CVE-2022-25356

MEDIUMNVD 5.35.3—Weaponized

5.3

Alt-N MDaemon Security Gateway through 8.5.0 allows SecurityGateway.dll?view=login XML Injection.

CVSS v3: 5.3
EG Score: 5.3(medium)
EPSS: 98.8%
KEV: Not listed

Published

April 5, 2022

Last Modified

September 5, 2025

References (7)

cve@mitrehttps://www.altn.com/Products/SecurityGateway-Email-Firewall/
cve@mitrehttps://www.swascan.com/security-advisory-alt-n-security-gateway/
cve@mitrehttps://www.swascan.com/security-blog/
af854a3a-2127-422b-91ae-364da2661108https://www.altn.com/Products/SecurityGateway-Email-Firewall/
af854a3a-2127-422b-91ae-364da2661108https://www.swascan.com/security-advisory-alt-n-security-gateway/
af854a3a-2127-422b-91ae-364da2661108https://www.swascan.com/security-blog/
134c704f-9b21-4f2e-91b3-4a467353bcc0https://www.tinextacyber.com/security-advisory-alt-n-security-gataway-cve-2022-25356/

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-91XML Injection

Data Freshness Timeline

(refreshed 9× in last 7d / 12× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-23 08:49 UTCEG score recompute
2026-05-23 08:49 UTCGHSA enrichment

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Nucleihttp/cves/2022/CVE-2022-25356.yaml
First seen Jan 1, 2022
Alt-n/MDaemon Security Gateway <=8.5.0 - XML Injection
Open source ↗

Frequently asked(5)

What is CVE-2022-25356?

CVE-2022-25356 is a medium vulnerability published on April 5, 2022. Alt-N MDaemon Security Gateway through 8.5.0 allows SecurityGateway.dll?view=login XML Injection.

When was CVE-2022-25356 disclosed?

CVE-2022-25356 was first published in the National Vulnerability Database on April 5, 2022, with the most recent update on September 5, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2022-25356 actively exploited?

CVE-2022-25356 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 98.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2022-25356?

CVE-2022-25356 has a CVSS v3 base score of 5.3 (NVD).

How do I remediate CVE-2022-25356?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-25356, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2022-25356

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