ops.io
While the current mitigation addresses CVE - 2026 -42897, an older vulnerability like CVE - 2026 -32201 SharePoint Spoofing demonstrates the recurring nature of spoofing attacks across Microsoft products and the importance of a complete update strategy. Remediation Actions
2026-05-23 21:08 UTC -
web:techcommunity.microsoft.com
We wanted to tell you how to address the Exchange Server May 2026 vulnerability CVE - 2026 -42897.
2026-05-23 21:08 UTC -
web:windowsforum.com
Microsoft's Fastest Fix Is a Mitigation , Not a Patch The important detail in Microsoft's May 14 notice is that there is no permanent Exchange security update available yet for CVE - 2026 -42897. Microsoft says it is working on one and will release it later for affected supported paths, but today's defensive action is mitigation .
2026-05-23 21:08 UTC -
web:www.cisecurity.org
<p>Multiple vulnerabilities have been discovered in Microsoft products, the most severe of which could allow for remote code execution. Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged-on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or ...
2026-05-23 21:08 UTC -
web:www.forbes.com
Updated May 18: This article has been updated to include further details on the emergency mitigation process recommended by Microsoft after the CVE - 2026 -42897 Exchange Server zero-day was ...
2026-05-23 21:08 UTC -
web:www.helient.com
Conclusion Helient strongly recommends customers immediately review their Exchange Server environments for exposure to CVE - 2026 -42897 and enable the appropriate mitigation . Given the active exploitation and high severity, a rapid response and validation approach is critical.
2026-05-23 21:08 UTC -
web:www.helpnetsecurity.com
A critical XSS vulnerability ( CVE - 2026 -42897) in Microsoft Exchange Server is being exploited by attackers, Microsoft warned on Thursday.
2026-05-23 21:08 UTC -
web:4sysops.com
Starting in April 2026 , Windows updates will change the default Kerberos ticket issuance behavior to AES-SHA1 for accounts without explicit encryption settings, while RC4 can still be used where explicitly enabled. This change, driven by CVE - 2026 -20833, affects every Windows Server environment where service accounts or devices still rely on RC4. Any service account, NAS device, or legacy ...
2026-05-26 02:47 UTC -
web:community.ui.com
Published: May 21, 2026 Updated: May 22, 2026 Version: 1.1 Revision: 1.1 Summary 1 of 5 A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection. Affected Products: UniFi OS Server (Version 5.0.6 and earlier) Mitigation : Update your UniFi OS Server to Version 5.0.8 or later ...
2026-05-26 02:47 UTC -
web:nvd.nist.gov
This is a potential security issue, you are being redirected to https://nvd.nist.gov
2026-05-26 02:47 UTC -
web:support.microsoft.com
The following summary outlines key issues addressed by this update. The bold text within the brackets indicates the item or area of the change. [Networking] Fixed: This update addresses a security issue in the Windows Routing and Remote Access Service (RRAS) management tool. If you connect to a malicious remote server, an attacker could disrupt the tool or run code on your device. For more ...
2026-05-26 02:47 UTC -
web:www.cve.org
At cve .org, we provide the authoritative reference method for publicly known information-security vulnerabilities and exposures
2026-05-26 02:47 UTC -
web:www.grammarly.com
Grammarly makes AI writing convenient. Work smarter with personalized AI guidance and text generation on any app or website.
2026-05-26 02:47 UTC -
web:www.oracle.com
This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.
2026-05-26 02:47 UTC -
web:www.virustotal.com
Streamline your investigations with Google Threat Intelligence Agentic and the new Dark Web (DDW) module. Perform hunting and pivoting across forums using natural language or specific modifiers. Bridge threat actor identities and map global operations easy.
2026-05-26 02:47 UTC -
web:www.windowslatest.com
Windows 11 April 2026 update adds Narrator Copilot support, faster Settings, File Explorer fixes, and key security improvements.
2026-05-26 02:47 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-44597.json.
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