High Insecure deserialization

CVE-2023-30899 — A vulnerability has been identified in Siveillance Video 2020 R2 (All versions < V20.2...

A vulnerability has been identified in Siveillance Video 2020 R2 (All versions < V20.2 HotfixRev14), Siveillance Video 2020 R3 (All versions < V20.3 HotfixRev12), Siveillance Video 2021 R1 (All versions < V21.1 HotfixRev12), Siveillance Video 2021 R2 (All versions < V21.2 HotfixRev8), Siveillance Video 2022 R1 (All versions < V22.1 HotfixRev7), Siveillance Video 2022 R2 (All versions < V22.2 HotfixRev5), Siveillance Video 2022 R3 (All versions < V22.3 HotfixRev2), Siveillance Video 2023 R1 (All versions < V23.1 HotfixRev1). The Management Server component of affected applications deserializes data without sufficient validations. This could allow an authenticated remote attacker to execute code on the affected system.

Published May 9, 2023 · Updated Oct 23, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: siemens

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 1.1% (30-day exploitation probability)+10
Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

1.11%

ahead of 66% of scored CVEs · Oct 28, 2026

Affects

Siemens

Siveillance Video and 8 more

CVSS base

8.8

High · 4 source(s)

Prioritization reference: 9.9 provisional

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

None

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Total

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Siemens Siveillance Video, Siemens Siveillance Video 2020 R2, Siemens Siveillance Video 2020 R3…).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes matching the vulnerability class (insecure deserialization), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Siemens	Siveillance Video	version 2020-r2version 2020-r3version 2021-r1version 2021-r2version 2022-r1version 2022-r2version 2022-r3version 2023-r1	Vulnerable	NIST National Vulnerability Database
Siemens	Siveillance Video 2020 R2	version All versions < V20.2 HotfixRev14	Vulnerable	CVE Program (cve.org) e CISA ADP
Siemens	Siveillance Video 2020 R3	version All versions < V20.3 HotfixRev12	Vulnerable	CVE Program (cve.org) e CISA ADP
Siemens	Siveillance Video 2021 R1	version All versions < V21.1 HotfixRev12	Vulnerable	CVE Program (cve.org) e CISA ADP
Siemens	Siveillance Video 2021 R2	version All versions < V21.2 HotfixRev8	Vulnerable	CVE Program (cve.org) e CISA ADP
Siemens	Siveillance Video 2022 R1	version All versions < V22.1 HotfixRev7	Vulnerable	CVE Program (cve.org) e CISA ADP
Siemens	Siveillance Video 2022 R2	version All versions < V22.2 HotfixRev5	Vulnerable	CVE Program (cve.org) e CISA ADP
Siemens	Siveillance Video 2022 R3	version All versions < V22.3 HotfixRev2	Vulnerable	CVE Program (cve.org) e CISA ADP
Siemens	Siveillance Video 2023 R1	version All versions < V23.1 HotfixRev1	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

Low

Privileges required

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
9.9	CVSS 3.1	Critical	3.1	6.0	productcert@siemens.com via NIST National Vulnerability Database
9.9	CVSS 3.1	Critical	—	—	GitHub, Inc. via GitHub Security Advisories
9.9	CVSS 3.1	Critical	—	—	siemens via CVE Program (cve.org) e CISA ADP
8.8	CVSS 3.1	High	2.8	5.9	nvd@nist.gov via NIST National Vulnerability Database

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (score shown at the top: nvd@nist.gov)

Scoring entities (NIST, CNA, ADP) score independently; each score is shown with its origin. For prioritization we use 9.9 (productcert@siemens.com via NIST National Vulnerability Database) as a conservative provisional reference — not a definitive official score.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-502 · Deserialization of Untrusted Data

Other CVEs with this weakness →

EPSS over time FIRST

Oct 23, 2026 → Oct 28, 2026 · 6 reading(s) · max 1.11%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
Monitor serialized objects in requests and unexpected processes spawned by the runtime.

web/proxy/WAF logsnetwork IDS/IPSendpoint telemetry (EDR)application logs

Timeline

What happened to this CVE, newest first.

2026
Affected products added · siemens/siveillance video 2020 r2, siemens/siveillance video 2020 r3, siemens/siveillance video 2021 r1, siemens/siveill
Oct 23, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 23, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 23, 2026
Affected products added · siemens/siveillance video
Oct 23, 2026 · NIST National Vulnerability Database
CVSS changed · 8.8
Oct 23, 2026 · NIST National Vulnerability Database
Source status changed · → Modified
Oct 23, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 23, 2026 · Alertas do Telegram
2023
CVE published
May 9, 2023 · siemens

Source activity

Repeated readings are counted rather than listed.

2× References added · Oct 23, 2026 – Oct 23, 2026
1× Official description updated · Oct 23, 2026 – Oct 23, 2026

References

3 on the record

cert-portal.siemens.com/productcert/pdf/ssa-789345.pdf
Vendor Advisory, NIST National Vulnerability Database
nvd.nist.gov/vuln/detail/CVE-2023-30899
GitHub Security Advisories
github.com/advisories/GHSA-2x6m-x5h6-g6v8
GitHub Security Advisories

Elsewhere on this site

Siemens
every CVE for this vendor

Insecure deserialization
same class

CWE-502
other pages naming this weakness

Related CVEs (same products)

High CVE-2023-30898 A vulnerability has been identified in Siveillance Video 2020 R2 (All versions < V20.2... May 9, 2023

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2023-30899 is "A vulnerability has been identified in Siveillance Video 2020 R2 (All versions < V20.2...", rated High. It affects Siveillance Video (Siemens); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 8.8 describes technical severity. EPSS 1.11% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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