CVE-2026-18897

Description

A vulnerability was identified in UTT HiPER 1250GW up to v3.2.7-210907-180535. The impacted element is the function strcpy of the file /goform/getOneApConfTempEntry. The manipulation of the argument tempName leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.

Overview

State: PUBLISHED
Assigner (CNA): VulDB
CVSS severity: HIGH
CVSS score: 8.7 / 10
CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
Effective score: 8.7 / 10 HIGH source: CNA overview
CWE(s): CWE-121, CWE-119
Reserved: 2026-08-04
Published: 2026-08-05 02:00 UTC
Last updated: 2026-08-05 02:00 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/18xxx/CVE-2026-18897.json
Linked Threat: CVE-2026-18897 — UTT HiPER 1250GW getOneApConfTempEntry strcpy stack-based overflow

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: 2026-08-05 02:16:37 UTC
NVD last modified: 2026-08-05 16:16:55 UTC
NVD CVSS v3.1: 8.8 / 10 HIGH source: cna@vuldb.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploitability subscore: 2.8 / 10
Impact subscore: 5.9 / 10
EPSS score: 0.0057 (probability of exploitation in next 30 days)
EPSS percentile: 43.82% vs all CVEs — higher = more likely to be exploited, as of 2026-08-05

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-2026-53022
Assigner: VulDB
Published: Aug 5, 2026, 2:00:12 AM
Updated: Aug 5, 2026, 2:54:00 PM
EUVD base score (CVSS 4.0): 8.7 / 10
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
EUVD-reported EPSS: 0.0000
Vendors: UTT
Products: HiPER 1250GW (v3.2.7-210907-180535)
Aliases: GHSA-74mg-chvx-67jh

ENISA description: A vulnerability was identified in UTT HiPER 1250GW up to v3.2.7-210907-180535. The impacted element is the function strcpy of the file /goform/getOneApConfTempEntry. The manipulation of the argument tempName leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.

EUVD references (5)

Affected products (1)

Vendor	Product	Versions	Platforms
UTT	HiPER 1250GW	`v3.2.7-210907-180535` (affected)	—

Vendor references (5)

References embedded in the original CVE record by the assigning CNA.

VDB-385932 | UTT HiPER 1250GW getOneApConfTempEntry strcpy stack-based overflow vdb-entrytechnical-description
VDB-385932 | CTI Indicators (IOB, IOC, IOA) signaturepermissions-required
CVE-2026-18897 | CVE Analysis and Report third-party-advisory
Submit #858617 | UTT HiPER 1250GW <=v3.2.7-210907-180535 Buffer Overflow third-party-advisory
https://github.com/7wkajk/CVE-VUL/blob/main/102.md exploit

MITRE references (5) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

https://github.com/7wkajk/CVE-VUL/blob/main/102.md exploit
Submit #858617 | UTT HiPER 1250GW <=v3.2.7-210907-180535 Buffer Overflow third-party-advisory
VDB-385932 | UTT HiPER 1250GW getOneApConfTempEntry strcpy stack-based overflow vdb-entry, technical-description
VDB-385932 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-18897 | CVE Analysis and Report third-party-advisory

Web references (10)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search. Last searched: 2026-08-05 17:05 UTC.

Max-severity Exchange server flaw under active exploitation by Kremlin ... web:arstechnica.com
Russian state hackers are using a maximum-severity vulnerability in Microsoft Outlook's Exchange Server to backdoor unpatched machines and steal credentials and other confidential information ...
Current Common Vulnerabilities and Exposures - Feedly web:feedly.com
Welcome to Feedly CVEs — Research critical vulnerabilities ( CVEs ) with all the real-time and historical information you need to assess the risk to your organization. This free resource uses Feedly's AI to synthesize and analyze vulnerability information from across the web, including estimating CVSS scores up to 3 days before it's reported to the NVD.
Known Exploited Vulnerabilities Catalog - CISA web:www.cisa.gov
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild. Organizations should use the KEV catalog as an input to their vulnerability management prioritization framework. Learn more about ...
CISA Adds One Known Exploited Vulnerability to Catalog web:www.cisa.gov
CISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation.
Microsoft security advisory (AV26-473) - Update 1 web:www.cyber.gc.ca
Microsoft security advisory (AV26-473) - Update 1 Serial number: AV26-473 Date: May 15, 2026 On May 14, 2026 , Microsoft published a security advisory to address a critical vulnerability in the following products: Microsoft Exchange Server 2016 on premises versions (any update level)
CVE-2026-17897 Common Vulnerabilities and Exposures | SUSE web:www.suse.com
Secure your Linux systems from CVE - 2026 -17897. Stay ahead of potential threats with the latest security updates from SUSE.
CVE-2026-18897 - High Vulnerability - TheHackerWire web:www.thehackerwire.com
To protect against CVE-2026-18897 , you should: (1) Apply the latest security patches from the vendor, (2) Check official security advisories for specific remediation steps, (3) Update affected software to the latest version, and (4) Monitor your systems for any signs of exploitation. When was CVE-2026-18897 disclosed?
Nvd - Cve-2026-17897 web:nvd.nist.gov
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
Nvd - Cve-2026-42897 web:nvd.nist.gov
Description Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
Addressing Exchange Server May 2026 vulnerability CVE-2026-42897 web:techcommunity.microsoft.com
On May 14, 2026 , Microsoft disclosed CVE - 2026 -42897, a reported vulnerability affecting Exchange Outlook Web Access (OWA). An attacker could exploit this issue by sending a specially crafted email to a user.

