Skip to content
Noroxi
NVD / CVE Program· CNA cisco

CVE-2025-20352: A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software and Cisco IOS XE Software could allow the…

HighCVSS 7.7 · v3.1KEVWeaponized No fix recorded

Noroxi assessment

Priority: This week (action score 72/100)

  • CISA has confirmed exploitation in the wild (Sep 29, 2025). Remediation deadline for US federal agencies: Oct 20, 2025.
  • Probability of exploitation in the next 30 days: 40.5% (FIRST EPSS); higher than 98.6% of all records.
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Don’t wait for the next maintenance window. Until a fix is released, restrict access to the affected component and follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

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.

Published
Sep 24, 2025
Updated
Sep 25, 2026
EPSS
40.5% · 98th percentile

Report tools

JSON

Action score

72

This week

Don’t wait for the next maintenance window.

CVSS
30 / 40 · 7.7 / 10
CISA KEV
30 / 30 · Listed
EPSS
12 / 30 · 40.5%

CISA SSVC decision

Exploitation
active
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · cisco
7.7
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Sep 29, 2025. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Oct 20, 2025.

Get told when this record changes

  • In CISA KEV: exploitation in the wild confirmed
  • Weaponized exploit exists
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-20352

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits every 10 minutes on paid plans, on the hour on the free plan.

Your free account also gets you

  • CVE alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools, at most 30 a day (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for cisco records
Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
ciscoios xe sd-wan
ciscoios xe
ciscoios

Versions reported by the vendor

Affected version ranges reported by the assigning authority (cisco). Independent of NVD's CPE analysis and usually ahead of it.

  • 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, 16.10.3, 16.10.3a, 16.10.3b, 16.10.4, 16.10.5, 16.10.6 … (+9)affected

  • Cisco Cisco IOS XE Software

    • 3.5.0E, 3.5.1E, 3.5.2E, 3.5.3E, 3.6.0E, 3.6.1E, 3.6.2aE, 3.6.2E, 3.6.3E, 3.6.4E, 3.6.5E, 3.6.6E … (+28)affected

  • 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, 12.2(55)SE4, 12.2(58)SE2, 12.2(55)SE5, 12.2(55)SE6, 12.2(55)SE7, 12.2(55)SE8 … (+28)affected
Affected versions · NVD (20)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • cisco ios12.2(33)sxi
  • cisco ios12.2(33)sxi1
  • cisco ios12.2(33)sxi10
  • cisco ios12.2(33)sxi11
  • cisco ios12.2(33)sxi12
  • cisco ios12.2(33)sxi13
  • cisco ios12.2(33)sxi14
  • cisco ios12.2(33)sxi2
  • cisco ios12.2(33)sxi2a
  • cisco ios12.2(33)sxi3
  • cisco ios12.2(33)sxi4
  • cisco ios12.2(33)sxi4a
  • cisco ios12.2(33)sxi5
  • cisco ios12.2(33)sxi6
  • cisco ios12.2(33)sxi7
  • cisco ios12.2(33)sxi8
  • cisco ios12.2(33)sxi8a
  • cisco ios12.2(33)sxi9
  • cisco ios12.2(33)sxj
  • cisco ios12.2(33)sxj1

Same product

cisco: all records

Other highest-scoring records for the same primary product.

  • CVE-2021-34727Cisco IOS XE SD-WAN Software Buffer Overflow Vulnerability
    40Plan
  • CVE-2021-1301Cisco SD-WAN Buffer Overflow Vulnerabilities
    40Plan
  • CVE-2021-1300Cisco SD-WAN Buffer Overflow Vulnerabilities
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2023-20035Mar 23, 2023 · Cisco IOS XE SD-WAN Software Command Injection Vulnerability
    31Monitor
  • ← EarlierCVE-2024-20373Nov 15, 2024 · Cisco IOS and Cisco IOS XE SNMP Extended ACL Bypass Vulnerability
    21Monitor
  • ← EarlierCVE-2025-20151May 7, 2025 · Cisco IOS and IOS XE Software SNMPv3 Configuration Restriction Vulnerability
    17Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:72025-09-25

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoCsame day
  3. CISA KEV+4 d
  4. TodayNov 14, 2026+415 d
EPSS, last 120 days-1% in 7 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-121 · Stack-based Buffer Overflow

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records