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CVE-2021-33731

48
FAUCET Score

CVE-2021-33731 is a critical SQL injection vulnerability affecting all versions of Siemens SINEC NMS prior to V1.0 SP2 Update 1. A highly privileged, authenticated attacker can exploit this by sending specially crafted requests to the webserver, leading to arbitrary command execution within the local database. With a CVSS score of 7.2 (HIGH), this vulnerability presents a significant risk due to its low attack complexity and potential for complete compromise of confidentiality, integrity, and availability. Currently, there is no public exploit code available (Metasploit, Nuclei, ExploitDB), nor is there any evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0CPE matchmatch criteria
cpe:2.3:a:siemens:sinec_nms:*:*:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:siemens:sinec_nms:1.0:-:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:siemens:sinec_nms:1.0:sp1:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:siemens:sinec_nms:1.0:sp2:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.2HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
46.59%
Probability of exploitation in next 30 days
EPSS Percentile
98.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.4659 is in the 98th percentile among its peer group of 5,531 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.3 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cert-portal.siemens.com / productcert/pdf/ssa-163251.pdf
PatchVendor Advisory