NVD-tagged references (5)

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://github.com/7wkajk/CVE-VUL/blob/main/102.md cna@vuldb.com
https://vuldb.com/cve/CVE-2026-18897 cna@vuldb.com
https://vuldb.com/submit/858617 cna@vuldb.com
https://vuldb.com/vuln/385932 cna@vuldb.com
https://vuldb.com/vuln/385932/cti cna@vuldb.com

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

NVD - cve-2026-18897

web:nvd.nist.gov

Description A vulnerability was identified in UTT HiPER 1250GW up to v3.2.7-210907-180535. The impacted element is the function strcpy of the file /goform/getOneApConfTempEntry. The manipulation of the argument tempName leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit is publicly available and might be used. The vendor was contacted early about this ...

2026-08-05 16:41 UTC
Microsoft's Exchange Server Updates Fix OWA XSS Flaw

web:petri.com

Microsoft's June 2026 Exchange Server Updates Fix OWA XSS Vulnerability The latest Exchange Server update addresses web access risks and introduces requirements for continued mitigation support.

2026-08-05 16:41 UTC
Addressing Exchange Server May 2026 vulnerability CVE-2026-42897 ...

web:techcommunity.microsoft.com

Hi team, Our organization has successfully implemented the recommended mitigation for CVE - 2026 -42897. However, we are currently experiencing the documented known issues within our environment. Could the Exchange team kindly provide a tentative timeline or ETA for a permanent security update that resolves the underlying vulnerability while addressing these known issues? We would greatly ...

2026-08-05 16:41 UTC
Released: June 2026 Exchange Server Security Updates

web:techcommunity.microsoft.com

Are those solved in the CVE - 2026 -42897 fix (June 2026 SU)? Yes, when June 2026 SU is installed and mitigation is removed, known issues should be resolved too. But note that mitigations do not get removed automatically after installation of the SU (and we recommend that you keep then enabled for a little while longer).

2026-08-05 16:41 UTC
CISA Issues Urgent Alert: Microsoft Exchange Server Zero-Day (CVE-2026 ...

web:undercodetesting.com

3. Implementing the Emergency Mitigation (EEMS & EOMT) Microsoft provides a two‑pronged mitigation approach while a full patch is being developed. The primary method is the Exchange Emergency Mitigation Service (EEMS) , which is enabled by default and automatically applies a URL rewrite rule to block the attack vector.

2026-08-05 16:41 UTC
CVE-2026-42897 Exchange OWA Mitigation M2: What Admins Must Verify

web:windowsforum.com

The mitigation name administrators should verify for CVE - 2026 -42897 is M2. Exchange Server 2016, Exchange Server 2019, and Exchange Server Subscription Edition are affected at any update level, while Exchange Online is not affected.

2026-08-05 16:41 UTC
Exchange Server Security Update Fixes Exploited Outlook Web Access XSS Flaw

web:windowsreport.com

Before releasing the permanent fix , Microsoft rolled out automatic protections through the Exchange Emergency Mitigation Service in mid-May. The temporary mitigation was designed to reduce the risk of exploitation while the company finalized and tested security updates for supported Exchange Server versions.

2026-08-05 16:41 UTC
Vulnerability in Exchange OWA: CVE-2026-42897 (May 2026)

web:www.frankysweb.de

Microsoft has reported the vulnerability CVE - 2026 -42897 with CVSS 8.1, High severity in all Exchange Server versions. A mitigation is available.

2026-08-05 16:41 UTC
Exchange Server OWA Zero-Day CVE-2026-42897 Exploited With No Permanent ...

web:www.techtimes.com

Exchange Server OWA Zero-Day CVE - 2026 -42897 Exploited With No Permanent Patch and New Mitigation Gaps Microsoft's emergency fix for on-premises Exchange breaks OWA calendar printing and leaves ...

2026-08-05 16:41 UTC
CVE-2026-18897 - High Vulnerability - TheHackerWire

web:www.thehackerwire.com

How do I fix or mitigate CVE-2026-18897 ? To protect against CVE-2026-18897 , you should: (1) Apply the latest security patches from the vendor, (2) Check official security advisories for specific remediation steps, (3) Update affected software to the latest version, and (4) Monitor your systems for any signs of exploitation.

2026-08-05 16:41 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-18897.json.

{
  "containers": {
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      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:utt:hiper_1250gw:*:*:*:*:*:*:*:*"
          ],
          "product": "HiPER 1250GW",
          "vendor": "UTT",
          "versions": [
            {
              "status": "affected",
              "version": "v3.2.7-210907-180535"
            }
          ]
        }
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      "credits": [
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          "type": "reporter",
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        }
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      "metrics": [
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      ],
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