CVE-2025-20352

ENISA EUVD: EUVD-2025-31023 ↗
Exploited in the Wild ✓ Confirmed 0-Day
Triaged: March 17, 2026 5 articles Published: 2025-09-24
VulnLookup ↗ NVD ↗ EUVD ↗ MITRE ↗ CISA KEV ↗

EPSS Score

Source: FIRST.org · 2026-05-24
4.2%
probability
This CVE has a 4.2% probability of being exploited in the next 30 days.
0% Top 88.9th percentile of all CVEs 100%

CVSS v3.1

Source: VulnerabilityLookup (CIRCL)
7.7
HIGH
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Description

VulnerabilityLookup (CNA)
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.

Affected Products

Cisco
IOS
12.2(55)SE 12.2(55)SE3 12.2(55)SE2 12.2(58)SE 12.2(55)SE1 12.2(58)SE1
Cisco
Cisco IOS XE Software
3.5.0E 3.5.1E 3.5.2E 3.5.3E 3.6.0E 3.6.1E
Cisco
Cisco IOS XE Catalyst SD-WAN
16.9.1 16.9.2 16.9.3 16.9.4 16.10.1 16.10.2

Attack Intelligence

Exploits & PoC

scadastrangelove/CVE-2025-20352

CVE-2025-20352 SNMP Exposure Check (onesixtyone + parser)

6
1 repo — triés par ⭐ Rechercher sur GitHub ↗

Signal Intelligence

Confidenceⓘ
79%
EPSS 4.2%
CVSS v3.1 7.7
Mentions 5
Last Seen Sep 26, 2025

CNA Information

CNA Assigner
cisco

Analyst Note

BleepingComputer article explicitly describes CVE-2025-20352 as a 'zero-day vulnerability exploited in attacks' for Cisco IOS, confirming in-the-wild exploitation. Cisco's own PSIRT acknowledged active exploitation before the patch release on September 24, 2025, after local administrator credentials were compromised and used to trigger the flaw. The vulnerability was subsequently linked to Operation Zero Disco, a named threat campaign deploying Linux rootkits via compromised Cisco network devices.

Threat Actors 11

APT 29
apt_group Information theft and espionage 🇷🇺 RU
Hacking Team
apt_group 🇮🇹 IT
Infy
apt_group Information theft and espionage 🇮🇷 IR
ArcaneDoor
apt_group 🇨🇳 CN
APT 22
apt_group Information theft and espionage 🇨🇳 CN
APT 6
apt_group Information theft and espionage 🇨🇳 CN
Red October
apt_group 🇷🇺 RU
Operation Red Signature
apt_group Information theft and espionage 🇨🇳 CN
Shadow Network
apt_group Information theft and espionage 🇨🇳 CN
Mana Team
apt_group 🇨🇳 CN
APT 5
apt_group Information theft and espionage 🇨🇳 CN

Triage Info

Decided atMar 17, 2026
Published DateSep 24, 2025