CVE-2025-20352
Confirmed PUBLISHEDA vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software and Cisco IOS XE Software could allow the...
1 day faster than CISA KEV
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software and Cisco IOS XE Software could allow the following: An authenticated, remote attacker with low privileges could cause a denial of service (DoS) condition on an affected device that is running Cisco IOS Software or Cisco IOS XE Software. To cause the DoS, the attacker must have the SNMPv2c or earlier read-only community string or valid SNMPv3 user credentials. An authenticated, remote attacker with high privileges could execute code as the root user on an affected device that is running Cisco IOS XE Software. To execute code as the root user, the attacker must have the SNMPv1 or v2c read-only community string or valid SNMPv3 user credentials and administrative or privilege 15 credentials on the affected device. An attacker could exploit this vulnerability by sending a crafted SNMP packet to an affected device over IPv4 or IPv6 networks. This vulnerability is due to a stack overflow condition in the SNMP subsystem of the affected software. A successful exploit could allow a low-privileged attacker to cause the affected system to reload, resulting in a DoS condition, or allow a high-privileged attacker to execute arbitrary code as the root user and obtain full control of the affected system. Note: This vulnerability affects all versions of SNMP.
- CVE Published
- Sep 24, 2025
- Exploitation Reported
- Jun 01, 2026
- CVSS
- 7.7 High
- EPSS
- 37.6%
Affected Versions
1,096 version rows · page 24 of 44
| Vendor | Product | Version | Status |
|---|---|---|---|
| Cisco |
IOS
|
15.5(1)SY15 |
Affected |
| Cisco |
IOS
|
15.3(3)JF |
Affected |
| Cisco |
IOS
|
15.3(3)JF1 |
Affected |
| Cisco |
IOS
|
15.3(3)JF2 |
Affected |
| Cisco |
IOS
|
15.3(3)JF4 |
Affected |
| Cisco |
IOS
|
15.3(3)JF5 |
Affected |
| Cisco |
IOS
|
15.3(3)JF6 |
Affected |
| Cisco |
IOS
|
15.3(3)JF7 |
Affected |
| Cisco |
IOS
|
15.3(3)JF8 |
Affected |
| Cisco |
IOS
|
15.3(3)JF9 |
Affected |
| Cisco |
IOS
|
15.3(3)JF10 |
Affected |
| Cisco |
IOS
|
15.3(3)JF11 |
Affected |
| Cisco |
IOS
|
15.3(3)JF12 |
Affected |
| Cisco |
IOS
|
15.3(3)JF12i |
Affected |
| Cisco |
IOS
|
15.3(3)JF14 |
Affected |
| Cisco |
IOS
|
15.3(3)JF14i |
Affected |
| Cisco |
IOS
|
15.3(3)JF15 |
Affected |
| Cisco |
IOS
|
15.3(3)JCA7 |
Affected |
| Cisco |
IOS
|
15.3(3)JCA8 |
Affected |
| Cisco |
IOS
|
15.3(3)JCA9 |
Affected |
| Cisco |
IOS
|
15.7(3)M |
Affected |
| Cisco |
IOS
|
15.7(3)M1 |
Affected |
| Cisco |
IOS
|
15.7(3)M0a |
Affected |
| Cisco |
IOS
|
15.7(3)M3 |
Affected |
| Cisco |
IOS
|
15.7(3)M2 |
Affected |
CVE References
- cisco-sa-snmp-x4LPhte sec.cloudapps.cisco.com · CVE Record https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurity...
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 |
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:L/UI:N/S:C/C:N/I:N/A:H
Exploitation Status
Exploited in the wild
Recorded 2026-06-01 10:41:17 UTC · CVE
Weaknesses (CWE)
-
Stack-based Buffer Overflow
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
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
-
17:10 UTC 10 months ago17:10 UTC · 10 months ago
CVE published
Vulnerability disclosed publicly
-
19:15 UTC almost 2 years ago19:15 UTC · almost 2 years 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-2025-20352
{
"cve_id": "CVE-2025-20352",
"title": "A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of...",
"affected_vendor": "Cisco",
"affected_product": "IOS, Cisco IOS XE Software, Cisco IOS XE Catalyst SD-WAN",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 7.7,
"epss_score": 0.37613,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}