CVE-2025-59689
Confirmed PUBLISHEDLibraesva ESG 4.5 through 5.5.x before 5.5.7 allows command injection via a compressed e-mail attachment. For ESG 5.0 a fix has been released in...
1 day faster than CISA KEV
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
Libraesva ESG 4.5 through 5.5.x before 5.5.7 allows command injection via a compressed e-mail attachment. For ESG 5.0 a fix has been released in 5.0.31. For ESG 5.1 a fix has been released in 5.1.20. For ESG 5.2 a fix has been released in 5.2.31. For ESG 5.4 a fix has been released in 5.4.8. For ESG 5.5. a fix has been released in 5.5.7.
- CVE Published
- Sep 19, 2025
- Exploitation Reported
- Jun 01, 2026
- CVSS
- 6.1 Medium
- EPSS
- 1.9%
Affected Versions
| Vendor | Product | Version | Status |
|---|---|---|---|
| Libraesva |
Email Security Gateway
|
4.5 to < 5.0.31 |
Affected |
| Libraesva |
Email Security Gateway
|
5.1 to < 5.1.20 |
Affected |
| Libraesva |
Email Security Gateway
|
5.2 to < 5.2.31 |
Affected |
| Libraesva |
Email Security Gateway
|
5.3 to < 5.4.8 |
Affected |
| Libraesva |
Email Security Gateway
|
5.5 to < 5.5.7 |
Affected |
CVE References
- libraesva.com/security-blog libraesva.com · CVE Record https://www.libraesva.com/security-blog/
- docs.libraesva.com/knowledgebase/security-advisory-command-inje... docs.libraesva.com · CVE Record https://docs.libraesva.com/knowledgebase/security-advisory-command-in...
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CVE First | 2026-06-01 10:41 UTC |
| CISA | 2026-06-02 14:05 UTC |
| Daily CyberSecurity | 2026-06-05 09:20 UTC |
No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Exploitation Status
Exploited in the wild
Recorded 2026-06-01 10:41:17 UTC · CVE
Weaknesses (CWE)
-
Improper Neutralization of Special Elements used in a Command ('Command Injection')
Recent Mentions
Daily CyberSecurity · Jun 05, 2026
Critical Zero-Day Flaw Threatens Catalyst Manager Platforms A severe security warning has been issued for corporate enterprise networking The post Cisco SD-WAN Vulnerability Exploited in the Wild with Root RCE Risks appeared first on Daily CyberSecurity. Related posts: Cisco SD-WAN Manager XXE Flaw Grants Unauthenticated Access to Private Files CVE-2025-59689: Libraesva ESG Command Injection Flaw Exploited in the Wild Under Attack: Cisco Urges Immediate Action as Hackers Actively Exploit SD-WAN Manager Flaws
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
09:20 UTC about 2 months ago09:20 UTC · about 2 months ago
KEV confirmed by Daily CyberSecurity
Exploitation attested by an external source
-
14:05 UTC about 2 months ago14:05 UTC · about 2 months ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
10:41 UTC about 2 months ago10:41 UTC · about 2 months ago
Added to KEVIntel KEV Feed
High-confidence, third-party attested exploitation
-
00:00 UTC 10 months ago00:00 UTC · 10 months ago
CVE published
Vulnerability disclosed publicly
-
00:00 UTC 10 months ago00:00 UTC · 10 months ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2025-59689
{
"cve_id": "CVE-2025-59689",
"title": "Libraesva ESG 4.5 through 5.5.x before 5.5.7 allows command injection via a c...",
"affected_vendor": "Libraesva",
"affected_product": "Email Security Gateway",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 6.1,
"epss_score": 0.01929,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}