NVD / CVE Program· CNA cisco

CVE-2026-76461: Cisco Secure Email Gateway SQL Injection Vulnerability

CriticalCVSS 9.8 · v3.1KEVWeaponized No fix recorded

Noroxi assessment

Priority: Now (action score 81/100)

CISA has confirmed exploitation in the wild (Sep 14, 2026). Remediation deadline for US federal agencies: Sep 17, 2026.
A ready-made attack module is public (Metasploit); exploiting it takes no special expertise.
Probability of exploitation in the next 30 days: 40.1% (FIRST EPSS); higher than 98.6% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to CISA the attack is automatable: targets can be found by mass scanning.
According to the record, no fixed version is available yet.

Patch today or shut off access. 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 email parsing of Cisco AsyncOS Software for Cisco Secure Email Gateway could allow an unauthenticated, remote attacker to execute arbitrary commands with root privileges on the underlying operating system. This vulnerability is due to insufficient validation in the email parsing logic. An attacker could exploit this vulnerability by sending a crafted email message that contains malicious SQL statements through an affected device. A successful exploit could allow the attacker to execute arbitrary SQL statements, leading to command execution with root privileges on the underlying operating system.

Published: Sep 14, 2026
Updated: Sep 18, 2026
EPSS: 40.1% · 98th percentile
CWE: CWE-89

Report tools

JSON

Action score

Now

Patch today or shut off access.

CVSS: 39 / 40 · 9.8 / 10
CISA KEV: 30 / 30 · Listed
EPSS: 12 / 30 · 40.1%

CISA SSVC decision

Exploitation: active
Automatable: yes
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · cisco: 9.8; 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 14, 2026. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Sep 17, 2026.

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.

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.

Vendor	Product	CPE
cisco	asyncos	cpe:2.3:o:cisco:asyncos
cisco	secure email gateway virtual appliance c100v	cpe:2.3:a:cisco:secure_email_gateway_virtual_appliance_c100v
cisco	secure email gateway virtual appliance c300v	cpe:2.3:a:cisco:secure_email_gateway_virtual_appliance_c300v
cisco	secure email gateway virtual appliance c600v	cpe:2.3:a:cisco:secure_email_gateway_virtual_appliance_c600v
cisco	secure email gateway c195	cpe:2.3:h:cisco:secure_email_gateway_c195
cisco	secure email gateway c395	cpe:2.3:h:cisco:secure_email_gateway_c395
cisco	secure email gateway c695	cpe:2.3:h:cisco:secure_email_gateway_c695

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 Secure Email
- 14.0.0-698, 13.5.1-277, 13.0.0-392, 14.2.0-620, 13.0.5-007, 13.5.4-038, 14.2.1-020, 14.3.0-032, 15.0.0-104, 15.0.1-030, 15.5.0-048, 15.5.1-055 … (+11)affected

Affected versions

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

cisco asyncosbefore 15.5.5-014
cisco asyncos16.0 and later · before 16.0.4-302
cisco asyncos16.5 and later · before 16.5.0-780

Same product

cisco: all records

Other highest-scoring records for the same primary product.

CVE-2025-20393Cisco Secure Email Gateway and Cisco Secure Email and Web Manager Remote Command Execution VulnerabilityKEV
80Now
CVE-2026-76519Cisco Secure Email Gateway Arbitrary File Write VulnerabilityKEV
71This week
CVE-2022-20871Cisco Secure Web Appliance Privilege Escalation Vulnerability
36Monitor

Published before and after this one in the same product

← EarlierCVE-2025-20184Feb 5, 2025 · Cisco Secure Email and Web Manager and Secure Web Appliance Command Injection Vulnerability
28Monitor
← EarlierCVE-2025-20185Feb 5, 2025 · Cisco Secure Email and Web Manager, Secure Email Gateway, and Secure Web Appliance Privilege Escalation Vulnerability
26Monitor
← EarlierCVE-2020-3122Mar 4, 2025 · Cisco Content Security Management Appliance Information Disclosure Vulnerability
21Monitor

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

Metasploit module ×1
Proof-of-concept repository on GitHub ×4

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
Source	Kind	Date
Proof-of-concept repository on GitHub	4 repositories	2026-09-15 → 2026-09-17
Metasploit module	exploit/unix/smtp/cisco_secure_email_gateway_ecs_sqli_rceCisco Secure Email Gateway ECS Message-ID SQL Injection RCEexploit	2026-09-14

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.

MetasploitSep 14, 2026-1 d
CISA KEVSep 14, 2026-1 d
PublishedSep 14, 2026
First PoCSep 15, 2026same day
TodayNov 14, 2026+61 d

EPSS, last 120 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.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

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

Weakness class (CWE)

CWE-89 · Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

CVSS vector

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

nvd-secondary

Root cause

The query text is built by concatenating user input. The database cannot tell where the data ends and the command begins.

The bug in code

The whole CWE-89 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1const owner = req.query.owner;
2const rows = await db.query(
3  "SELECT * FROM files WHERE owner = '" + owner + "'"
4);

Fixed

1const owner = req.query.owner;
2const rows = await db.query(
3  "SELECT * FROM files WHERE owner = $1",
4  [owner]
5);

Attack context

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

Attack patterns (CAPEC)

ATT&CK techniques

—

Change log (0)

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-inj-2bLVGmhX

Show all references (1 more)

www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-76461

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

All records

Noroxi analysis

What does it mean in your environment?

We use this product, ask for help

Data sources and verification

CNA: cisco

CVE.org (CNA)Sep 18, 2026, 12:10 PM UTC
CISA ADPSep 18, 2026, 12:10 PM UTC
NVDSep 18, 2026, 12:10 PM UTC
FIRST EPSSNov 12, 2026, 12:00 AM UTC
MetasploitNov 13, 2026, 3:18 AM UTC
PoC-in-GitHubNov 13, 2026, 3:18 AM UTC

Each line is when that source was last processed for this record.